Chronic simple glaucoma is a common disease in old age and lowering in
traocular pressure is the treatment strategy. Although this can be ach
ieved surgically, medical treatment with eye drops is more often presc
ribed. beta-antagonists are the class of drug most often chosen, altho
ugh other medical therapies are available. Systemic absorption of beta
-antagonist eye drops can cause unsuspected respiratory impairment. Ph
ysicians should be alert to the possibility of respiratory side-effect
s of topical therapy with beta-antagonists and whenever such side-effe
cts occur should use alternative treatments.