Blurred eye vision can be caused by a variety of eye diseases. Some eye diseases can be treated with eye drops. For example, in bacterial keratitis, eye drops such as oxyfloxacin eye drops, levofloxacin eye drops and tobramycin eye drops can be used, usually 1 drop 4 times a day, or every 2 hours if the condition is severe; if the keratitis is caused by a viral infection, antiviral eye drops such as acyclovir eye drops and ganciclovir eye gel are used. Some types of viral keratitis need to be treated with hormones, such as Bactrim eye drops. In addition, eye medications that promote corneal repair, such as recombinant bovine basic fibroblast growth factor and calf blood deprotein extract ophthalmic gel, can also be used in conjunction with keratitis.