This Article  • References  • Full text PDF  • Reply to article  • Send to a friend  • Save in My Folder  • Save to citation manager  • Permissions  Citing Articles  • Citation map  • Citing articles on HighWire  • Contact me when this article is cited  Related Content  • Similar articles in this journal  Social Bookmarking   What's this?

C. E. FERREE, Ph.D.; G. RAND, Ph.D.; E. F. LEWIS, A.B.

Arch Ophthal. 1935;13(2):212-226.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

In any consideration of the effect of an increase in the intensity of light on the visibility of objects the following principles should be borne in mind. Roughly speaking, objects are seen because of their size and their difference from the background. With a given physical difference from the background, i. e., a given difference in the coefficient of reflection, the apparent or sensation difference increases rapidly with an increase in the intensity of light. This difference is greater in the case of white on black or light objects on a dark background than for black on white or dark objects on a light background. Whether there is also an effect on the apparent size of the object has not yet been fully determined. It is well known that an increase in the size of the object functions in some unknown relation as an increase of brightness, but the converse . . . [Full Text PDF of this Article]

Author Affiliations
BALTIMORE

From the Research Laboratory of Physiological Optics, Wilmer Ophthalmological Institute, Johns Hopkins Medical School.

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter     What's this?