Defective Colour Vision: Fundamentals, Diagnosis and Management

Fundamentals of Colour Television

In recent years the colour printing of illustrations in magazines and books, and the colour film in the cinema and in amateur photography, have attained a high degree of perfection. They have, as it were, opened the general public's eyes to the world of colour. Colour !elevision has also made considerable strides, as evidenced,for example, by the regular colour television transmissions in the U...

Colour-Vision and Colour-Blindness

Colour vision testing as an aid to diagnosis and management of age related maculopathy.

AIM To provide a simple test that detects the onset of age related maculopathy (ARM), and can be used to monitor its severity. METHODS Colour contrast sensitivity was measured using computer graphics techniques. Colour thresholds were measured along tritan and protan colour confusion axes in the presence of dynamic luminance noise. Thresholds were determined separately for two sizes of optoty...

Fundamentals of Spatial Vision

The adult human eye is aproximately 25mm in diameter and weighs about 7g. The anterior section of the eye contains the eye's optical system whose major structures are the cornea, lens, and iris. The cornea provides about two-thirds of the eye's refractive power, but the lens provides ne focus for targets at distances from 20 feet down to about 4 inches (Pugh88). The ciliary muscles attached to ...

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...