Cornea: Roper-Hall classification: 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 · Cornea: Roper-Hall classification

Sample item

In the Roper-Hall classification of chemical injury, which finding indicates the worst prognosis (grade IV)?

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

The answer and the reasoning

B. Cornea opaque with more than half of the limbus ischaemic

Roper-Hall grades by corneal haze and extent of limbal ischaemia. Grade IV has an opaque cornea hiding iris and pupil, and more than half of limbal ischaemia, with a very poor prognosis. Grade I has epithelial damage only with no ischaemia.

Option by option

  • A. Total loss of epithelium with haze and one third to one half limbal ischaemia

    This describes grade III, a guarded prognosis.

  • B. Cornea opaque with more than half of the limbus ischaemic (correct)

    Correct. This is grade IV with the worst outlook.

  • C. Epithelial damage only with no limbal ischaemia

    This describes grade I.

  • D. Cornea hazy with iris details visible and under one third limbal ischaemia

    This describes grade II with a good prognosis.

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.

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Questions about this Ophthalmology question

What is the answer to this Ophthalmology question?

The best answer is B, Cornea opaque with more than half of the limbus ischaemic. Roper-Hall grades by corneal haze and extent of limbal ischaemia.

Why is "Total loss of epithelium with haze and one third to one half limbal i…" not the answer?

This describes grade III, a guarded prognosis.

Why is "Epithelial damage only with no limbal ischaemia" not the answer?

This describes grade I.

Why is "Cornea hazy with iris details visible and under one third limbal isch…" not the answer?

This describes grade II with a good prognosis.

What concept does this question test?

It tests Cornea: Roper-Hall classification in Ophthalmology. Grade IV has an opaque cornea hiding iris and pupil, and more than half of limbal ischaemia, with a very poor prognosis. Grade I has epithelial damage only with no ischaemia.

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 Cornea: Roper-Hall classification?

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.