GWEN SHOCKEY / SCIENCE PHOTO LIBRARY GWEN SHOCKEY / SCIENCE PHOTO LIBRARY
Illustration of hypertropia, a form of strabismus where there is an upward deviation of one eye. It is caused by the imbalance of the extraocular muscles and may be present at birth (congenital) or acquired. Treatment depends upon the underlying cause, but may include glasses, botox injections to the eye muscles, or surgery.
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