BACKGROUNDGlaucoma is the second leading cause of blindness worldwide. Intraocular Pressure (IOP) is the only known modifiable risk factor that has been shown to delay progression in both ocular hypertension and glaucoma patients. Clinical measurement of IOP has undergone several technical advances from the initial digital tension measurements, through indentation tonometry, to applanation tonometry and non-contact tonometry. This study was done to compare the intraocular pressure (IOP) measurements with Non Contact Tonometry (NCT) and Goldmann Applanation tonometry (GAT) and to compare NCT IOP and GAT IOP among various central corneal thickness (CCT) groups.