I'm a 32 year-old male who wears glasses occasionally (for distance, but I don't wear them while working at the computer). For the last few days, I've had mild irritation in my eyes. (The location seemed to be near the nose in the right eye, but has spread to the bottom of the right eye and now near the nose in my left.) I saw the opthamologist two days ago and he diagnosed punctate keratitis and seemed unconcerned. He gave me about 3 days worth of antibiotic drops (the name escapes me) which will be done tomorrow. I haven't noticed any improvement. If anything it seems to have gotten worse (though, admittedly, there's no blurred vision or pain, just occasional and slight burning, which may be the result of eye drops, and general irritation as if there's something in my eye that I can't get out).
When I googled the condition, the cause was incredibly unspecific (viral, bacterial, UV exposure, dry eyes, ...). The opthamologist looked at my right eye with a slit lamp and suggested UV exposure. Is it possible for him to tell the cause by looking at it, or was he making an educated guess? What concerns me is the possibility of viral (specifically herpetic) infection. (I have no rational reason to think that, but I can't get the thought out of my head.) Could that have been diagnosed with the slit lamp?
If things haven't improved, I plan to schedule a follow-up visit later in the week. Is there anything in particular I should ask when I'm there?