It’s summer time, and whilst the weather is warm our eyes are at their most vulnerable. Here we explain why some sunglasses help to protect your eyes, and
some do quite the opposite…

When outdoors in the summer months, particularly when the sun is at its brightest, our eyes will squint instinctively and the pupils will shrink to tiny dots as small as half a millimeter in diameter. This is a protective reaction by the eye, limiting the amount of potentially damaging light from entering the retina.
Extended exposure to the Ultraviolet (UV) Rays in sunlight has been linked to permanent eye damage and conditions including cataracts, macular degeneration and ocular melanoma. This is why it’s so important to protect the eyes when the sun is strongest, and why properly manufactured sunglasses offering protection from UV rays are so popular.

Sunglasses also offer the freedom to go outside in sunny weather without constantly blinking or shading our eyes, because the tinting of the lens gives the eyes the impression of being in a darkened space, allowing them to dilate and function as they would normally.

Because of this, the tinting should always have a UV filter, protecting the eye during a state where the pupil is at it’s widest and most exposed. Unfortunately, cheaper models commonly sold on UK high-streets don’t always guarantee that protection.
Some cut-price and fake sunglasses don’t block UV rays sufficiently, allowing them to infiltrate the expanded pupil at a state of heightened vulnerability.
So although substandard models and designer knock-offs may look good and offer an adequate level of relief from squinting, the additional exposure to UV rays can be doing more damage to your eyes than if you were using no protection at all…

For advice on choosing the right sunglasses this summer, book an appointment with Dominic Tunnell Opticians today.

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