Blog

/Blog/

‘Test Experts’ for our Ashes team

Optometry’s professional governing body (AHPRA) prevents us from claiming to be more expert than another optometrist, however it seems from Specsavers’ recent television advertising that it is OK to infer expertise by using a play on words, such is the case with the current Ashes Test cricket series where their undoubtedly clever ads describe Specsavers as the ‘Test Experts’.

In response to a recently published blog, though, we can’t fail to realise the potential for them to have used their ‘Test expertise’ against the home side, as Specsavers is after a fully owned English company!

The blog in question describes how Aussie batsman Shaun Marsh was fitted with soft contact lenses as part of Specsavers sponsorship deal, with Shaun describing how this had improved his vision. This seemed to work well in Adelaide, where Shaun hit over a century. But when it came to his recent performance in Perth, he only scored 28, while brother Mitchell scored 181, which by our calculations is a whopping 646% difference. Surely genetic similarity should ensure a closer result, so maybe it was the wind at Perth that led to his contact lenses drying out and blurring his vision?

Now we don’t have access to Shaun’s optical records, but the description in the blog would suggest he suffers a mild degree of short sightedness, and while contact lenses are a great solution, we wonder instead whether he would do better with orthokeratology (OK) lenses, which are worn overnight so that vision is corrected during all waking hours. The huge advantage of OK is that no lenses are needed during the day for clear vision, so there’s no potential for irritation or lens displacement while at the crease.

We are a 100% Australian owned and operated practice, and although across the other side of the country in beautiful Brisbane (unlike the official eyecare sponsor – who are they ‘Root’-ing for?), it is in our fellow countrymen’s interest to provide the best solution to our team. So Shaun – we call out, on behalf of all Aussies, and to help you keep up with your brother, come in and see us or any other independent, Aussie-owned optometrist ‘Test Experts’ while England are in town to check out your suitability for OK contact lenses!

By | 2018-06-28T07:03:00+00:00 18th December 2017|Contact Lenses, In the news, Just for fun|2 Comments

Makeup Tips for Eye Health

The products you use around your eyes play an important part in your eye health. Similar to brushing your teeth daily, eye hygiene and removal of make-up is essential. We all react to products on our skin differently and for those of us who are more sensitive, hypo-allergenic products are preferable. For those with dry eyes or contact lens wearers, it is particularly important to develop healthy habits with eye hygiene.
Eye make-up products; whether they are applied to our eyelashes or around our eyes, affect different anatomical parts of the eye. Below are some tips for different eye make-up application.

-Eyeliner. When using eyeliner, be mindful that application on the waterline (inner eyelid) can block the meibomian glands (see image 1) and contaminate the eye 1.  A study done in the Faculty of Science at Waterloo found that within 5 minutes, 15-30% more make-up particles were found in the tear film when eyeliner was applied to the waterline, compared to application outside of this 1. Our meibomian glands secrete the lipid layer of our tears which stop our tears from evaporating and thus it is important that these glands are open and functioning. Shortly after application of eyeliner, there are demonstrated changes to the tear film and its stability 2.
Eyeliner application if used, should avoid the waterline to reduce its effect on our tears.

BlogPic1 resized

Image 1. Layers of tears.

-Eyeshadow. This is applied further from the glands and inner structures of the eyes, however certain types of eye shadows that smear easily, may also end up in your tear film. Studies show that this product in addition to mascara, can cause the greatest discomfort amongst many cosmetic products 3. Contact lens wearers should also be mindful that eyeshadow may deposit on their contact lenses and this should be avoided 3.

-Mascara. This is a common make-up item that needs to be changed regularly. Our skin has normal bacteria such as Staphylococcus Aureus and some people may have a build-up of bacteria on their eyelashes termed ‘anterior blepharitis’. A maximum of 3-month use of a mascara wand before replacement is important to reduce harbouring bacteria 4. When your optometrist performs a slit lamp microscopy exam, they look at your lashes for signs of blepharitis. If this is present, you may need an additional eyelid cleaner such as an antibacterial foam, which is used to scrub your lids and lashes at least once per day. Research has demonstrated that mascara can also cause pigmentation inside the eye at the lacrimal sac (part of the duct to the lacrimal system which contains anatomical structures used for tear production and drainage) 5.

-Anti-ageing eye creams. These creams are often applied around the eyes. Research shows that the retinoids present in these eye creams can negatively affect meibomian gland function (the glands which secrete the oil in our tears), and potentially contribute to dry eye disease 2. Studies investigating the effect of systemic isotretinoin on animal models demonstrated signs of blepharitis and meibomian gland ductal epithelium thickening, as well as decreased mature gland acini, which contribute to the lipid (oily) layer of our tears 2. There was also reduction in the number and size of meibomian gland acini (see image 2) 2. Human studies of those taking systemic isotretinoin for acne also demonstrated dry eye symptoms, blepharitis and Meibomian gland dysfunction. The lacrimal gland, which secretes the aqueous tears, also releases isotretinoin. “The potential impact of the usage of anti-aging facial and eye creams and gels on developing meibomian gland dysfunction and dry eye syndrome is great” 2.

pic 2

Image 2. A single meibomian gland has clustered acini that secrete meibum. (Knop et al, 2011.)

• Pigmented products used over many years, may accumulate in the conjunctivae and the lacrimal system 2,6. The conjunctiva is a mucous membrane forming most of the surface of the eye – the white part of the eye you see in the mirror.

• Cosmetic products may also cause contact lens spoliation 2.

Removal of make-up before going to sleep is essential. Water alone cannot effectively remove cosmetic products, whereas surfactants in cosmetic removal products dissolve and alter the solubility of oils and waxes found in make-up 2. Note that water-proof mascara is removed best by oils, so investing in an oil-based make-up remover is beneficial 2. Oil-free make-up removal products have different surfactant concentrations which are good at removing cosmetics, however may solubilize the sebum in the eyelids and irritate the skin around your eyes 2. Your optometrist has eye-lid wipes and antibacterial foams that may also be used for make-up removal, particularly for those with dry/sensitive eyes.
The Tear Film & Ocular Surface Society Dry Eye Workshop (DEWS 2) latest report notes that exposure to cosmetic products, many of which contain toxic products, can elicit dry eye symptoms 7. For those with very sensitive eyes and/ or moderate to severe dry eyes, your optometrist may recommend avoiding eye make-up.

**Take home messages **
• The best way to ensure no additional irritation of the eyes, dry eyes and deposits on your contact lenses is to avoid eye make-up.
• When make-up is applied, avoid the inner part of the eye, particularly the waterline, as this can affect your tears and cause irritation.
• Retinoids present in anti-ageing creams and gels can contribute to dry eye and meibomian gland dysfunction.
• Ensure you have a good make-up remover that you use before going to sleep.
• Ensure all make-up products are changed regularly and that make-up brushes are washed regularly too.
• Your optometrist examines the health of your eye with a slit lamp microscope and can detect signs of cosmetic products depositing on the eye, tear film and/or your contact lenses.

 

References
1. Alison Ng, Katharine Evans, Rachel V. North, Christine Purslow. Migration of Cosmetic Products into the Tear Film. Eye & Contact Lens: Science & Clinical Practice, 2015; DOI: 10.1097/ICL.0000000000000124
2. Alison Ng, Katharine Evans, Rachel V. North, Christine Purslow. Impact of Eye Cosmetics on the Eye, Adnexa, and Ocular Surface. Eye & Contact Lens: Science & Clinical Practice, 2016. 42(4): 211-220. DOI: 10.1097/ICL.0000000000000181
3. Gao Y & Kanengiser BE. Categorical evaluation of the ocular irritancy of cosmetic and consumer products by human ocular instillation procedures. J Cosmet Sci 2004; 55: 317– 325.
4. Pack LD et al. (2008). Microbial contamination associated with mascara use. Optometry. Oct;79(10):587-93. doi: 10.1016/j.optm.2008.02.011.
5. Clifford, Luke & Jeffrey, M & Maclean, H. (2011). Lacrimal sac pigmentation due to mascara. Eye (London, England). 25. 397-8. 10.1038/eye.2010.209.
6. Ciolino, Joseph & M Mills, David & R Meyer, Dale. (2009). Ocular Manifestations of Long-Term Mascara Use. Ophthalmic plastic and reconstructive surgery. 25. 339-41. 10.1097/IOP.0b013e3181ab443e.
7. Gomes, J et al. (2017_. TFOS DEWS II iatrogenic report. Ocul Surf. Jul;15(3):511-538. doi: 10.1016/j.jtos.2017.05.004.

Why are my eyes so itchy?

I’m sure most of us can relate to having experienced some sort of seasonal allergy when Spring and Summer comes around. For some it’s a mild case of hayfever, whereas for others, it can be a struggle getting through those months. Besides the constant runny nose and sneezing, seasonal allergies also have a large effect on our eyes – from watery eyes to allergic conjunctivitis.

[1] Particularly for our contact lens wearers, the symptoms often are escalated.[4]

Let’s rewind back to the basics and explain how your eyes are affected by seasonal allergies. Your eyes are one of the most sensitive organs in your body. The surface of your eye is packed with receptors and mast cells which are essentially a group of cells that respond to stimuli, such as allergens in the environment (e.g. pollen during Spring and Summer). For those who are more sensitive to these allergens, it can trigger an immune response and begin the cascade of allergy symptoms.[2,3] Papillae (small bumps) under the top eyelid is commonly seen in patients who experience seasonal allergies.

Fortunately, eye drops that contain anti-histamine and mast cell stabiliser components can be used to relieve these symptoms. However, allergens have a particular affinity to soft contact lenses, which can often complicate the condition for our soft contact lens wearers. In mild cases, symptoms can be controlled with scheduled instillation of anti-allergy eye drops before and after contact lens wear.[4] It is also very useful to keep a bottle of lubricating eye drops on hand that can be used throughout the day to wash the allergens out. During allergy season, it is even more important to be diligent with the care and maintenance of your contact lenses, ensuring you do the ‘rub and rinse’ to rub off all the allergens on your lenses.

Some general tips for our soft contact lens wearers who have seasonal allergies – it may be worthwhile and more comfortable to switch back to wearing glasses more often than contacts during allergy season. If soft contact lenses are an essential in your everyday life however, you may want to consider switching to daily disposables rather than wearing your usual fortnightly/monthly lenses. This way you can replace the lenses more regularly and have less allergen exposure from frequent wear.

Furthermore, allergies and itch can increase the tendency to rub your eyes, however rubbing is no answer and can often make it worse! The best way to relieve itch is to apply a cold compress over your eyes – the cooling sensation will keep both the itch and swelling away.[4]

And lastly, if symptoms do not improve and you feel it is affecting your quality of life, make sure you book in with your optometrist for further investigation and opinion on treatment. We’re always here to help!

References

  1. Ackerman, S., Smith, L. M., & Gomes, P. J. (2016). Ocular itch associated with allergic conjunctivitis: latest evidence and clinical management. Therapeutic Advances in Chronic Disease, 52-67.
  2. American College of Allergy, Asthma and Immunology. (2014). Types of Allergies: Eye Allergy. Retrieved March 16, 2017, from American College of Allergy, Asthma and Immunology
  3. Bielory, L., & Ghafoor, S. (2005). Histamine receptors and the conjunctiva. Current Opinion in Allergy and Clinical Immunology, 437-40.
  4. Wolffsohn, J., & Bilkhu, P. S. (2012, May 24th). Maintaining contact lens wear in patients with allergic conjunctivitis. Contact Lens Update: Clinical Insights Based in Current Research.

By | 2018-06-28T07:03:00+00:00 21st July 2017|Allergies, Contact Lenses, Eye conditions|0 Comments

Macular Degeneration Awareness week 2017

Macular Degeneration Awareness week is here. To raise awareness we invite you, your family, your friends – anyone over 50 – to come in and spend 10 minutes with one of our Optometric Assistants (who are mostly QUT optometry students) for a free macular health screening and discussion using our cutting edge technology. We’ll be offering this service until the end of May – please call us on 3210 1822 to set a time with us. (Note this is not a full eye exam – we recommend a comprehensive eye exam at least every 2 years.)

The Facts:
– An eye exam can save your sight
– 1 in 7 Australians over 50 have some evidence of MD
– You have a 50% chance with a direct family history
– You can have the early signs without knowing
– Diet and lifestyle changes support good macular health.

Book in a short screening today, or a full eye exam with one of our optometrists to understand the whole picture of your risks for MD.

A gold coin donation for the Macular Degeneration Foundation will be appreciated.

By | 2017-05-25T14:10:52+00:00 25th May 2017|In the news, Uncategorized|0 Comments

Research at Gerry & Johnson

Did you know Gerry & Johnson Optometrists are involved in clinical in-practice and international research projects?

Kate is busy working on her PhD, researching the optics of OrthoK and eye muscle coordination, which is due to be completed in July. All of the data for this research was collected from the practice, with our special PhD participants being involved in the key data collection phase from 2014 to 2016.

Kate and Paul are also working on an international research collaboration which will measure signs of UV damage and their effect on reading focus across a number of countries.

Kate & Paul returned back from a trip to Las Vegas in January to give presentations & learn about the latest treatments with contact lenses at the Global Specialty Lens Symposium Conference.

Paul (pictured above) is directing a new set of contact lens studies investigating new designs, for which we have been recruiting QUT School of Optometry students, who get to learn about contact lenses while participating in research. One day in February, we had 10 participants in the practice until 8pm that night trialing three different types of soft lenses for fit and comfort differences. We fed them pizza to show our appreciation!

Kate broke her ankle

On Saturday 11th February Kate, along with her husband Paul and stepson Jack, started on the Overland Track in Tasmania. After a long day climbing a mountain and trekking along thin boards in horizontal freezing rain, they were descending earth/stone steps only 15 minutes from the conclusion of the day’s walking, when Kate rolled her ankle outwards and heard a pop. Yuk. A fractured fibula.

She got a free helicopter ride to Hobart and also enjoyed her first ambulance and wheelchair ride, and now has 6 weeks in a cast. It was an adventure; just not quite the adventure she’d hoped!

If you’ve ever had crutches before you’ll know they’re mega tiring to use, so our wonderful staff will be escorting you to and from Kate’s consultation room, and Kate will also be asking some help from her colleague optometrists Felicity and Natalie.

Thank you for your patience while Kate’s mobility is impaired over the next several weeks.

By | 2017-03-02T11:49:38+00:00 2nd March 2017|What we've been up to|0 Comments

Volunteer eye exams in Mexico

VOSH International is a volunteer group that brings eye examinations and glasses to those who cannot afford eye health care in developing countries around the world. I was lucky enough to have embarked on their mission to Tecalitlan, a small town in Mexico, in November last year. The mission group included 3 Optometrists from USA and Canada, 7 optometry students from the Queensland University of Technology (including myself), 9 optometry students from the Illinois College of Optometry and several volunteers who helped in pre-testing, dispensing and translating.

Collectively, we saw over 3500 patients over 8 days with approximately 2800 patients requiring glasses. I had seen more eye disease and other ocular conditions in these 8 days than I had ever seen in Australia. Almost every patient had visible sun damage to their eyes (pterygiums and pingueculae), a large percentage of the aging patients had advanced cataracts, many had high blood pressure and diabetes with consequent damage to their retina (some were advanced and needed urgent attention), along with untreated glaucoma and macular degeneration. It was also very common to see patients with immensely high uncorrected vision, and not being able to afford glasses meant that they have lived their entire lives not knowing clear vision until the day we gave them glasses. Almost all of these patients were unaware of the current state of their eye health, all they knew was that their vision was deteriorating and they never understood why.

We live in a first world country where the luxury of health care is so easily accessible. Rarely would any of these conditions be seen so advanced in their time course due to preventative therapy, early detection and access to effective and safe treatment options. Not only was this trip incredibly eye opening, but it was also very humbling to witness how these people could be so happy and content despite the little that they had. I can honestly say that this trip had taught me so much more than I could ever imagine, and not only in the aspect of optometry, but also from the people. I will always be grateful for this experience and could only hope that our time in Tecalitlan has helped change the lives of the people we saw for the better.

For more information on VOSH International and their mission, please visit http://vosh.org/. You can also do your part to help by donating to the cause, every little bit helps!

 

By | 2017-03-08T09:40:33+00:00 1st March 2017|What we've been up to|0 Comments

Eye myths… fact or fiction?

Eating carrots helps you see in the dark.

True! Carrots are full of vitamin A which is a precursor to an important chemical substance used by the light sensitive cells in the retina (the rods) for vision in low light / night time. If you are deficient in vitamin A, you can have problems with night vision.

[1] However, having an excess of the vitamin does not enhance your vision above what is normal. So eating carrots all day like Bugs Bunny will not give you superhuman eyesight but just ensure your visual system is working normally!

If you watch TV for too long, you will go cross-eyed.

Myth! Watching TV for a long period of time won’t cause you to become ‘cross-eyed’ but it can make your eyes quite tired, sore and red. This is because when you are concentrating on screen (TV, phone, computer etc), you blink less than normal which contributes to an increase in evaporation of your tears.[2] Your tears normally create a uniform film over the front surface of the eye to protect it. Watching a screen has been shown to reduce our blink rate meaning that the interval between blinks increases. This allows the atmosphere to evaporate our tears leading to dry eyes. The symptoms of dry eye include red, sore, gritty, tired, stingy and watery eyes. It is recommended that you spend a maximum of 30 minutes on a screen before taking a break to allow your eyes a chance to rest.

Wearing glasses will make your eyes dependent on them and your vision worse.

Myth! At least 2 or 3 of my patients will ask me whether this is true each and every day so it is a very popular myth. It is not at all true. However, most people will think their vision seems worse when they take their specs off compared to before they put their specs on. This has nothing to do with the eyes themselves but with your brain. Your eyes are the hardware of vision – receiving the light signals from the world around us; and the brain is the software of vision – interrupting the neural signs from the eyes to perceive and interpret the information. The brain very much prefers clear vision so once you put specs on, your brain quickly adapts to accepting the improved vision. Once you remove your specs, your brain does not like the same blur that was there before. Your brain becomes less tolerant of the blur but your eyes remain the same.[3] Vision, however, does change particularly with age, but this change will happen regardless of whether you wear specs a little, a lot or not at all.

Onions make you cry.

True! Onions contain acids and enzymes within their cells. This acid is kept separate from the enzymes, but chopping onions allows the acid and enzyme to mix. This causes the onion to release its juice and sulphur based gas. This gas wafts towards your eyes and reacts with your tear film, combining to form sulphuric acid.[4] The sulphuric acid causes your eyes to burn / sting which in turns stimulates your tear glands to produce more tears in an effort to dilute the noxious substance. This is how you inevitably end up crying while chopping onions! Try refrigerating the onion before chopping – this will help reduce the gas emitted from the onion and avoid the tears.

It is impossible to sneeze with your eyes open.

Myth. It is really only possible to keep your eyes while sneezing if you make a big concerted effort to do so or if you force your eyes open (ie hold your eyelids apart) as the natural response to sneezing is always closing your eyes. This happens due to an involuntary reflex. The nose and eyes are linked by the trigeminal nerve (one of the cranial nerves).[5] The stimulation for the sneeze sends a nerve signal up one nerve to the brain and down another nerve to the eyelids triggering a blink. So, much like a reflex to kick your foot out when the doctor taps on a tendon / nerve just under your knee, closing your eyes while sneezing just happens automatically.

If you have know any other eye myths you would like debunked (i.e. old wives tales or something your colleague at work told you), let us know and we will debunk away!

 

References

[1] Nutrition and eye health book

[2] Wimalasundera S. Computer vision syndrome. Galle Medical Journal. 2006;11(1):25-29.

[3] Cufflin MP, Mankowska A, Mallen EA. Effect of blur adaptation on blur sensitivity and discrimination in emmetropes and myopes. Invest Ophthalmol Visual Sci. 2007;48:2932–2939

[4] Nagata T. An onion enzyme that makes the eyes water. Nature. 2002;419:685.

[5] Birch, CA. Sneezing. Practitioner 1959;182:122-124.

By | 2018-06-28T07:03:00+00:00 24th February 2016|General Eye Interest, Just for fun|0 Comments

Interesting uses for contact lenses

Did you know that contact lenses are not just used for vision correction? There are many special applications of contact lenses – some of them are quite surprising!

Cosmetic

I recently saw a patient with a badly scarred and blind eye. He was uncomfortable with the way the eye looks especially in photos so was wondering whether there was anything he could do to improve the cosmesis! We’ve all seen the wacky cosmetic coloured contact lenses (cat’s eyes anyone?) but what if you just want a ‘normal’ looking eye? Well, prosthetic contact lenses are the answer. I decided to fit my patient with a hand painted soft prosthetic contact lens with a black pupil – it is painted as an exact match to his uninjured eye! The result is quite impressive! Check out the before and after photos (consent obtained to share images)

Before:

Faiz before websize copy

After:

Faiz after websize copy

Therapeutic

Contact lenses are also commonly used as bandages or barriers for people who suffer from recurrent corneal problems or if their eyelashes grow in the wrong direction. The contact lens protects the surface of the eye and prevents scratches, abrasions and even opportunistic infections.

[1] Contact lenses can also act as a tool for rehabilitating the ocular surface in ocular surface disease, especially severe dry eye. Dry eye is a very common problem among a wide demographic of the population. Mild to moderate dry eye is usually treated successfully with lubricating eye drops, warm compresses/lid massage and changes in diet. However, severe dry eye is associated with significant ocular health problems and can be very debilitating as symptoms are quite significant. In cases of severe dry eye often associated with autoimmune conditions such as Sjogren’s syndrome and Graves’ disease; bandage contact lenses can help retain the tear film on the eye, leading to increased comfort for the patient.[2]

Drug delivery

Eye drops are the most common method of therapeutic drug delivery to the eye, accounting for 90% of all ocular medications.[3] However, eye drops are actually significantly inefficient as they have a short retention period on the eye limiting just how much drug can be absorbed by the eye. As the medication drains from the eye quickly through the tear ducts and into the nose, unwanted drug can be then be absorbed systemically.[4] This then increases the likelihood of systemic side effects. Medication impregnated on a contact lenses would be slowly released into the eye which suggests a better rate of absorption and therefore drug effectiveness. This technology could be applied to glaucoma medication, as well as anti-inflammatory and antibiotic drugs.

Contact lenses can be used in many ‘non-traditional’ ways for cosmetic, therapeutic and even drug administering reasons, not just for vision correction.

 

References

[1] DeNaeyer GW. Therapeutic applications of contact lenses. Contact Lens Spectrum. 2010; May:

[2] Harthan JS. Therapeutic use of mini-scleral lenses in a patient with Graves’ ophthalmopathy. J Optom. 2014; 7(1): 62-66.

[3] Bourlais CL, Acar L, Zia H, Sado PA, Needham T, Leverge R. Ophthalmic drug delivery systems. Prog Retin Eye Res. 1998;17:33–58.

[4] Wilson CG. Topical drug delivery in the eye. Exp Eye Res 2004;78:737–43.

By | 2018-06-28T07:03:01+00:00 17th February 2016|Contact Lenses, Eyesight and Health|0 Comments

Protecting eyes against UV

We’ve all heard about the importance of wearing hats and using sunscreen to protect our skin from the harmful effects of UV radiation. But how can we protect our eyes? Sunglasses offer some of the best ocular protection from UV light but blocking the harmful rays from reaching the delicate tissue of our eyes. Most sunglasses block (category 2 and 3) block more than 95% of UV radiation. Keep in mind that the colour or the darkness of the lens tint does not indicate how much UV is blocked so always check the tag/label to determine the level of protection.

Some prescription spectacle lenses also block UV light. At Gerry & Johnson Optometrists, all of our prescription lenses block 100% of both UVA and UVB light to protect our eyes from the early development of eye disease. The UV protective treatments are applied on the front and back surface of the lens, as around half of UV light entering the eye is reflected from the back surface of the lens.

Some contact lenses also offer UV protection. Although sunglasses can efficiently block the UV radiation coming directly from the sun, they may fall short elsewhere. Unless the frame is designed to wrap the face like a pair of goggles, sunglasses block very little of the obliquely incident UV radiation (as seen in the figure below).  Peripheral UV radiation has been shown to be a particular threat to eye health due to the phenomenon of peripheral light focussing (PLF), where oblique light is refracted by the peripheral cornea and focused at the nasal limbus (white part of the eye towards the nose).

PLF has been shown to play a significant role in the development of pterygium and some forms of cataract. Since soft contact lenses cover the cornea and land just past the limbus on the white of the eye, they are able to protect the eye more completely. Also, as contact lenses are worn generally for significantly longer periods of time than sunglasses, they are able to provide continuous protection against UV.

The benefits of UV light

At the risk of confusing the issue, did you know that UV light is not all bad!? In small amounts, UV radiation is actually a benefit to the human body. UV radiation is required for the synthesis of vitamin D which is needed for the growth and maintenance of strong healthy bones. UV light has also been shown to be beneficial for the eyes as research shows that it has a myopia control effect. Myopia, or short-sightedness, is fast becoming one of the major vision problems around the world. Even small degrees of myopia significantly increase a person’s risk of eye health complications such as glaucoma, cataract and retinal detachment. Research suggests that the protective effect of UV radiation involves the light-dependent release of dopamine in the retina. Dopamine has been shown to inhibit axial elongation (increases in eye length) which leads to myopia development and also progression. The amount of UVR required for good health is easily gained by spending approximately ten minutes outside each day in ambient light. So for any outdoor activities, especially over the summer (think the beach, pool and shopping days!) remember to wear protective eyewear and clothing!

If you haven’t already, check out last week’s blog on the known health effects of UV!

References

Bergmanson, P.G., Sӧderber, P.G. The significance of ultraviolet radiation for eye diseases. A review with comments on the efficacy of UV-blocking contact lenses. Ophthalmic Phys Optics. 2002; 15(2): 83-91.

Sliney, D.H. Photoprotection of the eye – UV radiation and sunglasses. J Photochem Photobiol B: Biol. 2001; 64(2-3); 166-175.

 

By | 2018-06-28T07:03:01+00:00 4th November 2015|General Eye Interest, Sunglasses|0 Comments