Yeditepe University Eye Health and Eye Diseases Specialist Prof. Dr. Ilgaz Yalvaç draws attention to make provision for our sunnies's preferences.

Lenses Should 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.

CE (European Conformity) 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.


Lenses Shouid Focus 0n 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 Shouid 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,


Every Expensive Sunnies Doesn't Refer Good Ouality

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.

Sunnies Lens Type Doesn't 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.


Whether you live in Istanbul, across Turkey or around world, specialists at Yeditepe University Healthcare Institutions are available to review your medical records and provide an expert opinion on your diagnosis or treatment plan -without the need for an in- person visit.

Yeditepe University Healthcare Institutions collaborates with digital platforms via tele-medicine, to offer remote second opinions from Yeditepe University Healthcare Institutions in virtually every medical specialty. Having a second opinion can reassure you about a challenging diagnosis, or help you and your doctor plan the most appropriate course of treatment.

To have a medical second opinion, click here and complete the online form or call us on 009 0216 578 4 578

Making an appointmet at Yeditepe University Healthcare Institutions couldn't be easier, wheter you use your private medical insurance, pay for your own treatment ora re funded by third party.

As one of the region's leading independent private hospitals, we offer appointments with World class specialist and experts.

As an international patient, you will be you will be offered comprehensive service in the language of your choice right from your initial enquiry, through your medical treatment and, if necessary, help in liaising with your doctor in your home country upon your return home.

To book an appointment, click here and complete the online form or call us on 009 0216 578 4 578

Plese click here for Frequently Asked Questions regarding Yeditepe University Healthcare Institutions