Hey thinking of changing my spec. Main crititeria is to reduce the thickness of lens as my power is -6.5.

Problem is I am having a spec made up glass which I am not sure what is the index. If I go and make another spec, say 1.67 index, it might be thicker than current one. Then no point.

What is the max index I could get from the market now ?

Thinking of getting a smaller lens frame so that the lens will be thinner.

Also, will thinner (higher index) lens reduce the 'power rings'.

How about non plastic, what is the highest index which is used commercially ?

I made my glasses a few years ago. It is made of glass. And I remembered the shop was telling me glass is sold to me because the plastic one will be thicker.

Which means if I go back to 1.76 plastic, it might be thicker than the current spec. That will defeat the purpose of making a new one.

I used to wear contact lens. But lately the dryness becomes too unbearable. And then mishandled contact lens gives me eye infection.

Which brand is good ( for maximum moisture ) ?