Eyelids & the Anterior Segment:
                 Case twenty eight

This 28 year-old man complained of a decreased left vision. Two year earlier he sustained a right traumatic hyphaema after being hit with a cricket ball.

a. What does the picture show?

Traumatic cataract.

In traumatic cataract, the first lens change occurs in the posterior capsular area in the pupillary region. It usually takes the form of stellate or rosette shaped opacity. This may remains stationary or progresses slowly. However, due to its location visual symptom is common.

b. What other lens abnormalities may occur with blunt trauma?

Apart from cataract, the following changes may occur:
  • subluxation
  • dislocation
  • Vossius ring (pigmented material on the face of the lens). This is caused by the impending of the pigmented material in the pupillary circle on the anterior surface of the lens.

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