Types of vision

Emmetropia (normal vision) occurs
when light is focused on the retina.
This helps maintain sharp vision.

Myopia (nearsightedness) occurs
when light focuses in front of the
retina. Distant objects appear blurry.

Hyperopia (farsightedness) occurs
when light focuses behind the retina.
Nearby objects appear blurry.

Astigmatism occurs when light
focuses in more than one place.
Both near and distant objects are
distorted.

Lasek surgery can treat myopia, hyperopia,
and astigmatism.