[Skip to Navigation]
Access to paid content on this site is currently suspended due to excessive activity being detected from your IP address 34.234.223.227. Please contact the publisher to request reinstatement.
Article
June 1939

INSTRUMENTS AND TECHNICS FOR THE CLINICAL TESTING OF LIGHT SENSE: I. REVIEW OF THE RECENT LITERATURE

Author Affiliations

BALTIMORE
From the Wilmer Ophthalmological Institute of the Johns Hopkins University and Hospital.

Arch Ophthalmol. 1939;21(6):913-934. doi:10.1001/archopht.1939.00860060023001
Abstract

One of the most fundamental problems of physiologic optics is the study of the light sense, or achromatic sensitivity of the eye, and in particular the increase in sensitivity which occurs when the eye is exposed to darkness. The term photopic vision is used to designate the condition of the eye when exposed to bright light; scotopic vision, to designate the condition of the eye when exposed to darkness or to a very dim illumination. It is generally believed that photopic vision is dependent chiefly on the retinal cones and scotopic vision on the rods.

In the usual ophthalmologic examination the subjective tests include determination of the central visual acuity and examination of the visual fields with white and colored test objects. Study of the visual fields with white test objects is essentially a somewhat crude method of testing the light sense throughout the retina. Since, however, this and the

×