The optical prescription for a pair of spectacles is: Right eye: - 3.50 D Left eye: - 4.00 D (a) Are these lenses thinner at the middle or at the edges? (b) Which lens has a greater focal length? (c) Which is the weaker eye?

Question

Philoid · Accepted Answer

Right eye : - 3.5 D

Left eye : -4 D

(a) These lens are thinner at the middle

(b) Lens of lower power:- 3.50 D has a greater focal length

(c) Left eye is the weaker eye

The optical prescription for a pair of spectacles is:Right eye: - 3.50 D Left eye: - 4.00 D(a) Are these lenses thinner at the middle or at the edges?(b) Which lens has a greater focal length?(c) Which is the weaker eye?

The optical prescription for a pair of spectacles is:
Right eye: - 3.50 D Left eye: - 4.00 D

(a) Are these lenses thinner at the middle or at the edges?

(b) Which lens has a greater focal length?

(c) Which is the weaker eye?