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Right eyes in study: mean intraocular pressure (IOP) as measured by Goldmann applanation tonometer (GAT), mean IOP as measured by air-puff tonometer (APT), and the difference (DIFF) between the two readings according to three groups of IOP values (Group 1 [G1], <12 mmHg; Group 2 [G2], 12–24 mmHg; and Group 3 [G3], >24 mmHg).
