Question

The surface of a goggle lens are curved, even though it does not have any power why?

Answer 1

Answer:

Curvature, in which both outer and inner surfaces, have same radius, does not induce any uneven refractive power for light rays. ... This means that refraction of light will be same when passing through the transparent sheet and the light rays leaving the outer surface would remain parallel.

Answer 2

Curvature, in which both outer and inner surfaces, have same radius, does not induce any uneven refractive power for light rays. ... This means that refraction of light will be same when passing through the transparent sheet and the light rays leaving the outer surface would remain parallel.