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EYE AS AN OPTICALINSTRUMENT

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Anatomy of the Eye

2

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3

Main parts of Eyes

Cornea

Aqueous Humor

Vitreous Humor

Iris

Lens

Retina

Eye muscle

Optic nerve

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4

Function of these parts of Eye

Cornea

Aqueous Humor

Vitreous Humor

Iris

Lens

Retina

Eye muscle

Optic nerve

Place ofrefraction

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5

Function of these parts of Eye

Cornea

Aqueous Humor

Vitreous Humor

Iris

Lens

Retina

Eye muscle

Optic nerve

Shape

Nutrition

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6

Function of these parts of Eye

Cornea

Aqueous Humor

Vitreous Humor

Iris

Lens

Retina

Eye muscle

Optic nerve

Shape

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Function of these parts of Eye

Cornea

Aqueous Humor

Vitreous Humor

Iris

Lens

Retina

Eye muscle

Optic nerve

Light control

Focusing

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Function of these parts of Eye

Cornea

Aqueous Humor

Vitreous Humor

Iris

Lens

Retina

Eye muscle

Optic nerve

Focusing

Accommodation

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Function of these parts of Eye

Cornea

Aqueous Humor

Vitreous Humor

Iris

Lens

Retina

Eye muscle

Optic nerve

place ofimage fall

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Function of these parts of Eye

Cornea

Aqueous Humor

Vitreous Humor

Iris

Lens

Retina

Eye muscle

Optic nerve

Eye movement,Convergence

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Function of these parts of Eye

Cornea

Aqueous Humor

Vitreous Humor

Iris

Lens

Retina

Eye muscle

Optic nerve

Nervesignals to

brain

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How many people in the classare wearing glasses?

Do you know the reasons?

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- Ageing orinherited defect may cause

eye defects.

- Eye defects include :

Far-Sighted (Myopia)

astigmatismcataractcolour blindness

Sightedness (Hipermetropia)

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- Cannot see distant objects

clearly

- Can see near objects clearlymyopia

light

from

distant object

light isfocused

in front

ofthe

retina

light

from

near object

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Cause ofmyopia

lens is toothick

eyeball

is toolong

or

p.84

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solution formyopia

person with

myopia

after

Wear glasses

lightfrom

distant

object

Wearglasses with

concave lens

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light

from

near object

lightfrom

distant

object- Cannot see near objects

clearly

- Can see distant objects clearlyhypermetropia

light isfocused

behind

the

retina

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p.84Cause ofhypermetropia

lens is too

thin

eyeballis too

short

or

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Wearglasses with

convex lens

lightfrom

near

object

after

Wear glasses

person with

hypermetropia

solution forhypermetropia

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Look at the centre with one eye. Note

whethersome lines look more blurry. If

they do, you may have astigmatism.

Do you have

astigmatism?

Testing method:

p.85

You should consult an eye

doctor.

E d i

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22

Eye deceit

Please check!!!!!

Are all lines parallel?

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23

What is the color of intersect point???

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This Is a Bunny/duck Illusion Do You See

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This Is a Bunny/duck Illusion. Do You See

the Bunny and the Duck?

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Do You See a Vase, or Something More?

This Is a Dancing Elephant

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This Is a Dancing Elephant.

How Many Feet and Legs Does It Have?

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