Results 251 to 260 of about 1,072,264 (305)

Performance of video‐displayed letter charts

Australasian journal of optometry, The, 1986
A software package was developed for an Apple-II microcomputer to display Snellen letters as test charts for high speed measurement of visual acuity. With direct viewing of a 30 cm (12 inch) monitor, letter sizes can range from 6/100 to 6/6. This range can be extended by using a modified monitor to display reversed letters for indirect viewing, to ...
R. Payor
exaly   +3 more sources

Contrast Sensitivity Letter Charts as a Test of Visual Function in Amblyopia

Journal of Pediatric Ophthalmology and Strabismus, 1990
ABSTRACT Anisometropie and strabismic amblyopes were studied using the Regan Contrast Sensitivity Charts. At all levels of contrast, the amblyopic eyes of both the strabismic and anisometropic patients scored significantly lower than did their fellow normal eyes, which were used as controls. In comparing the differences between the normal and
M, Loeffler, J S, Wise, M, Gans
exaly   +4 more sources

Effect of blur and subsequent adaptation on visual acuity using letter and L andolt C charts: differences between emmetropes and myopes

Ophthalmic and Physiological Optics, 2013
Purpose: To compare the effects of defocus induced blur and blur adaptation on visual acuity and to evaluate any differences between emmetropes and myopes using letter and Landolt C logMAR charts.
Georgios A Kontadakis, Sotiris Plainis
exaly   +3 more sources

Visual Acuity and Contrast Sensitivity of the S Cone Pathway: Preliminary Measures with Letter Charts

Optometry and Vision Science, 1990
Letter charts were used to measure visual acuity and peak contrast sensitivity of the short wavelength sensitive (S cone)-pathway. The accommodative response was monitored retinoscopically.
Anthony J Adams
exaly   +2 more sources

Measurement of Glare Susceptibility Using Low‐Contrast Letter Charts

Optometry and Vision Science, 1993
ABSTRACT The Committee on Ophthalmic Procedures Assessment of the American Academy of Ophthalmology suggested either contrast sensitivity or low‐contrast visual acuity (VA) measured before and after adding a glare source as a test for assessing overall visual disability from immature cataracts.
D, Regan, D E, Giaschi, B B, Fresco
openaire   +3 more sources

THE USE OF COMPUTERIZED CONTRAST SENSITIVITY, ARDEN GRATINGS AND LOW CONTRAST LETTER CHARTS IN THE ASSESSMENT OF AMBLYOPIA

Ophthalmic and Physiological Optics, 1987
J M Woodhouse
exaly   +2 more sources

Low-Contrast Letter Charts to Detect Subtle Neuropathies

American Journal of Ophthalmology, 1988
Peter J Savino, Robert C Sergott, Thomas M Bosley   +2 more
exaly   +2 more sources

Letter: Cusum charts.

Lancet (London, England), 1974
D, Robinson, J D, Williamson
openaire   +3 more sources

Slope of psychometric functions and termination rule analysis for low contrast acuity charts

Ophthalmic & physiological optics, 2017
PURPOSE\ud \ud To assess whether the slopes of psychometric functions for measuring low contrast letter acuity were different from those for measuring high contrast letter acuity.\ud \ud METHODS\ud \ud Ten participants, wearing their best spectacle ...
Andrew Carkeet, I. Bailey
semanticscholar   +2 more sources

New Visual Acuity Charts for Clinical Research

American Journal of Ophthalmology, 1982
Frederick L Ferris, George H Bresnick, Ian Bailey   +2 more
exaly   +2 more sources