Naked Science Forum

Non Life Sciences => Technology => Topic started by: Chemistry4me on 01/06/2009 01:08:53

Title: Why do glasses still help you see better when you flip them around?
Post by: Chemistry4me on 01/06/2009 01:08:53

Why do glasses still help you see better when you flip them around (when you look through them front on)? Is this bad for my eyes?

Title: Why do glasses still help you see better when you flip them around?
Post by: Chemistry4me on 01/06/2009 01:43:54

The image looks just as clear and sharp as if I was wearing them normally.

Title: Why do glasses still help you see better when you flip them around?
Post by: Chemistry4me on 01/06/2009 01:45:52

RD you post deleter! [:D]

Title: Why do glasses still help you see better when you flip them around?
Post by: lyner on 01/06/2009 16:26:25

I might suggest it's because the outer surface is scratched worse with age and the inside surface is less so. The flare would then be better when you briefly hold them the other way. There is also a possibility that, because all spectacle lenses tend to be curved away from your eye, the effect of flare could also be less with the concave surface on the outside. Why not have them normally curved the other way? You'd look darft.