By: Jorge Martín HerreroBy: Jorge Martín Herrero

INDEXINDEX Introduction:Introduction:Parts of the sight:Parts of the sight:How the eye works:How the eye works:Funtions:Funtions:Photos:Photos:

INTRODUCTIONINTRODUCTIONVision occurs when light is processed by Vision occurs when light is processed by

the eye and interpreted by the brain. Light the eye and interpreted by the brain. Light passes through the transparent eye passes through the transparent eye surface (cornea). The pupil, is a opening surface (cornea). The pupil, is a opening to the eye interior. It can get larger or to the eye interior. It can get larger or smaller to regulate the amount of light smaller to regulate the amount of light entering the eye. Your sense of light lets entering the eye. Your sense of light lets you see things with your eyes. Your eyes you see things with your eyes. Your eyes can detect information abaut the shape, can detect information abaut the shape, colour and location of things aroun you.colour and location of things aroun you.

HOW THE EYE WORKSHOW THE EYE WORKS1.- Light go into the eye through the pupil. 1.- Light go into the eye through the pupil.

Then it passes through the lens.Then it passes through the lens.2.- The lens projects an upside down 2.- The lens projects an upside down

image onto the retina. The optic cells in image onto the retina. The optic cells in the retina detects the light and the the retina detects the light and the colours.Then they send nerve impulses to colours.Then they send nerve impulses to the optic nerve.the optic nerve.

PARTS OF THE SIGHTPARTS OF THE SIGHTAre 5 diferent parts of the sight:Are 5 diferent parts of the sight:The cornea: The cornea: Is a transparent layer of cells. Is a transparent layer of cells.

It covers and protects the iris and the It covers and protects the iris and the pupil.pupil.

The pupil:The pupil: Is a small hole that lets light into Is a small hole that lets light into the eye.the eye.

The lens:The lens: Is behind the pupil and iris. It Is behind the pupil and iris. It focuesesfocueses light on the retina.light on the retina.

PARTS OF THE SIGHTPARTS OF THE SIGHTThe iris:The iris: Is the coloured part of the eye, Is the coloured part of the eye,

around the pupil. It´s made of muscle around the pupil. It´s made of muscle fibres that open and close the pupil.fibres that open and close the pupil.

The retina: The retina: Has got a thin layer of optic Has got a thin layer of optic cells that detect light and colours. These cells that detect light and colours. These optic cells send information to the optic optic cells send information to the optic nerve. nerve.

FUCTIONFUCTIONThe sense of sight is that which allows The sense of sight is that which allows

man to know the half of what surrounds it, man to know the half of what surrounds it, interact with their peers. Visual images interact with their peers. Visual images provide him through the eye, information provide him through the eye, information about the color, shape, distance, position about the color, shape, distance, position and movement of objects. The receptor and movement of objects. The receptor organ is the eye.organ is the eye.

PHOTOSPHOTOS