Aphakia

“a-phak-i-a”

"a-":          no / with out

"phakia":  lens 

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“without a lens"

Aphakia is a medical condition characterized by an absence of a lens in the eye. The function of the lens, a clear structure located beneath the iris, is to refract and to focus light on the retina. Without a lens, a patient will develop focusing problems. Aphakia can occur as a congenital anomaly or as a result of trauma. Some people opt to remove the lens deliberately in order to treat cataracts.

People with aphakia usually present with severe hyperopia, or farsightedness. They also suffer a loss of accommodation when their eyes have trouble adjusting and focusing across different distances.

In order for a person to see clearly, light has to travel past the cornea (the front part of the eye) and through the lens in order to focus properly. 

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Aphakic Vision