twenty-four patients with bilateral chronic open-angle glaucoma received three treatments : ( 1 ) artificial tears ( control ) in both eyes , ( 2 ) artificial tears in one eye and one drop of timolol ( 0.05 % ) in the other , and ( 3 ) artificial tears in one eye and one drop of betaxolol ( 0.05 % ) in the other .
C0339573
chronic open-angle glaucoma
C0015392
eye