I am not familiar with this site - but I will tell this about the eyebright herb. It by itself is the best thing for a wide variety of eye problems. I don't know what else may be added in to the Dr. C's formula that also may be helpful for the eyes - but I think you are correct in wanting the eyedrops and not the capsules. Get it directly onto the parts where it's needed the most! If no one else posts it for you, I'll try find it myself (with my computer whiz son's help) and post it here for you.
O.K - UPDATE - I found the Dr. Christopher site by myself! The extract I found is in a base of alcohol and is meant to be taken internally. We need to find your son an alcohol free version of the eyebright herb tincture that is meant to be put into the eye itself. I'll look some more in the morning and maybe some other folks will jump in here and help too.