Values of eyes with more than 30 mm Hg of intraocular pressure. The bold figures indicate treatment with a topical β blocker and oral acetazolamide; this regimen was continued until the IOP returned to a level below 21 mm Hg. Four patients (28%) in the placebo group had an IOP above 30 mm Hg at 24 hours and three patients (21%) at 48 hours