Question

The size of an object as perceived by an eye depends primarily on

• A. actual size of the object
• B. intensity of light
• C. aperture of the pupil
• D. size of the image formed on the retina

Answer 1

Answer: (D)

size of the image formed on the retina

The perceived size of objects depends on a number of factors. Perhaps the most important of these is the visual angle subtended by the object on the retina. All other things being equal, the object that subtends the larger visual angle will appear larger. Visual angle is dependent on two factors.
1. The actual size of the object and
2. the distance the object is from the eye.