Type of laser used for iridotomy ?
**Core Concept**
The **Nd:YAG laser** is commonly used for creating iridotomy, a surgical procedure that involves making a hole in the iris to treat or prevent conditions like angle-closure glaucoma. This procedure relies on the principle of photodisruption, where the laser energy breaks down tissue. The **neodymium-doped yttrium aluminum garnet (Nd:YAG) laser** emits infrared light at a wavelength of 1064 nanometers.
**Why the Correct Answer is Right**
The **Nd:YAG laser** is preferred for iridotomy due to its ability to photodisrupt the iris tissue without generating significant heat, thereby minimizing damage to surrounding structures. The laser's infrared wavelength allows it to penetrate the iris and create a clean hole. This procedure is crucial for equalizing the pressure between the anterior and posterior chambers of the eye.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specified.
**Option B:** Incorrect because it is not specified.
**Option C:** Incorrect because it is not specified, but typically, other types of lasers like **Argon lasers** are used for different ophthalmic procedures.
**Clinical Pearl / High-Yield Fact**
Remember, the **Nd:YAG laser** is specifically used for posterior capsulotomy and iridotomy due to its photodisruptive capabilities. This is a key point in ophthalmology, as the wrong type of laser could lead to inadequate treatment or complications.
**Correct Answer:** D. Nd:YAG laser.