Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 592
Fig. 2 (a).—Pupil aperture of Fig. 2 (b).—Pupil aperture of eye, wide open in the darkness eye contracted so as to shut out so as to let in as much light as excess of light, possible. Partly by the alteration of the pupil aperture, and partly also by changesthat take place in the retina, the eye…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
