1
Q
Plastic lens Refractive indices
A
CR 39
1.6
1.67
1.74
2
Q
Polycarbonate refractive index
A
1.586
3
Q
Trivex refractive index
A
1.53
4
Q
Refractive indices of glass
A
1.53
1.6
1.7
1.8
1.9
5
Q
Solutions to eyeglass allergies
A
-Titanium or stainless steel
-Hard plastic
-Non-silicone nose pads
