After LASIK, IOP is reduced from 16.5 +/- 2.1 to 12.9 +/- 1.9 mmHg. There is a significant correlation between IOP and corneal curvature as well as corneal thickness.
Pressure measurements after LASIK are inaccurate because of a change in corneal biomechanics, corneal thickness and curvature and they should be corrected as follows: IOP (real) = IOP (measured) + (540 - CCT)/71 + (43 - K-value)/2.7 + 0.75 mmHg.
SOURCE: Kohlhaas M, Sporl E, Bohm AG, et al. Applanation tonometry in 'normal' patients and patients after LASIK. Klin Monatsbl Augenheilkd. 2005;222(10):823-6.
DR KEVIN: Someday soon I'll take the formula above and take the formula for determining how much the corneal thickness is reduced per diopter corrected and maybe come up with an Reduced IOP/Diopter Corrected formula. Seems like it should be a simple calculation.
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ReplyDeleteI shouldn't have said that. Now I'm feeling a lot of pressure that I talked about pressure after Lasik.
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