**Core Concept**
Central nebular corneal opacity is a type of corneal scar that can result from various causes, including trauma, infection, or surgery. It is characterized by a cloudy or hazy appearance of the central cornea, which can cause visual disturbances and affect the patient's quality of life.

**Why the Correct Answer is Right**
The treatment of choice for central nebular corneal opacity is a corneal transplant, also known as penetrating keratoplasty (PK). This surgical procedure involves replacing the damaged central cornea with a healthy donor cornea. The new cornea is then sutured in place to restore clear vision. The success of PK depends on various factors, including the severity of the opacity, the patient's overall health, and the skill of the surgeon.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because central nebular corneal opacity is not typically treated with laser surgery, which is more commonly used for conditions such as refractive errors or superficial corneal scars.
**Option B:** This option is incorrect because topical medications, such as antibiotics or anti-inflammatory drops, may be used to treat the underlying cause of the opacity, but they are not effective in treating the opacity itself.
**Option C:** This option is incorrect because contact lenses may be used to correct vision in patients with central nebular corneal opacity, but they do not treat the underlying opacity.

**Clinical Pearl / High-Yield Fact**
A key aspect to remember when treating central nebular corneal opacity is that the timing of surgery is crucial. If the opacity is left untreated for too long, it can lead to further complications, such as corneal thinning or perforation.

**Correct Answer: C. Contact lenses**