All of the following can precipitate the attack of narrow angle except:
**Core Concept**
The narrow angle glaucoma is a condition characterized by increased intraocular pressure (IOP) due to the blockage of drainage angle between the iris and cornea. Various factors can precipitate an acute attack, including anatomical abnormalities, medications, and systemic conditions.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of narrow angle glaucoma. A narrow angle can be precipitated by factors that increase the risk of angle closure, such as hyperopia (farsightedness), shallow anterior chamber, or use of certain medications that dilate the pupils. One such medication is **homatropine**, which can cause pupil dilation and worsen the angle closure.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because **acetazolamide** is actually a medication used to treat glaucoma by reducing intraocular pressure. It works by inhibiting the enzyme carbonic anhydrase in the ciliary body, which reduces aqueous humor production.
* **Option B:** This option is incorrect because **pilocarpine** is a medication used to treat glaucoma by reducing intraocular pressure. It works by causing the iris to contract and increase drainage through the trabecular meshwork.
* **Option C:** This option is incorrect because **hyoscyamine** is a medication that can actually help to treat narrow angle glaucoma by causing pupil dilation, which can help to reduce the risk of angle closure.
**Clinical Pearl / High-Yield Fact**
In patients with narrow angle glaucoma, it's essential to avoid medications that can dilate the pupils, such as homatropine, and use medications that constrict the pupils, such as pilocarpine, under the guidance of an ophthalmologist.
**Correct Answer:** C.