In this condition, distance objects
are blurred and near objects are even fuzzier. Most farsighted people
need corrective lenses to see clearly at all distances.
the normal eye, light bends through the cornea and lens to focus
on the retina. With hyperopia (farsightedness), the eye is shorter
(or the cornea is flatter), causing light to focus beyond the
retina. The image is therefore out of focus on the retina, and
vision is blurred.
treat farsightedness, the central cornea must be made steeper.
This is accomplished by directing the laser beam to remove tissue
from around the central cornea.
For farsightedness, the peripheral
(outer) surface of the cornea will be
treated in such a way with the Excimer laser as to effectively
"steepen" the cornea in the central area. In the figure to the
right, the cornea is flattened in the yellow shaded area shown.