Question

Calculate the refractive power of the cornea when it is in contact with water. The index of refraction for water is 1.33

Answer 1

Answer:-

Write the properties of cornea and lens from Table 15.1 “Parameters for the eye”.

Refractive index of cornea,  $n(c)=1.38$

Radius of curvature of lens,  $R=8 \ mm$

Calculate the refractive power of the cornea when it is in contact with water.

$P=(\frac{n(c)-n(w)}{R})$

Here , $n(w)$  is the refractive index of water, and  is the radius of curvature of crystalline lens.

Substitute 1.38 for n(c) , 1.33 for n(w) , and 0.008 m for R.

$P=(\frac{1.38-1.33}{0.008 \ m})$

$\boxed{P=6.25 \ Diopters}$