Correspondence of Tono–Pen® intraocular pressure measurements performed at the central cornea and mid-peripheral cornea

Optometric Clincial Practice Guideline. Care of the Patient with Open Angle Glaucoma: Reference Guide for Clinicians: approved by the AOA Board of Trustees March 23, 1995 (1st ed.); revised 1997, August 17, 2002 (2nd ed.). Leske, 2003, Factors for glaucoma progression and the effect of treatment: the early manifest glaucoma trial, Arch Ophthalmol, 121, 48, 10.1001/archopht.121.1.48 Kass, 2002, The Ocular Hypertension Treatment Study: a randomized trial determines that topical ocular hypotensive medications delays or prevents the onset of Primary Open-Angle Glaucoma, Arch Ophthalmol, 120, 701, 10.1001/archopht.120.6.701 1998, Comparison of glaucomatous progression between untreated patients with normal-tension glaucoma and patients with therapeutically reduced intraocular, pressures. Collaborative Normal-Tension Glaucoma Study Group, Am J Ophthalmol, 126, 487, 10.1016/S0002-9394(98)00223-2 Lleó, 2003, The relationship between central corneal thickness and Goldmann applanation tonometry, Clin Exp Optom, 86, 104, 10.1111/j.1444-0938.2003.tb03068.x Damji, 2003, Influence of corneal variables on accuracy of intraocular pressure measurement, J Glaucoma, 12, 69, 10.1097/00061198-200302000-00015 Medeiros, 2003, Corneal thickness measurements and visual function abnormalities in ocular hypertensive patients, Am J Ophthalmol, 135, 131, 10.1016/S0002-9394(02)01886-X Phillips, 2003, Central corneal thickness and measured IOP: a clinical study, Optometry, 74, 218 Argus, 1995, Ocular hypertension and central corneal thickness, Ophthalmology, 102, 1810, 10.1016/S0161-6420(95)30790-7 Chatterjee, 1997, Reduction in intraocular pressure after Excimer laser photorefractive keratectomy: Correlation with pretreatment myopia, Ophthalmology, 104, 355, 10.1016/S0161-6420(97)30308-X Ehlers, 1975, Applanation tonometry and central corneal thickness, Acta Ophthalmol (Copenh), 53, 34, 10.1111/j.1755-3768.1975.tb01135.x Emara, 1998, Correlation of intraocular pressure and central corneal thickness in normal myopic eyes and after laser in situ keratomileusis, J Cataract Refract Surg, 24, 1320, 10.1016/S0886-3350(98)80222-8 Fournier, 1998, Intraocular pressure change measures by Goldmann tonometry after laser in situ keratomileusis, J Cataract Refract Surg, 24, 905, 10.1016/S0886-3350(98)80041-2 Herndon, 1997, Central corneal thickness in normal, glaucomatous, and ocular hypertensive eyes, Arch Ophthalmol, 115, 1137, 10.1001/archopht.1997.01100160307007 Johnson, 1978, Increased corneal thickness simulating elevated intraocular pressure, Arch Ophthalmol, 96, 664, 10.1001/archopht.1978.03910050360012 Shah, 1999, Relationship between corneal thickness and measured intraocular pressure in a general ophthalmology clinic, Ophthalmology, 106, 2154, 10.1016/S0161-6420(99)90498-0 Stodtmeister, 1998, Applanation tonometry and correction according to corneal thickness, Acta Ophthalmol Scand, 76, 319, 10.1034/j.1600-0420.1998.760313.x Frenkel, 1988, Comparison of Tono-Pen to the Goldmann applanation tonometer, Arch Ophthalmol, 106, 750, 10.1001/archopht.1988.01060130820030 Azuara-Blanco, 1998, Tono-Pen determination of intraocular pressure in patients with band keratopathy or glued cornea, Br J Ophthalmol, 82, 634, 10.1136/bjo.82.6.634 Dohadwala, 1998, Positive correlation between Tono-Pen intraocular pressure and central corneal thickness, Ophthalmology, 105, 1849, 10.1016/S0161-6420(98)91029-6 Iester, 2001, New Tonopen XL: comparison with the Goldmann tonometry, Eye, 15, 52, 10.1038/eye.2001.13 Mok, 1999, Tono-Pen tonometer and corneal thickness, Eye, 13, 35, 10.1038/eye.1999.7 Gordon, 2002, The Ocular Hypertension Treatment Study: Baseline Factors that predict the Onset of Primary Open-Angle Glaucoma, Arch Ophthalmol, 120, 714, 10.1001/archopht.120.6.714 Doughty, 2000, Human corneal thickness and its impact on intraocular pressure measures: a review and meta-analysis approach, Surv Ophthalmol, 44, 367, 10.1016/S0039-6257(00)00110-7 Brandt, 2001, Central corneal thickness in the Ocular Hypertension Treatment Study (OHTS), Ophthalmology, 108, 1779, 10.1016/S0161-6420(01)00760-6 Singh, 2001, Central corneal thickness, tonometry and ocular dimensions in glaucoma and ocular hypertension, J Glaucoma, 10, 206, 10.1097/00061198-200106000-00011 Herman, 2001, Increased corneal thickness in patients with ocular hypertension, Arch Ophthalmol, 119, 334, 10.1001/archopht.119.3.334 Emara, 1999, Central corneal thickness in low-tension glaucoma, Can J Ophthalmol, 34, 319 Bron, 1999, Falsely elevated intraocular pressure due to increased central corneal thickness, Graefes Arch Clin Exp Ophthalmol, 237, 220, 10.1007/s004170050222 Khan, 1991, Comparison of Oculab Tono-Pen readings obtained from various corneal and scleral locations, Arch Ophthalmol, 109, 1444, 10.1001/archopht.1991.01080100124057 Damji, 2003, Influence of corneal variables on accuracy of intraocular pressure measurement, J Glaucoma, 12, 69, 10.1097/00061198-200302000-00015 Whitacre, 1993, Sources of error with use of Goldmann-type tonometers, Surv Ophthalmol, 38, 1, 10.1016/0039-6257(93)90053-A Schipper, 1995, Are we measuring the right intraocular pressure after excimer laser photorefractive laser keratoplasty in myopia?, Klin Monatsbl Augenheilkd, 206, 322, 10.1055/s-2008-1035452 Orssengo, 1999, Determination of the true intraocular pressure and modulus of elasticity of the human cornea in vivo, Bull Math Biology, 61, 551, 10.1006/bulm.1999.0102 Kao, 1987, Clinical comparison of the Oculab Tono–Pen to the Goldmann appla-nation tonometer, Ophthalmology, 94, 1541, 10.1016/S0161-6420(87)33249-X Rao, 2001, Clinical comparison of ocular blood flow tonometer, Tonopen, and Goldmann applanation tonometer for measuring intraocular pressure in postkeratoplasty eyes, Cornea, 20, 834, 10.1097/00003226-200111000-00011 Bandyopadhyay, 2002, Comparison of Goldmann applanation tonometry with the Tonopen for measuring intraocular pressure in a population-based glaucoma survey in rural West Bengal, Ophthalmic Epidemiol, 9, 215, 10.1076/opep.9.3.215.1518