name the eyes defects - Biology - Health and hygiene

Question

name the eyes defects???

Saman Ahmad · Accepted Answer

Major defects of vision are as
follows:

1 Myopia (short
sightedness)

Myopia
is a defect of vision in which a
person clearly sees all the nearby objects, but is unable to see
the distant objects comfortably and his eye is known as a myopic
eye

2 Hypermetropia (Long
sightedness)

Hypermetropia
is a defect of vision in which a
person can see distant objects clearly and distinctively, but is
not able to see nearby objects comfortably and
clearly

3 Presbyopia (Ageing vision
defect)

Presbyopia is a common defect of
vision, which generally occurs at old age A person suffering from
this type of defect of vision cannot see nearby objects clearly and
distinctively A presbyopic eye has its near point greater than 25
cm and it gradually increases as the eye becomes
older

4
Cataract

It is also one of the eye
defects found commonly in people of older ages In this defect, the
crystalline lens becomes milky and cloudy This condition is also
known as cataract
This causes partial or complete
loss of vision This loss of vision can be restored by removing the
cataract by means of a cataract surgery The use of any kind of
spectacle lenses does not provide any help against this defect of
vision