Parts of the Eyes

Sense Organs

Eyes

Eyes is used for

seeing.

Parts of the Eyes

Parts:

1. Cornea

2. Iris
3. Lens
4. Retina

5. Optic Nerve

Eyelids

Protects the eyes

from dust.

Iris

The Colored part

of the eyes.

Pupil

The opening in the
center of the eye.

Light enters the
eye through the

pupil.

Pupil

Regulates the
amount of light
that enters the

eye.

Cornea

Clear covering in
front of the eye.
Cornea allows

light to pass

through the pupil.

Lens

From the pupil, light
passes through the

lens. The lens

focuses the image
you are looking at

on the retina.

Retina

The retina, which lies
on the inner surface
at the back of the
eye, contains the

nerve endings of the

optic nerve.

Optic Nerve

Carries the image of
the object you are

looking at to the

brain.

Common Ailments of the Eyes

1. Sore Eyes or

Conjunctivitis

2. Nearsightedness
3. Farsightedness

4. Cataract

5. Color Blindness

Sore Eyes or Conjunctivitis

1. The membrane that

covers the eyeball

and the underside of
the eyelids become

red and inflamed

because of its

frequent exposure to

dust and germs.

Sore Eyes or Conjunctivitis

At first, the eyes become

red and dry, and may

feel like they are burning.
Later, you may observe

pus and a watery

secretion. During sleep,
the pus dries and makes
the lashes stick together.

Sore Eyes or Conjunctivitis

It is a contagious

disease. It may spread to

other people , unless

proper care is taken to

avoid this kind of

ailment.

Nearsightedness

This is a condition

wherein a person can
see near objects more

clearly than distant ones.

Nearsightedness

It occurs mainly because
the shape of the eyeball
is longer and more oval

than normal.

Nearsightedness

Nearsightedness can be

corrected by wearing

eyeglasses with concave
lenses. Concave lenses

have edges that are

thicker than the middle

part.

Farsightedness

This is a condition

wherein a person can

see distant objects more

clearly than the near

ones.

Farsightedness

It occurs mainly because
the shape of the eyeball

is shorter and less oval

than normal.

Farsightedness

Farsightedness can be
corrected by wearing

convex lenses.

Cataract

This is an eye defect in

which the lens of an eye
becomes cloudy, resulting

in an unclear vision.

Cataract is quite common
among elderly. However, it

can be corrected by

replacing the defective lens

with an artificial lens.

Color Blindness

This is a condition wherein a

person cannot recognize
certain colors. Green and
red are the color shades

most confused. People who
are completely colorblind
see all colors as gray. It is

inherited.

Seatwork:
Notebook

Draw and label the parts of the eyes.