Question

Presbyopia, Retina, Near Sightedness, Far Sightedness

Answer 1

$hey \: friend \: here \: is \: your \: answer$
$prebyopia -$

PRESBYOPIA -

● presbyopia is that the defect of vision due to which an old person cannot see the nearby objects clearly due to loss of power of accommodation of eye.

● the near point of the old person having presbyopia gradually receives the become much more than 25 CM away.

● presbyopia defect is corrected in the same way as hypermetropia by using spectacles having convex lenses.

$retina -$
● the eyes and natural optical instrument. it enables us to see things around us by forming their images on the screen called the retina.

$near \: sightedness -$
● myopia( short sightedness or near sightedness) is that defect of vision due to which a person cannot see the distant objects clearly.

● the defect of eye called myopia is caused due to high converging power of eye lens and eyeball being too long.

● myopia is corrected by using spectacles containing concave lenses.

$far \: sightedness -$
● hypermetropia ( long sightedness or farsightedness) is that defect of vision due to which a person cannot see the nearby objects clearly.

● the near point of hypermetropic eye is more than 25 CM away.
● hypermetropia is corrected by using spectacles containing convex lenses.

THANKS

Answer 2

hope this helps you mate !! mark me as brainliest.


nethra15