What term corresponds to movement of the lens known as a 'lens dance'?

What term corresponds to movement of the lens known as a 'lens dance'?

• A. Phacodenesis
• B. Iris bombe
• C. Panuveitis
• D. Aphakia

Answer: (A)

Phacodonesis is the tremulous movement of the crystalline lens caused by weakness or rupture of the zonular fibers, so the lens can appear to wobble or dance with eye movements. This phenomenon reflects unstable lens support and is a clue to zonular laxity or subluxation, often seen in conditions like Marfan syndrome, homocystinuria, trauma, or after previous intraocular surgery. On examination, you may notice the lens trembling when the patient shifts gaze or when the pupil is dilated and the eye is moved. Iris bombe describes forward bowing of the iris from posterior synechiae and angle-closure mechanisms, not lens movement. Panuveitis is inflammation of the entire uveal tract, and aphakia is the absence of the lens.

Phacodonesis is the tremulous movement of the crystalline lens caused by weakness or rupture of the zonular fibers, so the lens can appear to wobble or dance with eye movements. This phenomenon reflects unstable lens support and is a clue to zonular laxity or subluxation, often seen in conditions like Marfan syndrome, homocystinuria, trauma, or after previous intraocular surgery. On examination, you may notice the lens trembling when the patient shifts gaze or when the pupil is dilated and the eye is moved.

Iris bombe describes forward bowing of the iris from posterior synechiae and angle-closure mechanisms, not lens movement. Panuveitis is inflammation of the entire uveal tract, and aphakia is the absence of the lens.