What is the definition or description of: eye sight?

Vision: Sight is the sum of the light receptive and integrative capacity of the eye including best vision, color vision, night vision, depth vision, field of vision and the ability to track objects in motion. An ophthalmologist can measure these and determine the function of the eye for you.

Visual acuity: Eye sight is measured as the visual acuity. The depth perception and contrast sensitivity is pat of the eye sight but is not routinely measured during an eye exam.