**Core Concept**
Vogt's triad is a set of clinical features that characterize primary angle-closure glaucoma (PACG). It consists of three key components: iris bombé, corneal edema, and mid-dilated pupil. The underlying pathophysiology involves anatomical factors such as a shallow anterior chamber and a narrow angle between the iris and the cornea.

**Why the Correct Answer is Right**
Iris bombé refers to the forward bowing of the iris, which is caused by increased pressure within the eye. This increased pressure is often due to the narrowing of the anterior chamber, leading to a decrease in aqueous humor outflow. Corneal edema results from the increased intraocular pressure (IOP) causing fluid to leak into the corneal tissue. Mid-dilated pupil is a result of the iris being pushed forward, which prevents the pupil from constricting properly.

**Why Each Wrong Option is Incorrect**
**Option A:** **Iridotomy** is actually a treatment for primary angle-closure glaucoma, not a component of Vogt's triad. Iridotomy involves creating a hole in the iris to allow aqueous humor to flow through and reduce IOP.
**Option B:** **Buphthalmos** is a characteristic of congenital glaucoma, not primary angle-closure glaucoma. Buphthalmos refers to the enlargement of the eyeball due to increased IOP.
**Option C:** **Ciliary body** is involved in the production and circulation of aqueous humor, but it is not a component of Vogt's triad.

**Clinical Pearl / High-Yield Fact**
Vogt's triad is a classic example of how anatomical abnormalities can lead to clinical manifestations. Remember that PACG often presents with a triad of iris bombé, corneal edema, and mid-dilated pupil, and that iridotomy is a key treatment option.

**Correct Answer:** B. Buphthalmos.