During the routine eye checkup, the IOP (intraocular pressure) will be measured by tonometry (NCT-non-contact tonometry) and dilated fundus examination will be done. If the IOP is found to be on the borderline or on the higher side by NCT, the IOP will be again measured again by applanation tononmetry since it is more accurate for diagnosing glaucoma. Pachymetry will be done to measure the corneal thickness. If the IOP is high associated with optic nerve damage, visual field test will be done. If this test shows defect, then glaucoma is confirmed.