Which iris nodules are found closer to the pupillary margin?

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Study for the NBEO Ocular Disease Part 1 Test. Use flashcards and multiple choice questions, each with hints and explanations, to prepare for your exam! Get ready for your success!

Multiple Choice

Which iris nodules are found closer to the pupillary margin?

Explanation:
In iris nodules, location relative to the pupil helps identify the type. Koeppe nodules form right at the pupillary margin—the edge of the iris where it meets the pupil—so they’re the closest nodules to the pupil. Busacca nodules sit on the anterior surface of the iris but away from the pupil (on the iris stroma), not at the margin. Lisch nodules are pigmented iris hamartomas seen in neurofibromatosis and are not inflammatory nodules at the iris margin. Keratic precipitates are deposits on the cornea’s endothelium, not iris nodules. So the nodules closest to the pupil are Koeppe nodules.

In iris nodules, location relative to the pupil helps identify the type. Koeppe nodules form right at the pupillary margin—the edge of the iris where it meets the pupil—so they’re the closest nodules to the pupil. Busacca nodules sit on the anterior surface of the iris but away from the pupil (on the iris stroma), not at the margin. Lisch nodules are pigmented iris hamartomas seen in neurofibromatosis and are not inflammatory nodules at the iris margin. Keratic precipitates are deposits on the cornea’s endothelium, not iris nodules. So the nodules closest to the pupil are Koeppe nodules.

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