Jul 5, 2018

[5.11]

The mode of vision of a small source of light such that the sensation is determined by illuminance at the eye rather than by its size. Point vision occurs when a source is so small that its area no longer contributes to vision. This generally means less than one minute angular subtense.

NOTE: This definition was changed in ANSI/IES RP-16-17 Addendum 4.

« Back to Definitions Index