Colour vision deficiency

Colour vision deficiency

The inability to differentiate certain shades of colour is called colour vision deficiency.

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Saistītie vienumi

The human eye

The eye is one of our most important sense organs. When stimulated by light, electric impulses are produced by its receptors.

The mechanism of vision

The curvature of the lens of the eye changes when we look at a distant or at a near object, to ensure a sharp image.

Vision correction

Concave and convex lenses are used for the correction of short-sightedness and far-sightedness.

Diversity of light-detecting organs

Several analogous types of eyes have developed independently through convergent evolution.

How does it work? - LCD screens

A liquid-crystal display utilises the light modulating properties of liquid crystals.

How does it work? - Plasma display television

This animation explains how a plasma display television works.

Nervous system

The central nervous system consists of the brain and the spinal cord, the peripheral nervous system consists of nerves and ganglia.

Synaptic transmission

Neurons transmit electrical signals via chemical and electrical synapses.

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