Angle of view

The perceived size of an object depends on the size of the image projected onto the retina. The size of the image depends on the angle of vision. A near and a far object can appear the same size if their edges produce the same angle of vision. With an optical device such as glasses or binoculars, microscopeand telescope the angle of vision can be widened so that the object appears larger, which is favourable for the resolving power of the eye.