**Core Concept**
Zadek's procedure is a diagnostic test used to evaluate the integrity of the anterior (front) capsule of the lens in the eye, particularly in the context of cataract formation. This procedure involves the use of an ultrasonographic technique to visualize the lens capsule and detect any potential defects or tears.

**Why the Correct Answer is Right**
Zadek's procedure is performed by injecting a small amount of air or gas into the anterior chamber of the eye, which is then visualized using ultrasound to determine if there is a defect in the lens capsule. This is done to assess the integrity of the capsule and to guide further management decisions, such as cataract surgery. The procedure helps to identify any potential tears or defects in the capsule that may be contributing to cataract formation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as Zadek's procedure is specifically related to the anterior capsule of the lens, and not to the vitreous body or the posterior capsule.
**Option B:** This option is incorrect as Zadek's procedure involves the use of ultrasound to visualize the lens capsule, and not to inject a substance into the vitreous body.
**Option C:** This option is incorrect as Zadek's procedure is a diagnostic test, and not a surgical procedure to remove the lens.

**Clinical Pearl / High-Yield Fact**
Zadek's procedure is an important diagnostic tool for ophthalmologists to evaluate the integrity of the lens capsule and make informed decisions about cataract surgery. It is a key concept to remember in the diagnosis and management of cataracts.

**Correct Answer: B. Injection of air into the anterior chamber for ultrasound evaluation of the lens capsule.**