Final answer:
Tobramycin is the drug that can cause superficial punctate keratitis, a condition with small lesions on the cornea. It is an antibiotic with this known side effect. Viruses like herpes simplex virus 1 and Acanthamoeba infections can also result in different forms of keratitis.
Step-by-step explanation:
The drug that causes superficial punctate keratitis is d) Tobramycin. Superficial punctate keratitis (SPK) is a condition that affects the cornea, characterized by small, punctate lesions. Tobramycin, an antibiotic used to treat bacterial infections, has been known to cause SPK as a side effect when used in the eyes.
Other causes of keratitis can include viruses such as herpes simplex virus 1 which leads to a form of keratitis and it can also be caused by infections with Acanthamoeba, for which a combination of chlorhexidine and polyhexamethylene biguanide is a common treatment. Acanthamoeba infections are typically acquired through contact with contaminated water such as swimming in a lake while wearing contact lenses.