Ocular hypertension is defined as 3 separate measurements of the intraocular pressure greater than 22 mm/Hg in the absence of visual field loss. Glaucoma is defined as the presence of a characteristic field defect (Bjerrum scotoma, nasal step or arcuate scotomas) with intraocular pressures greater than 22 mm/Hg measured sometime during a diurnal curve testing.