I was talking to a friend at work today who said that cheap sunglasses are the worst thing for your eyes as some of them dont have uv protection. She sad that the sunglasses allow your pupils to dilate as it makes everything appear darker, which is bad for your eyes as more UV light then gets in if the sunglasses dont have uv protection. So basically no sunglasses are better than cheap ones.
This has me worried as I am always buying cheap sunglasses. Has anyone heard of this?