Question

In daylight, the diameter of the iris is about 3 mm.

PART A
What is the angle between two distant point objects that can just be resolved? Assume the light's wavelength in air is 600 nm and the index of refraction inside the eye is 1.33.

PART B
What is the distance on the retina, 24 mm from the front of the eye, between the images of these two objects?

Answer 1

a) Angular resolution (in radians) = 1.22 (lambda)/(N D)
N is the index of refraction inside the eye. Lambda is the wavelength.

b) Multiply tha angle (in radians) from (a) by the distance to the retina, 24 mm, which is the eye lens's focal length.