Effect of Mild to Moderate Myopic Correction by Laser-Assisted In Situ Keratomileusis on Intraocular Pressure Measurements with Goldmann Applanation Tonometer, Tono-Pen, and Pneumatonometer

Abstract

In this group of patients with mild to moderate myopia, LASIK had little or no statistically significant influence on IOP readings obtained with a Goldmann applanation tonometer, Tono-Pen, or pneumatonometer. This finding is in contrast to earlier reports of greater amounts of myopic correction, in which significant reductions in measured IOP were observed. Further study is needed to determine whether a critical amount of corneal change after LASIK is required to have a significant effect on IOP measurements.

Assessment of nerve fiber layer thickness before and after laser in situ keratomileusis using scanning laser polarimetry with variable corneal compensation

“…The magnitude of effect varies among studies. [24][25][26] The influence of LASIK on automated perimetry has not been studied; nevertheless, it is well known that it is not sensitive enough for the detection of early glaucomatous damage. 27 Scanning laser polarimetry and the other RNFL and optic nerve imaging techniques have proven to be sensitive and specific for the diagnosis of glaucoma [13][14][15] and may prove helpful in the evaluation of glaucoma suspects who have had LASIK.…”

Intraocular pressure assessment after laser in situ keratomileusis: a review

“…Vakili et al . extended the comparison to include the use of tonopen in mild to moderate myopic LASIK (mean refractive error of −5.66 D) 12 . In their study, there is no statistically significant change in IOP pre‐ and post‐LASIK when using GAT, pneumotonometry and tonopen.…”

Glaucoma and Corneal Transplant Procedures

“…Standard GAT pressures are altered after refractive surgery due to biomechanical changes in cornea [78–81]. No reliable nomograms to estimate the effects of refractive surgery on corneal dynamics and IOP exist.…”

“…No reliable nomograms to estimate the effects of refractive surgery on corneal dynamics and IOP exist. Tono-Pen and pneumotonometry are less affected by refractive surgery compared to GAT [81–84]. DCT or Ocular response analyzer (ORA) may provide more reproducible data when comparing postoperative IOP with baseline [85].…”