In Iridocyclitis, the pupil is: March 2004
**Core Concept**
Iridocyclitis refers to inflammation of the iris and ciliary body, which are essential components of the anterior segment of the eye. This condition can lead to various clinical manifestations, including changes in pupil appearance.
**Why the Correct Answer is Right**
In Iridocyclitis, the pupil is often constricted due to the involvement of the iris sphincter muscle and the ciliary body. The inflammation causes the iris to become edematous and fibrotic, leading to a decrease in pupil size. This is often accompanied by pain, redness, and sensitivity to light. The constriction of the pupil is a result of the increased contractility of the iris sphincter muscle, which is mediated by the parasympathetic nervous system.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Iridocyclitis typically does not cause pupil dilation. The inflammation and edema of the iris sphincter muscle would lead to constriction, not dilation.
**Option B:** This option is not relevant to Iridocyclitis. While pain is a symptom of Iridocyclitis, it is not a description of the pupil's appearance.
**Option C:** This option is incorrect because Iridocyclitis can cause a constricted pupil, not a dilated one. The inflammation and edema of the iris sphincter muscle would lead to constriction, not dilation.
**Clinical Pearl / High-Yield Fact**
A constricted pupil in the setting of Iridocyclitis is often referred to as a "constricted pupil with pain and redness," which is a classic clinical triad for this condition.
**Correct Answer:**. **Constricted.**