**Core Concept**
Phacoemulsification is a modern cataract surgery technique where the lens is emulsified and aspirated, allowing for a minimally invasive procedure with a faster recovery time. This technique relies on the use of ultrasonic waves to break down the lens material, making it possible to remove the cataractous lens through a small incision.

**Why the Correct Answer is Right**
The correct answer is a type of ultrasonic device specifically designed for phacoemulsification. These devices use a handheld phaco probe that generates ultrasonic waves to break down the lens material. The phaco probe is connected to a phaco machine, which controls the flow of irrigation and aspiration fluids to remove the emulsified lens material. The precise control over the ultrasonic waves and fluid flow allows for a safe and effective removal of the cataractous lens.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specify a device used for phacoemulsification.
**Option B:** This option is incorrect as it does not relate to the specific device used for phacoemulsification.
**Option C:** This option is incorrect as it is not a device used for phacoemulsification.

**Clinical Pearl / High-Yield Fact**
When performing phacoemulsification, it is essential to maintain a clear understanding of the ultrasonic wave settings and fluid flow to avoid complications such as posterior capsule rupture or retinal damage.

**Correct Answer:**
Phacoemulsifier.