vision disorder

Hyperopia

The opposite of myopia, hyperopia appears when the eyeball is too short to establish an image on the cornea. As a result, there is a clearer image behind the cornea. Distant objects are clear while there is blurring close up. Contact lenses increase the ocular power, permitting clear vision of close-up objects.

Here is how the spherical contact lens corrects hyperopia:

The irregular shape of the cornea produces two focusing points of light in front of or behind the retina, resulting in blurred vision.

The toric lens corrects the refractive light and in this way creates a focal point on the retina where the vision is clear.