INTRAOCULAR-PRESSURE MEASUREMENT THROUGH 2 TYPES OF PIANO THERAPEUTICSOFT CONTACT-LENSES IN DOGS

Intraocular pressure (IOP) was measured by use of Mackay-Marg applanat ion tonometry in 8 normal, manometrically controlled, enucleated, cani ne eyes with and without 1 of 2 piano therapeutic soft contact lenses (1 and 2) covering the cornea. Differences were not significant betwee n measurements made without a contact lens and those made through eith er lens at manometer IOP < 30 mm of Hg. At manometer Iop greater than or equal to 30 mm of Hg, use of a contact lens tended to result in a s tatistically greater (P < 0.05) estimate of Iop than when a lens was n ot used. This difference, however, achieved only a maximum of 2.6 mm o f Hg at the 80 mm of Hg value, and was not regarded as clinically impo rtant. Measurements obtained through lens 1 were not significantly dif ferent from those obtained through lens 2. The Iop can be accurately e stimated in dogs, using the Mackay-Marg tonometer, without removing ei ther type of bandage soft contact lens, thereby avoiding potential dis ruption of an already compromised cornea.