All eyeglasse frames in sllac.com can have tint lenses, including common tint, gradient tint, mirror tint lenses and polorized lens, so eyeglasses seems the same as sunglasses, is that correct?
No, here are two main difference of sunglasses and eyeglasses:
1. Sunglasses are born for tint lenses, and are more fasion, their seen area are usualy larger and more curved.
2. Sunglasses prescription range is not so wide as eyeglasses.
Sunglasses prescription sph range is -6.00 ~ +2.00 ,
Eyeglasses prescription sph range is -20.00 ~ +12.00
this is an approximate range based on the spherical (SPH) value. If you have astigmatism (CYL) in your prescription, this range may be further limited.