The mechanism of vision

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.

Biologija

Raktiniai žodžiai

Akis, Vaizdavimas, Vizija, Sensorinis organas, Regos nervas, Trumparegys, Hyperopia, Regėjimo aštrumas, Spalvotas vaizdas, Regėjimo problema, Iris, Mokinys, Objektyvas, Ciliarinis kūnas, Ragenos, Stiklakūnio kamera, Geltona lutea, Scotoma, Skleras, Choroidas, Tinklainė, Regos žievė, Priekinė kamera, Stimulas, Šviesa, kūgeliai, lazdos, Pigmentas, Receptorius, signalas, Akiniai, kontaktiniai lęšiai, žmogus, biologija

Susiję elementai

Vaizdai

Susiję elementai

The human eye

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

Vision correction

Concave and convex lenses are used for the correction of shortsightedness and farsightedness.

Diversity of light-detecting organs

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

Ausis ir klausos mechanizmas

Ausys oro vibracijas paverčia elektros signalais, kurie po to apdorojami smegenyse.

Colour vision deficiency

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

How does it work? – Cinema projector

This animation demonstrates the design and operation of a traditional cinema projector.

How does it work? - Digital camera

This animation demonstrates the structure and operation of digital cameras.

Layers of the skin; cutaneous senses

The skin is the soft outer covering of our body, its three layers are the epidermis, the dermis and the hypodermis.

Mechanism of taste reception

Taste receptors convert chemical stimuli into electric signals.

Middle ear infection, otitis media

This animation shows the symptoms and treatment of secretory otitis media.

Nose, the mechanism of smelling

Olfactory receptors produce electric signals when stimulated by odours.

Telescopes

This animation shows optical and radiotelescopes used in astronomical observation

The reflection and refraction of light

A ray of light is reflected or refracted at the boundary of two mediums with different refractive indices.

The sense of balance

The position and acceleration of the head is detected by the inner ear.

Optical instruments

A wide variety of optical instruments are in use today, ranging from microscopes to telescopes.

Optical illusion

The information gathered by the eye is misinterpreted by the brain.

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