Results 221 to 230 of about 1,707,949 (259)
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Contrast Sensitivity Function for Stereopsis
Perception, 1978Contrast thresholds for stereopsis from narrow-band-filtered random-dot stereograms were compared with contrast thresholds for simple detection of similar narrow-band noise. Centre frequencies of filters were in the range 2·5–15 cycles deg−1. It was found that the contrast sensitivity function for stereopsis is similar in shape to that for detection ...
J P, Frisby, J E, Mayhew
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CONTRAST SENSITIVITY OF THE HUMAN RETINA
American journal of optometry and archives of American Academy of Optometry, 1972ABSTRACT Contrast thresholds (ΔL/L) were measured from the fovea to the far periphery at 2 degree intervals, along 12 meridians for a total of 1350 data points. The test spot, 10 minutes of are in diameter, was presented against a 0.85 m: background in the Harms perimeter.
L O, Harvey, E, Pöppel
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Effect of pterygium on contrast sensitivity
International Ophthalmology, 2013The purpose of this study is to evaluate the effect of pterygium on contrast sensitivity. Thirty-six eyes with pterygium and 18 eyes without pterygium were included in the study. The size of the pterygium was measured on the slit lamp both vertically at the limbus and categorized into three groups (≤3, 3.1 to ≤5, >5 mm), and horizontally on the cornea ...
Archana, Malik +4 more
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Contrast Sensitivity in Albinotic Patients
Optometry and Vision Science, 1983ABSTRACT Vertical and horizontal grating contrast sensitivity functions (CSF) were measured on eight albinotic patients. Several of these patients also had CSF measurements performed through their telescopic aids. For all the patients, the horizontal grating CSF was more sensitive than the vertical grating CSF. Although there are many
D S, Loshin, R A, Browning
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Contrast sensitivity in asymmetric glaucoma
International Ophthalmology, 1984We measured central contrast sensitivity in both eyes of 27 patients with asymmetric glaucomatous visual field loss or optic disc cupping. In 15 patients contrast sensitivity was less in the eye that by perimetry or ophthalmoscopy was the more severely damaged. In 10 patients contrast sensitivity was the same in the two eyes.
M A, Motolko, C D, Phelps
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Contrast Sensitivity and Functional Vision
International Ophthalmology Clinics, 2003How well does a person see faces in a crowd, read a newspaper, or drive an automobile at night? These are vital questions about a person's quality of life and safety. Obtaining answers to these questions requires tests of functional vision.
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