Stating that the eyes are vulnerable to sun rays and infections these days when we enter the summer season, Yeditepe University Hospitals Eye Health and Diseases Specialist Prof. Dr. Ilgaz Yalvaç also added it is possible to protect eye health in summer with simple measures such as wearing sunglasses. Referring to the seven points to be considered when choosing sunglasses, Prof. Dr. Yalvaç listed the mistakes we know to be true…

Glasses Must Block Ultraviolet Rays

The sun's rays emit ultraviolet (UV) radiation, which human eyes can not detect or can not feel. The sungiasses, which allow us to protect our eyes from the sun, must have UV protection and must be suitable for our eyes. The sunglasses absolutely must be certified regarding cutting off UV or ultraviolet rays. Normally every lenses can block UV at different rates, however special coatings must be reguired for effective UV blocking system.

The power of the sunglasses to block the light is indicated by inscriptions such as UV200, UV400 and UV600. Especially at the seaside and when we are skiing, sunglasses with minimum UV400 protection are reguired.

It Must have CE (Conformité Européene) Certificate

Ouality sunglasses must have a reliable registration certificate, Since 1995, CE (European Conformity) is marked on quaiity sunglasses according to European Union standards. The CE cenificate states that the product meets the minimum safety requirements, When buying sunglasses, make sure that the lenses are stained and mica, and check if there are scratches, blisters and curvatures on the lens.

Glasses Must be Focused on a Vertical Line

Another way to understand quality is to focus on a vertical line after wearing the sunglass. In this case,when you move  the sunglass, which is without prescription, the image does not move, as well. When you move sunglass slightly up and down or right to left, if there are refractions in line, then the sunglass isn't suitable.

Light Absorption Rate Should Be Appropriate

The 'light absorption rate' in the operating instructions indicates how much of lenses absorb, how much reflect and how much light comes from outside, 40-50 percent in urban environment, 50-70 percent in mountain ous regjons where sun rays come steeper, 80-85 percent absorption by sea and skİİng are sujtable,

Not Every Expensive Glasses Qualified

İt is not enough for the sunglasses to prevent excess light from passing. On the contrary it harms, Because when the colored lens is attached, the pupil does not shrink, Thus, harmful UV rays enter the eye in abundance, A sunglass needs to be certified for quality and UV blocking.

Mirrored or Polarized Glasses Do Not Provide Extra Protection!

Since mirrored lenses reflect some of the light coming into the eye, they can be preferred especially at the seaside where there is intense light . However, mirrored coatings reduce the amount of light to the eye, but do not affect the UV blocking rate, Although polarized lens feature is not normally associated with UV blocking, both poiarized and effective UV lenses provide safer and better viewing comfort.

Do Not Ever Use Imitation Sunglasses!

It is better not to use imitation sunglasses than not to use them at all. Sunglasses, which only block visible light but do not provide a blockage against UV rays, disable the natural ability of the pupil to protect itself from the eye. Since the pupil will open well in the dark environment provided by the sunglasses, invisible UV rays enter too much from the open pupil. Therefore, fake sunglasses without UV filters should not be used.

Common Misconceptions

• UV protection is not related to the darkness of the color of the glasses, but to the making agent. The coloring ratio provides visual comfort only by reducing the intensity of the light.
• Polarized glasses stop glowing but have no protection against UV light.
• Cleaning the glasses with the tip of the clothes, and throwing them in the bag or pocket randomly is one of the most common mistakes. These errors cause micro scratches on the glass. These invisible scratches deteriorate the quality of vision over time. 
• The glasses should be stored in the original box when not in use; cleaning should be done with running water, soap, or microfiber cloth provided with the product.
• People who wear contact lenses should wear sunglasses even if their lenses are UV filtered. Sunglasses protect against the problem of drying eyes that contact lens wearers often encounter.
• In environments where the sun is very intense, we must protect our eyes from the undesirable effects of sun rays with sunglasses and visor hat support.

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