What is the difference between 1.58, 1.61 and 1.67 index lenses?

A prescription that high in the 1.58 is not going to be very nice at all.

I have to disagree with Sandra...you DID get a lesser quality.

Polycarbonate lenses are quite inferior optically in a power like that, compared to the 1.61 or 1.67

The 1.58 they supply are polycarbonate lenses which are real crappy once you get over a - 3.00

Not only will your visual clarity suffer a lot with polycarb in that power, but chromatic aberrations at the outer edges will probably drive you nuts. Chromatic aberration is rainbow colors within the lens itself, and wil also cause a lot of things you look at to have a blue or green tinge to the edges of them.

You definitely should have gone with the 1.67

Hopefully, for your sake, you chose very small frames. That will minimize the bad effects somewhat.

You don´t get a lower quality. The quality hasn´t got anything to do with the indeces.

Usually you can say there are around 5/10 thinner from one index to another ( from 1.5 to 1.6 to 1.67 to 1.74 ).

You ordered the 1.58 there are just thicker at the edges than the others. If you have a small frame, nobody will notice that. There won´t be a Coke bottle effect lol.

Maybe you should think about this: the next time you want to buy glasses, go to an optician... they can help you when you have a question and you don´t need to go to yahoo lol

In this high power, the best lens to get would be high index 1.74 with high quality anti-reflective coating. This is because they will be about half as thick at the edges as the ones the discount company sold to you.

This high power minifies the appearance of your eye so it is best put into a small frame.

Most people with these higher powers are very happy with soft contact lenses which give more "normal" vision than glasses.

those index just indicates different type of lenses material you are getting.

1.58 should be polycarbonate, the others should be high-index plastics.

higher the index, the thinner your lenses can go to. there's some optical clarity differences btw them, in which polycarbonate are lesser despite of being the highest impact lenses out of all. but the differences are too small to be noted by most people.

looking at your prescription, you should really go for 1.74 index instead, that would be the thinnest high-index plastic lenses available on the market at present. and ye, you should really go for small frame too.

you might want to consider contacts though. it is definitely going to look nicer than wearing a glasses.

p/s minus prescription are minifying images, so your eye will look smaller instead. same power at different type of index should give you the same effect.

I'd like to comment about the suggestions for contact lenses. I have a strong prescription plus I have dry eyes. Because of both, I am unable to wear them for more than a few hours at a time. My eyes start feeling irritated and looking bloodshot and I have to remove them. Lenses for stronger prescriptions are thicker as well so that makes it even worse for me.

1.56 Lenses