Myopia is the visual in which
the images formed before (in front
) the retina. Hypermetropia is
visual condition in which point of
image formation beyond (behind) the
retina. myopia is due to
increase in the distance the
retina and the lens, mainly
caused by slight flattening of the
. In hypermetropia the retina
too close to the lens due to
slight of the eyeball.

In the near point and far
point of vision closer (the
refractivity of crystalline lens that
corresponds the maximum distension
capacity the ciliary muscles is
enough to provide visual
). In hypermetropia the
ciliary are not able to
more to compensate the
position of the retina, .e., the near
point becomes distant.