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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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