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Journals / MN Oftalmoloji / 2012 / Cilt: 19 - Sayı: 3

Corneal thickness measurements by ultrasonic pachymetry and scheimpflug system

Ultrasonik pakimetri ve scheimpflug sistemi ile kornea kalınlığı ölçümü

C. Banu COŞAR
Tansu GÖNEN
A. Bozkurt ŞENER
Pages
132–136
DOI
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AI Summary & Key Takeaways

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

The corneal thickness asymmetry between fellow eyes should alert the physician for the suspicion of corneal disease.

📌 3 Key Takeaways

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Objective & Hypothesis:Aim: To compare corneal thickness mesurements by Scheimpflug imaging (Pentacam, Oculus, Germany) and ultrasonic pachymetry (Tomey pachymeter, SP-3000, USA).
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Key Findings & Data:Material and Method: The records of 200 patients with healthy corneas who had applied for refractive surgery were evaluated retrospectively.
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Conclusion & Impact:The corneal thickness asymmetry between fellow eyes should alert the physician for the suspicion of corneal disease.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Aim: To compare corneal thickness mesurements by Scheimpflug imaging (Pentacam, Oculus, Germany) and ultrasonic pachymetry (Tomey pachymeter, SP-3000, USA). Material and Method: The records of 200 patients with healthy corneas who had applied for refractive surgery were evaluated retrospectively. Pentacam and ultrasonic pachymetry values of these 400 eyes were analyzed. Results: The mean central corneal thickness was 545.00±1.49 (470-623) &#956; by Pentacam and 546.74±1.58 (467-640) &#956; by ultrasonic pachymeter (p=0.002). There was a positive correlation between these two measurement methods (r=0.939, p<0.001). By Pentacam, 3 mm paracentral corneal thickness was 656.53±1.91 (565-765) &#956; superiorly, 627.87±1.86 (543-867) &#956; nasally, 616.62±1.65 (529-716) &#956; inferiorly and 607.92±1.71 (513-708) &#956; temporally (p<0.001). The mean corneal thickness was highest at the superior and thinnest at the temporal side (p<0.001). In 378 eyes (94.5%) superior cornea was the thickest and in 272 eyes (68%) the temporal cornea was the thinnest (p<0.001). The mean difference between corneal thickness measurements at the center and inferiorly was 71.63±0.77 &#956; (p<0.001, 95% confidence interval: from -73.14 to -70.11). Conclusion: Not only central but also paracentral corneal thickness should be evaluated routinely in clinical practice since the relativity of corneal thickness centrally to inferiorly is altered in ectatic diseases of the cornea. The corneal thickness asymmetry between fellow eyes should alert the physician for the suspicion of corneal disease.

Özet

Amaç: Scheimpflug görüntüleme (Pentacam, Oculus, Germany) ve ultrasonik pakimetri (Tomey pachymeter, SP-3000, USA) ile kornea kalınlığı ölçümlerini karşılaştırmak. Gereç ve Yöntem: Refraktif cerrahi için başvurmuş, korneası sağlıklı 200 hastanın 400 gözü retrospektif olarak incelendi. Bu 400 gözün Pentacam ile ultrasonik pakimetri değerleri analiz edildi. Bulgular: Ortalama merkezi kornea kalınlığı Pentacam ile 545,00±1,49 (470-623) μ ve ultrasonik pakimetri ile 546,74±1,58 (467-640) μ idi (p=0,002). Bu iki ölçüm yöntemi arasında pozitif korelasyon vardı (r=0,939, p<0,001). Üç mm parasantral kornea kalınlığı superiorda 656,53±1,91 (565-765) μ, nazalde 627,87±1,86 (543-867) μ, inferiorda 616,62±1,65 (529-716) μ ve temporalde 607,92±1,71 (513-708) μ (p<0,001) idi. Ortalama kornea kalınlığı superiorda en fazla ve temporalde en ince idi (p<0,001). Üç yüz yetmiş sekiz gözde (%94,5) superior kornea en kalın ve 272 gözde (%68) temporal kornea en ince idi (p<0,001). Merkezi ve inferior kornea kalınlıkları arasındaki fark 71,63±0,77 μ (p<0,001, %95 güvenilirlik aralığı: -73,14 ile -70,11 arası) idi. Sonuç: Korneanın ektatik hastalıklarında, merkezi kornea ile inferior kornea arasındaki rölativite değiştiğinden; rutin klinik pratikte sadece merkezi değil, parasantral kornea kalınlığı da değerlendirilmelidir. Sağ ve sol göz arasında kornea kalınlığı asimetrisi de kornea hastalığı şüphesi açısından klinisyeni uyarmalıdır.

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Cite This Article

COŞAR, C. B., GÖNEN, T., ŞENER, A. B. (2012). Corneal thickness measurements by ultrasonic pachymetry and scheimpflug system. MN Oftalmoloji, Cilt: 19 - Sayı: 3, 132–136. https://ajindex.com/articles/295766

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References (12)

  1. Ucakhan OO, Ozkan M, Kanpolat A. Corneal thickness measurements in normal and keratoconic eyes: Pentacam coprehensive eye scanner versus noncontact specular microscopy and utrasound pachymetry. J Cataract Refract Surg 2006; 32:970-7
  2. Prospero Ponce CM, Rocha KM, Smith SD, Krueger RR. Central and peripheral corneal thickness measured with optical coherence tomography, Scheimpflug imaging, and ultrasound pachymetry in normal, keratoconus-suspect, and postlaser in situ keratomleusis eyes. J Cataract Refract Surg 2009;35:1055-62
  3. Ishibazawa A, Igarashi S, Hanada K, Nagaoka T, Ishiko S, Ito H, et al. Central corneal thickness measurements with Fourier-domain optical coherence tomography versus ultrasonic pachymetry and rotating Scheimpflug camera. Cornea 2011;30:615-9
  4. Modis L Jr, Szalai E, Nemeth G, Berta A. Reliability of the corneal thickness measurements with the Pentacam HR imaging system and ultrasound pachymetry. Cornea 2010;30: 561-6
  5. Al-Mezaine HS, Al-Amro SA, Kangave D, Sadaawy A, Wehaib TA, Al-Obeidan S. Comparison between central corneal thickness measurements by Oculus Pentacam and ultrasonic pachymetry. Int Ophthalmol 2008; 28:333-8
  6. He YL, Li XX, Bao YZ, Liu GD, Hu YW. Measurement of central corneal thickness in myopic eyes with ultrasound and Pentacam Scheimpflug system. Zhonghua Yan Ke Za Zhi 2006;42:985-8
  7. Fujioka M, Nakamura M, Tatsumi Y, Kusuhara A, Maeda H, Negi A. Comparison of Pentacam Scheimpflug camera with ultrasound pachymetry and noncontact specular microscopy in measuring centtral corneal thickness. Curr Eye Res 2007;32: 89-94
  8. Hosseini J, Katbab A, Khalili MR, Abtahi MB. Comparison of corneal thickness measurements using Galilei, HR Penta - cam, and ultrasound. Cornea 2010;29:1091-5
  9. Bourges JL, Alfonsi N, Laliberte JF, Chagnon M, Renard G, Legeais JM, Average 3-dimensional models for the comparison of Orbscan II and Pentacam pachymetry maps in normal corneas. Ophthalmology 2009;116:2064-71
  10. Hashemi H, Mehravaran S. Central corneal thickness measurement with Pentacam, Orbscan II, and ultrasound devices before and after laser refractive surgery for myopia. J Cataract Refract Surg 2007; 33:1701-7
  11. Lackner B, Schmidinger G, Pieh S, Funovics MA, Skorpik C. Repeatibiity and reproducibility of central corneal thickness measurement with Pentacam, Orbscan, and ultrasound. Optom Vis Sci 2005;82:892-9
  12. O’Donnell, Maldonado-Codina C. Agreement and repeatibility of central thickness measurement in normal