[Long-term treatment of chronic glaucoma with timolol drops: results after four years (author's transl)].

Thirty patients with chronic glaucoma or chronic ocular hypertension were administered Timolol drops for thirty-eight to forty-nine months. Twenty four eyes had their intra-ocular pressure controlled with Timolol alone, during this period, and eighteen eyes with additional treatment (cholinergic agents or sulfonamides). In two cases, temporary superficial punctate keratopathy developed.