Which of the following laser is used in LASIK
**Core Concept**
LASIK (Laser-Assisted In Situ Keratomileusis) is a type of refractive surgery used to correct vision problems such as myopia, hyperopia, and astigmatism. The procedure involves creating a thin flap in the cornea, which is then lifted to allow the underlying tissue to be reshaped using an excimer laser.
**Why the Correct Answer is Right**
The excimer laser used in LASIK is a type of ultraviolet laser that emits pulses of energy to remove microscopic amounts of tissue from the cornea. This process, known as photorefractive keratectomy (PRK), allows for precise reshaping of the cornea to improve vision. The excimer laser is highly accurate and has a high degree of precision, making it ideal for LASIK procedures.
**Why Each Wrong Option is Incorrect**
**Option A:** Argon Laser - This type of laser is often used in photocoagulation treatments for diabetic retinopathy and other retinal disorders. It is not suitable for LASIK procedures due to its lower precision and potential for damage to surrounding tissue.
**Option B:** Nd:YAG Laser - This type of laser is used in treatments such as posterior capsulotomy and laser iridotomy. It is not used in LASIK due to its ability to cause thermal damage to the cornea.
**Option C:** Diode Laser - This type of laser is often used in photocoagulation treatments for retinal disorders. It is not suitable for LASIK procedures due to its lower precision and potential for damage to surrounding tissue.
**Clinical Pearl / High-Yield Fact**
The excimer laser used in LASIK is highly accurate and has a high degree of precision, allowing for precise reshaping of the cornea to improve vision. This is due to the laser's ability to emit pulses of energy that remove microscopic amounts of tissue from the cornea without causing significant thermal damage.
**Correct Answer: C. Diode Laser**