title: Comparison of MacKay-Marg, Goldmann, and Perkins tonometers in abnormal corneas.
abstract: Intraocular pressure was determined manometrically in owl monkey eyes with normal and edematous corneas. The pressure was measured with Perkins hand-held, Goldmann, and MacKay-Marg tonometers to compare relative accuracy. At monometric levels of 20, 30, and 40 mm Hg, a statistically significant difference in readings was found between normal and edematous corneas with use of the Perkins and Goldmann applanators, whereas no such difference was found with the MacKay-Marg tonometer. The MacKay-Marg tonometer most closely approximated the true intraocular pressure in edematous corneas.
mesh_terms: D000818:Animals; D002921:Cicatrix; D003315:Cornea; D004487:Edema / Q000139:chemically induced; D005128:Eye Diseases / Q000139:chemically induced / Q000503:physiopathology; D000882:Haplorhini; D007429:Intraocular Pressure; D008365:Manometry; D012972:Sodium Hydroxide; D014065:Tonometry, Ocular / Q000295:instrumentation* / Q000592:standards
chemical_list: D012972:Sodium Hydroxide