Nystagmus: types: 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 · Nystagmus: types

Sample item

A child with absent iris pigment, foveal hypoplasia and fine pendular nystagmus has which diagnosis?

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

The answer and the reasoning

C. Ocular albinism

Albinism causes iris transillumination, foveal hypoplasia, misrouting of optic nerve fibres and nystagmus. Vision is typically reduced to 6/60 or better and refractive correction helps.

Option by option

  • A. Leber amaurosis

    Leber amaurosis has a flat ERG.

  • B. Retinitis pigmentosa

    Retinitis pigmentosa has night blindness and bone spicules.

  • C. Ocular albinism (correct)

    Correct. This constellation indicates albinism.

  • D. Aniridia

    Aniridia shows absent iris and foveal hypoplasia but iris tissue is lacking altogether.

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 C, Ocular albinism. Albinism causes iris transillumination, foveal hypoplasia, misrouting of optic nerve fibres and nystagmus.

Why is "Leber amaurosis" not the answer?

Leber amaurosis has a flat ERG.

Why is "Retinitis pigmentosa" not the answer?

Retinitis pigmentosa has night blindness and bone spicules.

Why is "Aniridia" not the answer?

Aniridia shows absent iris and foveal hypoplasia but iris tissue is lacking altogether.

What concept does this question test?

It tests Nystagmus: types in Ophthalmology. Vision is typically reduced to 6/60 or better and refractive correction helps.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. 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 Nystagmus: types?

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.