Laser used in cutting out cataract capsule is
**Core Concept**
The question is testing the application of laser technology in ophthalmology, specifically in the context of cataract surgery. The correct answer requires knowledge of the specific laser type used for capsulotomy in cataract surgery.
**Why the Correct Answer is Right**
The Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) laser is used in ophthalmology for capsulotomy, which is the process of creating a hole in the cataract capsule to allow for vision correction. The Nd:YAG laser emits a high-energy infrared beam that is selectively absorbed by the water molecules in the lens capsule, causing it to rupture and create a hole. This procedure is typically performed after cataract surgery to remove any remaining lens material and to improve vision.
**Why Each Wrong Option is Incorrect**
**Option B:** Argon laser is commonly used in ophthalmology for photocoagulation, particularly in the treatment of diabetic retinopathy and retinal detachment. It is not used for capsulotomy.
**Option C:** DYE laser is used in various medical applications, including dermatology and cardiology, but it is not used in ophthalmology for capsulotomy.
**Option D:** Diode laser is used in ophthalmology for treatments such as glaucoma and retinal vein occlusion, but it is not used for capsulotomy.
**Clinical Pearl / High-Yield Fact**
The Nd:YAG laser is a high-energy laser that requires specialized equipment and expertise to operate safely and effectively. It is essential for ophthalmologists to be familiar with the proper use and settings of the Nd:YAG laser to avoid complications during capsulotomy.
**✓ Correct Answer: A. Nd : YAG laser**