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METHODS : Forty - three Caucasian patients with primary open - angle glaucoma or ocular hypertension with a mean ( + / - SD ) age of 63 ( + / - 8 ) years were randomized and crossed over in a double - masked manner to 14 days of treatment with placebo ( morning and evening in both eyes ) , timolol solution ( morning and evening in both eyes ) , or timolol gellan ( morning in both eyes with placebo in the evening ) .
 Disease: open - angle glaucoma; Disease: ocular hypertension; Chemical: timolol; Chemical: timolol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: open - angle glaucoma; Disease: ocular hypertension; Chemical: timolol; Chemical: timolol