**Core Concept**
The question is testing the ability to identify an organism that can penetrate a normal, intact cornea. This is a critical concept in ophthalmology, as it determines the potential for an infection to spread and cause vision loss. The key is understanding the virulence and pathogenicity of different microorganisms.

**Why the Correct Answer is Right**
The correct answer is Pseudomonas aeruginosa, which is a highly virulent bacterium known for its ability to penetrate a normal cornea. This is due to its ability to produce a mucoid biofilm, which allows it to adhere to and colonize the corneal surface. Pseudomonas aeruginosa can cause severe keratitis, especially in contact lens wearers. The pathogenesis involves the production of exotoxins and proteases, which damage the corneal tissue.

**Why Each Wrong Option is Incorrect**
**Option A:** Staphylococcus aureus is a common cause of blepharitis and conjunctivitis, but it is less likely to penetrate a normal cornea.
**Option B:** Neisseria gonorrhoeae is a highly virulent bacterium that can cause severe conjunctivitis, but it typically requires some degree of corneal compromise to penetrate.
**Option C:** Herpes simplex virus (HSV) is a common cause of dendritic keratitis, but it typically requires some degree of corneal compromise or immune suppression to penetrate a normal cornea.

**Clinical Pearl / High-Yield Fact**
Remember that Pseudomonas aeruginosa is a common cause of contact lens-related keratitis, and prompt treatment is essential to prevent vision loss.

**Correct Answer:** C. Pseudomonas aeruginosa