Documenta Ophthalmologica Proceedings Series 39. Colour Vision Deficiencies VII

Documenta Ophthalmologica—Advances in Ophthalmology

This is a collection of eight papers. G. Wald of New York writes an obituary notice in English on Professor Selig Hecht. A. v. Tschermak-Seysenegg of Prague writes on Simultaneous Contrast in German with a short summary in English. Next W. Bronkhorst of Bilthoven, J. Ten Doesschate and P. F. Fischer of Utrecht discuss the Physiological Optics of the Visualization of X-ray Pictures in English wi...

Molecular genetics of colour vision deficiencies.

Common variation in colour vision exists among both colour normal and colour deficient subjects. Differences at a few amino acid positions that influence the spectra of the L and M cone pigments account for most of this variation. The genes encoding the L and M photopigments are arranged in head-to-tail arrays on the X-chromosome, beginning with the L and followed by one or more M pigment genes...

Colour vision deficiencies in Alzheimer's disease.

OBJECTIVE visual disorders are among the earliest symptoms of Alzheimer's disease. It is, however, still controversial as to whether Alzheimer's disease impairs colour vision. In this study, colour vision of Alzheimer's disease patients was tested using the Ishihara test and the PV-16 choice test. The latter test, primarily designed for children, was chosen in order to avoid problems due to cog...

Colour-Vision and Colour-Blindness

Colour vision

The immense range of colours that we see belies the relative simplicity of the system underlying colour vision. We see colours because each of the three distinct types of cone photoreceptor in our retinae is sensitive to a different range of wavelengths of light. The L, M and S cones, colloquially called red (R), green (G), and blue (B), are selective for long, middle and short wavelengths, res...