I got new glasses. Why do things look bigger?!
Question: I got new glasses. Why do things look bigger?
Answers:
Mango... if your old glasses had RI = 1.74, your Rx must be relatively high.. is that right?
And now you've got RI = 1.5 because you want to save $$, and now your glasses are really REALLY THICK?...
Anyhow, here's the answer:
Image size when viewed through a lens is related to the power... and the FRONT CURVE of the lenses. Now your old ones 1.74 probably had a very flat front curve... whereas your new 1.5 lens will probably have a +4 or +6 front curve, which would tend to magnify the images (relative to your old glasses).
NB. Both pairs of glasses actually minify your world (as your'e nearsighted)... but the coz you're used to the 1.74, the 1.5 minifies less, meaning that it appears to be larger.
things looks bigger because your eyes are broken. if the very pair of glasses you were given are now wrong, it means your eyes are wrong, not the glasses. But why would you bother asking your eye doctor about this when you could ask a bunch of morons on yahoo answers?
That's why you have glasses, it magnifies things so you can see better.