A 32-year-old contact lens wearer presents to the emergency department with eye pain, redness, and photophobia in her right eye. She reports sleeping in her contact lenses for the past week. On examination, you notice a small, grayish-white lesion on her cornea. What is the most likely diagnosis?
Herpes simplex keratitis
Fungal keratitis
Bacterial keratitis
Corneal abrasion