**Core Concept**
The corneal epithelium is a thin layer of stratified squamous epithelial cells that forms the outermost layer of the cornea, the transparent, dome-shaped surface at the front of the eye. The corneal epithelium plays a crucial role in maintaining corneal transparency and protecting the eye from external damage.

**Why the Correct Answer is Right**
The correct answer is Stratified Squamous Epithelium. This is because the corneal epithelium is composed of multiple layers of flat, plate-like cells that are tightly packed together to provide a smooth, transparent surface. The stratified squamous epithelium of the cornea is supported by a basement membrane, which separates it from the underlying stroma.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Stratified Cuboidal Epithelium is typically found in glands and ducts, where it secretes substances onto the surface of the epithelium.

**Option B:** This option is incorrect because Pseudostratified Columnar Epithelium is typically found in the respiratory and urinary tracts, where it lines the airways and renal pelvis.

**Option C:** This option is incorrect because Simple Cuboidal Epithelium is typically found in glands and ducts, where it secretes substances onto the surface of the epithelium.

**Clinical Pearl / High-Yield Fact**
The corneal epithelium is the most rapidly renewing tissue in the human body, with a turnover time of approximately 7-10 days. This high rate of cell turnover is essential for maintaining corneal transparency and preventing damage from external factors.

**Correct Answer: D. Stratified Squamous Epithelium**