**Core Concept**
Murphy eye is a complication associated with cataract surgery, where the posterior capsule of the lens ruptures, allowing vitreous to prolapse into the capsular bag.

**Why the Correct Answer is Right**
During cataract surgery, the posterior capsule of the lens is weakened by the surgical procedure, making it susceptible to rupture. When the posterior capsule ruptures, vitreous from the vitreous body flows into the capsular bag, causing the formation of a Murphy eye. This complication is often caused by improper technique, excessive intraocular pressure, or pre-existing posterior capsular weakness. The formation of a Murphy eye can lead to visual disturbances, including glare, halos, and decreased visual acuity.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because Murphy eye is specifically related to cataract surgery, not other types of eye surgery.
**Option B:** Incorrect because a retinal detachment is a separate condition that may occur after cataract surgery but is not the same as a Murphy eye.
**Option C:** Incorrect because a posterior capsular opacification is a common complication of cataract surgery, but it is not the same as a Murphy eye, which involves the prolapse of vitreous into the capsular bag.

**Clinical Pearl / High-Yield Fact**
A Murphy eye is a critical complication of cataract surgery that can significantly impact patient outcomes. Surgeons must be vigilant in monitoring patients post-operatively for signs of a Murphy eye and take prompt action to address the issue.

**Correct Answer: D. Cataract surgery**