How to choose eye-safe sunglasses

0

Quality sunglasses can be with glass, and with plastic lenses. The accessory should not be bought at retail outlets where it is impossible to verify the authenticity of the manufacturer, the ophthalmologist said.

She noted that the sun damages the eyes more if a person wears cheap plastic glasses of unknown origin that do not have UV protection . “This is due to the fact that under dark glass the pupil expands and the amount of ultraviolet light that penetrates the eye increases,” the specialist explained.

It is better to buy sunglasses in proven places, for example, many opticians have a special a device where you can find out about the degree of UV protection. According to the doctor, the accessory should provide protection not only against UV radiation, but also protect against high-energy blue rays, which are dangerous for the eyes.

“The best protection is provided by eyeglass optics with a 99 percent degree of protection against ultraviolet – with UV 400 marking. Such glasses can be quite expensive. It is much more common to find models of the UV 380 format, which block up to 95% of UV rays,” the ophthalmologist continued.

She added that other models of glasses, even with tinted glass, protect the eyes from the negative effects of ultraviolet rays worse. . In any case, the degree of protection must be higher than 50%.

At the same time, the doctor clarified that the degree of protection against UV rays and the degree of darkening are different concepts. For example, glasses with a small degree of darkening can simultaneously have 100 percent UV protection, but they are uncomfortable to use for people with high light sensitivity of the retina. The degree of darkening, in turn, affects only the brightness of image perception, as well as the comfort of wearing glasses.