**Question:** Clinical features of complicated cataract are all, EXCEPT

A. Increased intraocular pressure (IOP)
B. Uncontrolled glaucoma
C. Enlarged pupil without miosis
D. Absence of vision improvement after attempted cataract surgery

**Core Concept:**
Cataract is a clouding of the lens in the eye that can impair vision. Cataract surgery is a common procedure to restore vision. Complications can arise during or after surgery, leading to various clinical features. In this case, we are focusing on features that are not related to the surgical process or complications.

**Why the Correct Answer is Right:**
A. Increased intraocular pressure (IOP) - While cataract can lead to increased IOP due to secondary glaucoma (glaucoma associated with cataract), the correct answer is not related to the surgical aspect of complicated cataract.

B. Uncontrolled glaucoma - Uncontrolled glaucoma is a result of inadequate medical or surgical management, not a feature of complicated cataract itself.

C. Enlarged pupil without miosis - Miosis (pupil constriction) is expected after cataract surgery. An enlarged pupil without miosis is not a typical feature of complicated cataract.

D. Absence of vision improvement after attempted cataract surgery - Improved vision following cataract surgery is the primary goal. In this case, the correct answer focuses on the surgical outcome, not a feature of complicated cataract.

**Why Each Wrong Option is Incorrect:**
A. Uncontrolled glaucoma (Option B) - This is a result of inadequate management, not a feature of complicated cataract itself.

B. Enlarged pupil without miosis (Option C) - Miosis is expected post-catheter surgery. Enlarged pupil without miosis is not a typical feature of complicated cataract.

D. Absence of vision improvement after attempted cataract surgery (Option D) - This focuses on the surgical outcome, not a feature of complicated cataract. Vision improvement is not a feature of complicated cataract but a result of successful surgery.

**Clinical Pearl:**
In clinical practice, it is essential to differentiate between features related to cataract itself and those resulting from its surgical intervention or inadequate management. Understanding these differences can aid in proper diagnosis, treatment, and patient management.