JOIN USIf sunglasses keep the eyes safe from harmful rays in summers, then they are all the more effective in winters. Research shows that winter brings with it double the threat of eye damage. Experts say that winter sun sits lower in the sky and at a different angle than summer months. It actually leads to more exposure to harmful sun rays if one is out for a longer periods of time. It can be damaging to various layers of the eye. Here are reasons why one must wear sunglasses in winters:
* Protection from glare: Wintry precipitation coats every surface, and it leads to bright reflections of sunlight, which cause glare that can impair vision. This reflective glare is dangerous while driving. Sunglasses prevent the glare and provide safer and more comfortable vision.
* Filter UV rays: Exposure to UV radiation is linked with cataracts and macular degeneration. UV rays damage the corneas, which in the long run lead to cataract. Quality sunglasses filter harmful UVA, UVB and UVC rays.
* Act as wind barriers: Winters can be windy. Dust and debris in the wind can cause corneal abrasions. Sunglasses act as wind barriers and prevent the windblown particles from entering the eyes.
* Prevent headaches: The pupil in the eye controls the inflow of light reaching the retina. Pupil dilates to allow more inflow of light in dim light conditions, while it constricts to prevent too much inflow of light in bright light conditions. Constant constriction of pupil leads to headache and eye strain. Sunglasses balance the amount of light entering the eyes, which increases comfort.
* Improve vision: Eyes require just the right amount of light for undisturbed vision. Too much light causes "bleaching" of the retinas, which reduces visual acuity. Hence, wearing high-quality sunglasses becomes absolutely crucial even in winter months.
I Rahumathullah
(The author is MD, Maui Jim)