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Structure of the eye

The structure of the eye

Accommodation

Process of vision

The mechanism of vision

Regulation of the amount of light entering the eye

Light-sensitive structure of the eye

Colour blindness

Colour vision

The three primary colours

Visual disorders

Short-sightedness

Long-sightedness

Astigmatism

Correction for short-sightedness

Correction for long-sightedness

Correction for astigmatism

Structure of the ear

The structure of the ear

The mechanism of hearing

The mechanism of hearing

Intensity and frequency of sound

Structure of the organ of balance

Labyrinth

Structure of the organ of balance

Mechanism of the organ of balance

The organ of balance

Loss of balance