Abstract

The threshold visibility of a series of test objects ranging from a fine line to a square was determined at two orientations, vertical and oblique. It was found that as the test objects became longer and narrower the area of the threshold objects increased. The limiting width for a fine line was 0.5 sec and for a square about 12 sec. These values are comparable to those previously reported.

© 1959 Optical Society of America

Effect of Orientation on the Visibility of Fine Wires*

John C. Ogilvie and Maurice M. Taylor
J. Opt. Soc. Am. 48(9) 628-629 (1958)

Depth-Discrimination Thresholds as a Function of Binocular Differences of Retinal Illuminance at Scotopic and Photopic Levels*

Alfred Lit
J. Opt. Soc. Am. 49(8) 746-752 (1959)

Effect of Striated Fields on Critical Flicker Frequency

Elaine H. Graham and Carney Landis
J. Opt. Soc. Am. 49(6) 580-585 (1959)

Effects of Involuntary Eye Movements on Visual Acuity*

Ulker Tulunay Keesey
J. Opt. Soc. Am. 50(8) 769-774 (1960)

Visual Effects of Varying the Extent of Compensation for Eye Movements*

Lorrin A. Riggs and S. Ülker Tulunay
J. Opt. Soc. Am. 49(8) 741-745 (1959)