Question
A 26 year old man presents to the hospital following blunt trauma to the eye. On examination the anterior chamber is deep. He has a sudden loss of vision. What is the most probable diagnosis?
| A. |
Dislocation of lens
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| B. |
Vitreous hemorrhage
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| C. |
Retinal detachment
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| D. |
Acute uveitis
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Show Answer
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Correct Answer � A
Explanation
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Answer: A. Dislocation of lens
Explanation: Blunt trauma may cause sudden compressive deformation of the globe causing transient shortening of the eye in the antero-posterior direction displacing the cornea and anterior sclera posteriorly. This causes a compensatory expansion of the globe in the equatorial plane, which can stretch or break the zonules.1 Traumatic zonular dialysis is a major cause of lens subluxation and dislocation in which partial zonular dialysis may lead to subluxation and complete zonular rupture leads to dislocation.
Beside trauma, lens dislocation is seen in hereditary disorder like congenital aniridia, congenital glaucoma, cystathionine b-synthase deficiency, Ehlers-Danlos syndrome, focal dermal hypoplasia, homocystinuria, Kniest dysplasia, Marfan’s syndrome, molybdenum cofactor deficiency, sulfite oxidase deficiency, Weill-Marchesani syndrome.
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