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Document Type

Research

Abstract

During the past decade several attempts have been made to formulate equations which would explain certain visual phenomena, namely flicker fusion frequency, brightness discrimination, visual acuity, and instantaneous thresholds as functions of intensity, and light and dark adaptation as functions of time. These various equations are based on several fundamental concepts regarding the mechanism by which the visual sensation is determined. Each concept has been explained by the original author at the time the theory was proposed, but no comparison of these basic ideas has yet appeared in the literature. The purpose of the present paper is to make such a comparison available.

Publication Date

1947

Journal Title

Proceedings of the Iowa Academy of Science

Volume

54

Issue

1

First Page

325

Last Page

343

Copyright

© Copyright 1947 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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