Biomedical subjects

H I Zeltzer

Publications and source records attributed to H I Zeltzer.

3 recordsLinked to original sources

PubMed1988

A system for controlled presentation of the Arden contrast sensitivity test.

Contrast sensitivity has been identified as a significant index of visual function, and as an indicator of visual disorders. The Arden test of contrast sensitivity has been recognized as a simple and easily administered technique for measurement of this process. However, the customary method of administration of this test involves manual manipulation and considerable individual subjectivity. The instrument described in this report was designed and developed to minimize variability in the testing procedure due to differences in individual testing techniques, and to standardize testing conditions, ambient illumination, viewing distance and rates of presentation.

Fourier Analysis↗

PubMed1979

Use of modified X-Chrom for relief of light dazzlement and color blindness of a rod monochromat.

A young female rod monochromat is treated optometrically with binocular contact lenses to relieve light dazzlement and a monocular lens to improve hue discrimination. A comparative study of various absorption contact lenses results in treatment of both problems with modified X-Chrom. A hypothesis is offered to explain the physiological aspects of relief. This paper also describes her visual experiences from an early age, her signs and symptoms of typical rod monochromacy and the methods of diagnosis. It is a brief historical account comprised of theories and references of contributors to scientific information.

Adolescent↗

PubMed1975

A typical case study correcting color deficiency.

Within one month after visiting his optometrist, a 14-year-old color deficient vocational high school student was able to sufficiently improve his color discrimination and his perception of objects which blend with their background, so as to continue with his study in electronics. The three prescribed sessions were adequate and the student was very pleased with his color improvement.

Adolescent↗