RESULTS	Three months after initiation of therapy , baseline IOP had decreased from 23.6 + / - 1.9 mmHg to 18.3 + / - 2.8 mmHg in the group taking timolol hemihydrate ( n = 22 ) and from 23.7 + / - 2.2 mmHg to 18.4 + / - 3.1 mmHg in the group receiving timolol maleate gel ( n = 21 ) at the 24-hour trough level .\