Comparison of intraocular pressures at different points in human’s cornea before and after laser in situ keratomileusis with tono-pen tonometer

Abstract

In order to explore the difference of intraocular pressure (IOP) at different points of cornea before and after laser in situ keratomileusis (LASIK), IOP was measured by Tono-Pen Tonometer at central cornea, pericentral cornea and limbus respectively and analyzed statistically. After LASIK, IOP was dropped significantly at central cornea and pericentral cornea (P<0.05), while no statistically significant change occurred at limbus (P>0.05). There was no statistically significant difference in IOP at different points before LASIK (F=0.110, P=0.896), but statistically significant difference was found after LASIK (F=7.375, P=0.001). It was suggested that reliable IOP after LASIK could be obtained from the limbus by Tono-Pen tonometer.

Keywords

Tono-Pen tonometer / laser in situ keratomileusis / cornea / intraocular pressure

References

[1] DiraniM., CouperT., YavJ., et al.. Long-term refractive outcomes and stability after excimer laser surgery for myopia. J Cataract Refract Surg, 2010, 36(10): 1709-1717

[2] YuenL.H., ChanW.K., KohJ., et al.. A 10-year prospective audit of LASIK outcomes for myopia in 37 932 eyes at a single institution in Asia. Ophthalmology, 2010, 117(6): 1236-1244

[3] ZalenteinW.N., TervoT.M., HolopainenJ.M.. Seven-year follow-up of LASIK for myopia. J Refract Surg, 2009, 25(3): 312-318

[4] ChenM.C., LeeN., BourlaN., et al.. Corneal biomechanical measurements before and after laser in situ keratomileusis. J Cataract Refract Surg, 2008, 134(11): 1886-1891

[5] ShemeshG., ManO., MichaeliA., et al.. Pressure phosphere tonometry versus Goldmann applanation tonometry for measuring intraocular pressure before and after LASIK. J Refract Surg, 2007, 23(4): 405-409

[6] HsuS.Y., HsuY.C., TsaiR.K., et al.. Intraocular pressure change after laser in situ keratomileusis (LASIK). Kaohsiung J Med Sci, 2005, 21(4): 149-151

[7] ArimotoA., ShimizuK., ShojiN., et al.. Underestimation of intraocular pressure in eyes after laser in situ keratomileusis. Jpn J Ophthalmol, 2002, 46(6): 645-649

[8] BurvenichH., SalletG., DeClercQ. J., et al.. The correlation between IOP measurement, central corneal thickness and corneal curvature. Bull Soc Belge Ophthalmol, 2000, 276(8): 23-26

[9] ChatterjeeA., ShahS., BessantD.A., et al.. Reduction in intraocular pressure after excimer laser photorefractive keratectomy; correlation with pretreatment myopia. Ophthalmology, 1997, 104(3): 355-359

[10] EmaraB., ProbstL.E., TingeyD.P., et al.. Correlation of intraocular pressure and central corneal thickness in normal myopic eyes and after laser in situ keratomileusis. J Cataract Refract Surg, 1998, 24(10): 1320-1325

[11] ZhangY., ZhaoJ.L., BianA.L., et al.. Effect of central corneal thickness and corneal curvature on measurement of intraocular pressure with Goldman applanation tonometer and non-cantact tonometer. Zhonghua Yan Ke Za Zhi (Chinese), 2009, 45(8): 713-718

[12] FaschingerC., MossbockG.. Myopia and glaucoma. Wien Med Wochen Schr, 2007, 157(7–8): 173-177

[13] MayamaC., SuzukiY., ArairM., et al.. Myopia and advanced-stage open-angle glaucoma. Ophthalmology, 2002, 109(11): 2072-2077

[14] WangT., KleinB., KleinR., et al.. Refractive errors, intraocular pressure, and glaucoma in a white population. Ophthalmology, 2003, 110(7): 211-217

[15] ShaikhN.M., SheikhS., SinghK., et al.. Progression to end-stage glaucoma after laser in situ keratomileusis. J Cataract Refract Surg, 2002, 28(2): 356-359

[16] BushleyD.M., ParmleyV.C., PaglenP.. Visual field defect associated with laser in situ keratomileusis. Am J Ophthalmol, 2000, 129(5): 668-671

[17] BashfordK.P., ShafranovG., TauberS., et al.. Considerations of glaucoma in patients undergoing corneal refractive surgery. Surv Ophthalmol, 2005, 50(3): 245-251

[18] PeposeJ.S., FeigenbaumS.K., QaziM.A., et al.. Changes in corneal biomechanics and intraocular pressure following LASIK using static dynamic and noncontact tonometry. Am J Ophthalmol, 2007, 143(1): 39-47

[19] AugustoA.B., TaheraK.B., AbdulR.S., et al.. Tono-pen determination of intraocular pressure in patients with band keratopathy or glued cornea. Br J Ophthalmol, 1998, 8(2): 634-636

[20] LasseckJ., JehleT., FeltgenN., et al.. Comparison of intraocular tonometry using three different non-invasive tonometers in children. Graefes Arch Clin Exp Ophthalmol, 2008, 246(10): 1463-1466

[21] LiX.Y., LiJ., LiuL., et al.. Comparison of intraocular pressures at different points of human’s cornea with Tono-pen tonometer. Guoji Yanke Zazhi (Chinese), 2008, 1: 76-77

[22] KohlhasM., SpoerlE., BoehmA.G., et al.. A correction formula for the real intraocular pressure after LASIK for the correction of myopic astigmatism. J Refract Surg, 2006, 22(3): 263-267

[23] YaziciA., SenE., OzdalP., et al.. Factors affecting intraocular pressure measured by noncontact tonometer. Eur J Ophthalmol, 2009, 19(1): 61-65

[24] ReitsamerH.A., KielJ.W., HarrisonJ.M., et al.. Tonopen measurement of intraocular pressure in mice. Exp Eye Res, 2004, 78(4): 799-804

[25] PangI.H., WangW.H., MillarJ.C., et al.. Measurement of mouse intraocular pressure with the Tono-Pen. Exp Eye Res, 2005, 81(3): 359-360

[26] ChiharaE.. Assessment of true intraocular pressure: the gap between theory and practical data. Surv Ophthalmol, 2008, 53(3): 203-218