The size of an object as perceived by an eye depends primarily on
The image of an object is formed on the retina. If the image formed on retina is small the size of
the object perceived by an eye will be small and vice – versa.
Actual size of the object and distance of the object from the eye has not are not the primary
Reason for the image perceived by an eye.
Also , aperture of the pupil controls the intensity of light