Question

causes of hypermetropia,myopia,presbyopia and astigmatism​

Answer 1

Answer:

CAUSES :::::::

HYPERMETROPIA ---------

• abnormal shape of the cornea
• low converging power of eye lens because of weak ciliary muscles

MYOPIA---------

• when the eye ball is too long and elongated
• when the eye ball becomes too curved

PRESBYOPIA---------

• when the ciliary muscles becomes weak
• eye lens becomes rigid and loses flexibility

ASTIGMATISM-----------

• error in the shape of cornea
• irregular curve of the eye lens

ALL THE BEST.....❤

Answer 2

Answer:

causes of all eye defects

exesive use of mobile and laptop and tv

solution.- stop using all of these