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أنا مش شايف مشكله إنك تدفع 500 جنيه في نضاره خصوصا لو بتسافر كتير الصبح لأن بدون نضارة شمس بتجهد عينك جامد و بتاثر عليها الاشعه فوق البنفسجيه
إحنا كده كده بندفع فلوس كتير على حاجات مش مهمه أوي برضه
dr. Wayne bizer, a fort lauderdale based eye doctor and spokesman for the american academy of ophthalmology says that sunglasses without protection from the two
most harmful types of uv light—uva and uvb—can actually do more harm to your eyes than if you were forced to squint. As everyone knows, when it's really bright out you squint and your pupils constrict to tiny dots—as small as half a millimeter in diameter—to limit the amount of light getting in. When you put on sunglasses, the effect is the same as being in darkened room, the pupil dilates to let in more light. Glasses that don't block uv rays may offer some relief from visible light and reduce your need to squint, but the additional exposure to uva and uvb can be harmful. "let's suppose you put on a very dark pair of sunglasses," bizer says, "your pupil opens up, it dramatically changes in size from half a millimeter to 5 or 6 millimeters. It's an enormous increase, and now you're allowing much more [harmful light] into your eyes than if you didn't wear the cheap sunglasses at all."
wearing sunglasses that don't block out uv rays can do more harm than good - wellness - time.com