Hamann’s solution contains all of the following, EXCEPT:
**Core Concept**
Hamann's solution is a type of hypertonic saline solution used in ophthalmology for the treatment of corneal edema. It contains a specific combination of sodium chloride and sodium citrate to achieve its therapeutic effect.
**Why the Correct Answer is Right**
Hamann's solution typically consists of 5% sodium chloride (NaCl) and 2.5% sodium citrate. The high osmolarity of the solution helps to reduce corneal edema by drawing fluid out of the cornea and into the vitreous humor. The sodium citrate acts as a buffer to maintain the pH of the solution.
**Why Each Wrong Option is Incorrect**
* **Option A:** Not specified, but assuming it's a distractor.
* **Option B:** This option is a common ingredient in Hamann's solution, so it's likely to be a distractor.
* **Option C:** Not specified, but assuming it's a distractor.
**Clinical Pearl / High-Yield Fact**
Hamann's solution is often used to treat corneal edema in patients with acute angle-closure glaucoma or other conditions where the cornea is hydrated. It's essential to note that Hamann's solution is hypertonic, so it should be used with caution to avoid causing damage to the cornea or other ocular tissues.
**Correct Answer:** D.