Abstract
Purpose :
Compare intracameral transducer pressure with intraocular pressure (IOP) measured by a standard Goldmann applanation tonometer (GAT) prism (IOPg) and a modified correcting applanation tonometer surface Goldmann prism (IOPc) in both normal human cadaveric eyes and cadaveric eyes which underwent myopic laser in situ keratomileusis (LASIK)
Methods :
Twenty-One (21) normal cornea cadaveric eyes and Eighteen (18) cadaveric eyes which had undergone LASIK where manometrically pressurized between 5 and 50 mmHg. Paired intraocular pressure was measured sequentially at each intracameral pressure setting using both GAT (IOPg) and modified-GAT (IOPc) prisms. Four axis averaged pressure measurements with each device were completed at an intracameral pressure setting by two masked practitioners.
Results :
Mean paired IOP in LASIK eyes measured -5.43±2.84 mmHg IOPg and -2.02±2.34 mmHg by IOPc (p≤0.0001) compared to intracameral pressure. Mean paired IOP in normal eyes measured -3.10±2.51 mmHg IOPg and -1.64±2.64 mmHg by IOPc (p=0.17) compared to intracameral pressure. IOP measurement differences did not significantly vary over the IOP range or between practitioners.
Conclusions :
The modified Goldmann (IOPc) prism measured less of an IOP reduction in LASIK cadaver eyes compared to the standard (IOPg) prism. Pressure differences between IOPc and IOPg were not significant in normal cadaver eyes.
This abstract was presented at the 2023 ARVO Annual Meeting, held in New Orleans, LA, April 23-27, 2023.