what is the difference between myopia and presbyopia?
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. A myopic eye forms the image of a distant object in front of its retina.
Myopia is caused by
(i) Increase in curvature of the lens
Defect of vision where an eye cannot see object clearly beyond a certain distance, through it can see nearby object clearly.
Loss of power of accommodation of the eye. It occurs in old age due to the gradual weakening of the ciliary muscles
Using concave lens.
A bi-focal lens consists of both convex and concave lenses.
Thank u :)
whenever the presbyopia is defined , it is said that in this defect person is unable to see nearby objects clearly and distinctively............... and the 2nd case appears only sometimes.
So is the difference b/w hypermetropia and presbyopia only that - we cant see nearby objects clearly in hypermetropya and in the case of presbyopia sometimes we sufer from both myopia and hypermetropia????????????
seeking 4 its ans 4rm a lng time...........