Lens: ectopia lentis: practice question

A Ophthalmology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Ophthalmology · Lens: ectopia lentis

Sample item

A tall patient with arachnodactyly and aortic root dilatation has a lens displaced superotemporally. What is the diagnosis?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

A. Marfan syndrome

Marfan syndrome shows bilateral upward and outward subluxation with intact zonules in part, as the zonules are stretched. In homocystinuria the lens is displaced downward and inward.

Option by option

  • A. Marfan syndrome (correct)

    Correct. Superotemporal displacement with aortic involvement fits Marfan syndrome.

  • B. Weill-Marchesani syndrome

    Weill-Marchesani has short stature and spherophakia.

  • C. Homocystinuria

    Homocystinuria displaces the lens inferonasally and gives thrombosis.

  • D. Trauma

    Trauma is usually unilateral.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More Ophthalmology questions

Questions about this Ophthalmology question

What is the answer to this Ophthalmology question?

The best answer is A, Marfan syndrome. Marfan syndrome shows bilateral upward and outward subluxation with intact zonules in part, as the zonules are stretched.

Why is "Weill-Marchesani syndrome" not the answer?

Weill-Marchesani has short stature and spherophakia.

Why is "Homocystinuria" not the answer?

Homocystinuria displaces the lens inferonasally and gives thrombosis.

Why is "Trauma" not the answer?

Trauma is usually unilateral.

What concept does this question test?

It tests Lens: ectopia lentis in Ophthalmology. In homocystinuria the lens is displaced downward and inward.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Lens: ectopia lentis?

Group the red eye by what to examine and what the pupil does. Then use the flashcards and the other Ophthalmology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.