Journals / Glokom Katarakt / 2008 / Cilt: 3 - Sayı: 2

The relationship between central corneal thickness and intraocular pressure measurements obtained with a dynamic contour tonometer, noncontact tonometer,tono-pen, and goldmann applanation tonometer

Dinamik kontur tonometre, nonkontakt tonometre,tonopen ve goldmann applanasyon tonometresi ile göz içi basıncı ölçümlerinin santral kornea kalınlığı ile ilişkisi

Pages
107–112
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Our findings indicate that DCT, with its potential for measuring IOP independently from CCT, will be used alongside GAT in the future.

📌 3 Key Takeaways

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Objective & Hypothesis:Purpose: To investigate the relationship between central corneal thickness (CCT) and intraocular pressure (IOP) measurements obtained with Pascal dynamic contour tonometry (DCT), noncontact tonometer (NCT), Goldmann applanation tonometry (GAT), and TONO-PEN.
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Key Findings & Data:Materials and Methods: Four hundred eighty eyes of 240 healthy individuals and ocular hypertension patients were included in the study.
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Conclusion & Impact:Our findings indicate that DCT, with its potential for measuring IOP independently from CCT, will be used alongside GAT in the future.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Kornea · Göz içi basınç · Manometri

Abstract

Purpose: To investigate the relationship between central corneal thickness (CCT) and intraocular pressure (IOP) measurements obtained with Pascal dynamic contour tonometry (DCT), noncontact tonometer (NCT), Goldmann applanation tonometry (GAT), and TONO-PEN. Materials and Methods: Four hundred eighty eyes of 240 healthy individuals and ocular hypertension patients were included in the study. After central corneal thickness (CCT) was measured in all eyes with ultrasonic pachymetry, IOP was measured with DCT, GAT, NCT and TONO-PEN, at 5-minute intervals, in random order. Correlations between IOP measurements from these tonometers and CCT were statistically analyzed. Results: In eyes with thin corneas (below 520 μm), there was no correlation between CCT and DCT measurements, while all other tonometers were influenced by CCT. In eyes with normal thickness corneas (520-580 μm), the weakest correlation with CCT and IOP measurements was seen with DCT and TONO-PEN. In eyes with thick corneas (above 580 μm) TONO-PEN had the weakest correlation with CCT, while GAT, DCT, and NCT measurements correlated with CCT. Conclusions: It should be kept in mind that CCT values might affect tonometric measurements of IOP, especially in glaucoma clinics and in patients who have undergone refractive surgery. Our findings indicate that DCT, with its potential for measuring IOP independently from CCT, will be used alongside GAT in the future.

Özet

Amaç: Pascal dinamik kontur tonometre (DKT), nonkontakt tonometre (NKT), Goldmann aplanasyon tonometresi (GAT) ve Tonopen ile göz içi basıncı (GİB) ölçümlerinin santral kornea kalınlığı (SKK) ile ilişkisini araştırmak. Gereç ve Yöntem: Çalışmaya sağlıklı bireyler ile okuler hipertansiyon tanısı almış 240 hastanın 480 gözü dahil edildi. Ultrasonik pakimetre ile tüm gözlere SKK ölçümü yapıldıktan sonra DKT, GAT, NKT ve Tonopen cihazlarıyla randomize sıralamayla GİB ölçümleri yapıldı. Bu tonometrelerin ölçümleri ile SKK arasında korelasyon olup olmadığı istatistiksel olarak analiz edildi. Bulgular: SKK ince (520 μm altındaki) gözlerde SKK ile DKT ölçümü arasında korelasyon olmadığı, diğer tonometrelerin SKK’dan etkilendiği görüldü. Normal kalınlıktaki kornealarda (520-580 μm) SKK ile GİB ölçümleri arasında en düşük korelasyonu sırayla DKT ve Tonopen gösterdi. Kalın kornealarda (580 μm üzerinde) ise Tonopen SKK ile en az korelasyonu gösteren tonometre olarak dikkati çekti; bu grupta GAT, DKT ve NKT SKK ile korelasyon gösteriyordu. Sonuç: Özellikle glokom kliniklerinde ve refraktif cerrahi geçirmiş bireylerde GİB ölçümünde SKK değerlerinin tonometrik ölçümlere etkili olabileceği akılda tutulmalıdır. Bulgularımız DKT’nin SKK’dan oldukça bağımsız ölçüm yapma potansiyeli ile gelecekte GAT’nin yanında yer alacağını düşündürmektedir.

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Cite This Article

ESER, E., BAŞER, E. F., SEYMENOĞLU, G. (2008). The relationship between central corneal thickness and intraocular pressure measurements obtained with a dynamic contour tonometer, noncontact tonometer,tono-pen, and goldmann applanation tonometer. Glokom Katarakt, Cilt: 3 - Sayı: 2, 107–112. https://ajindex.com/articles/226602

References (18)

  1. Goldmann H, Schmidt T.: Über applanationstonometrie. Ophthalmologica. 1957;134:221-242
  2. Whitacre MM, Stein RA, Hassanein K.: The effect of corneal thickness on applanation tonometry. Am J Ophthalmol. 1993;115:592-596
  3. Argus WA.: Ocular hypertension and central corneal thickness. Ophthalmology. 1995;102:1810-1812
  4. Morad Y, Sharon E, Hefetz L, et al.: Corneal thickness and curvature in normal tension glaucoma. Am J Ophthalmol. 1998;125:164-168
  5. Bashford KP, Shafranov G, Tauber S, et al.: Considerations of glaucoma in patients undergoing corneal refractive surgery. Surv Ophthalmol. 2005;50:245-251
  6. Kaufmann C, Bachmann LM, Thiel MA.: Intraocular pressure measurements using Dynamic contour tonometry after Laser In Situ Keratomileusis. Invest Ophthalmol Vis Sci. 2003;44:3790-3794
  7. Rashad KM, Bahnassy AA.: Changes in intraocular pressure after laser in situ keratomileusis. J Refract Surg. 2001;17:420-427
  8. Garzozi HJ, Chung HS, Lang Y, et al.: Intraocular pressure and photorefractive keratectomy: a comparison of three different tonometers. Cornea. 2001;20:33-36
  9. Climenhaga H, Plucinska H.: Comparison of the Pulsair noncontact tonometer and the Goldmann applanation tonometer. Can J Ophthalmol. 1989;24:7-9
  10. Moseley MJ, Evans NM, Fielder AR.: Comparison of a new noncontact tonometer with Goldmann applanation. Eye. 1989;3:332-337 11. Sponsel WE, Kaufman PL, Strinden TI, et al.: Evaluation of the Keeler Pulsair non-contact tonometer. Acta Ophthalmol. 1989;67:567-572
  11. Iester M, Mermoud A, Achache F, et al.: New Tonopen XL: comparison with the Goldmann tonometer. Eye. 2001;15:52-58
  12. Bandyopadhyay M, Raychaudhuri A, Lahiri SK, Schwartz EC, Myatt M, Johnson GJ. Comparison of Goldmann applanation tonometry with the Tonopen for measuring intraocular pressure in a population-based glaucoma survey in rural West Bengal. Ophthalmic Epidemiol 2002; 9: 215-24
  13. Kanngiesser HE, Kniestedt C, Robert YC.: Dynamic contour tonometry: presentation of a new tonometer. J Glaucoma. 2005;14:344-350
  14. Dayanir V, Sakarya R.: Effect of corneal drying on central corneal thickness. J Glaucoma. 2004;13:6-8
  15. Mishima S.: Corneal thickness. Surv Ophthalmol. 1968;13:57-96
  16. De Cevallos E, Dohlman CH, Reinhart WJ.: Corneal thickness in glaucoma. Ann Ophthalmol. 1976;8:177-182
  17. Graf M.: Significance of the corneal thickness in non-contact tonometry. Klin Monatsbl Augenheilkd. 1991;199:183-186
  18. Stodtmeister R.: Applanation tonometry and correct