Gift of the Creator Gives us the sense of sight 70% of all sensory receptors are in the eye Spheroid structure, about 2/3 the size of aping-pong ball Functions: distinguishes light and dark,shape, colour, brightness & distance ofobjects.
Includes : bony orbit, eyelids, eyelashes,tears and fat glands, extra ocularmuscles, conjunctiva
Most of the eye is enclosed in a bony orbit Structure:o Cheekboneo Foreheado Templeo Side of nose Function:Provides protection to the eye
A thin fold of skin that covers the eye Protect eye from foreign matter (dust, dirt, debris) Protect against bright light that might damage theeye Lubricate the eye surface by distributing tears overthe corneaUppereyelidLower eyelid
Are the hairs that growat the edge of eyelids Protect the eye byfiltering out foreignmatter
A thin, clear layer of skin Lines the inner surface of eyelids &covers the front surface of the eyeball except the cornea Secretes mucus to lubricate the eye Keeps bacteria and foreignmaterial from getting behind eye
Innermost, sensitive layer of the eye A delicate membrane containingphotoreceptors & associatedneurons
A clear, watery fluid in the anteriorchamber Nourishes the lens & cornea and helpsrefract light onto the retina
A clear, gel-like fluid in the posteriorchamber Supports the lens & retina and keepsthe eye from collapsing Aids the magnifying power of the eye
Light rays coming from object enterthrough the cornea, progress throughpupil & fall on eye lens which convertslight rays & produces a real & invertedimage of object on retina. The imagethus formed is conveyed to brain by opticnerve in the form of electrical signalswhich are seen by the brain as a visualimage.