Any lens better than High Index lens

Hello,

I have -9.50 (spherical) and 0.75 (cylindrical) with 180 deg axis in both
the eyes. Till now, I have been using High Index lens of type 1.8. Is there
any other lens which is better than this and lighter in weight? I am
basically looking for a lens which is relatively less thick and light
weight. I have heard of polycarbonates, but I do not know whether this is
applicable to me. Contacts is ruled out in my case.

Regards,
BKR.

 

how do you want the lenses to be better?
if you're looking for thinner, you're almost at the top for lens thinnest, I can only think of 1.90 glass being thinner. as far as the optics are concerned that is a matter of preference. Glass as a material has the best optics and therefore you'd see the best out of it. But as many people will say here, that its thick, too thick for your Rx and it weighs a ton. So cosmetically and practically it is the the worst for you. Now if you had no Rx and wanted some premium sunglasses, I doubt anyone here would recommend any other material over polarized glass.
Polycarbonate and Trivex are nearly the same in weight and thinnest, you may not see the difference in the materials cosmetically but of course Trivex has similar optics to CR39(basic optical plastic) but they are both thicker than high index. the high index 1.80 is likely the thinnest lens offered in the business you made you purchase. so its really a matter of preference do you want thinner lenses or better optics. Btw, the higher the index the heavier the material by volume.