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Results for “Vision, Low”

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At least 487 records · Page 27Linked to original sources
PubMed1981

Reading performance in low vision patients: relation to contrast and contrast sensitivity.

Closed circuit television (CCTV) systems have proven useful in professional and recreational rehabilitation of the partially sighted. However, the parameters for optimum performance on such systems have not been examined. This investigation shows that contrast is an important parameter in CCTV reading performance; for many patients, even slight contrast reductions significantly reduce reading performance. Distance acuity is not a good predictor of CCTV reading performance, nor is performance on conventional contrast sensitivity measures. However, a commercially available test for contrast sensitivity (the Arden plates) may be useful for predicting CCTV reading performance.

Aged↗
PubMed1983

A confrontation test of visual fields in the low-vision patient.

We report a simple method for measuring the extent of the visual field in patients from whom this measurement is difficult. One Maddox rod is used before the eye under test. Through the Maddox rod lens, this eye sees a white streak produced by a penlight. While fixating this white streak another penlight is brought into the field of view from the periphery. The patient is required to report only whether he sees one or two light streaks. The results correlate well with field measurements made on the tangent screen in patients with simulated field losses.

Humans↗
PubMed1985

Contrast sensitivity function as a diagnostic tool in low vision.

In this case report, a patient's visual loss associated with both cataract and senile macular degeneration is described. The contrast sensitivity function (CSF) as well as Retinometer and Visometer findings indicate that the additional visual loss over a year's time was lenticular, rather than retinal, in origin.

Aged↗
PubMedDate not supplied

Low-vision aids.

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Child↗