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مقاله
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Abstract
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Title:
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A Comparative Study of the Pachymetry Results of Orbscan and Pentacam Compared with UltraSound in 90 Refractive Surgery Candidates with CCT less than 540 Microns and their Diagnosis Signs of Glaucoma
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Author(s):
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Razmjou Hasan, Ghandehari-Motlagh Mohammad, Akbari Mojtaba
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Presentation Type:
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Poster
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Subject:
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Cornea and Anterior Segment
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Others:
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Presenting Author:
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Name:
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Mohammad Ghandehari-Motlagh
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Affiliation :(optional)
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Isfahan University of Medical Sciences and Sadra Eye Surgery Center, Isfahan-Iran
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E mail:
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oculist233@aol.com
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Phone:
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03116689608
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Mobile:
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09132000891
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Purpose:
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To Compare the pachymetry results(CCT) of Orbscan and Pentacam with UltraSound(US) as the gold standard,in CCTs less than 540 microns as high risks of high PCI and evaluation of Pre and Post-Op PCIs. PCI = IOP/CCT 3(pressure to cornea Index).
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Methods:
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In this cohort study,90 refractive surgery candidates with CCT less than 540 microns measured with Orbscan were enrolled. Pentacam imaging, US pachymetry and non-contact tonometry with PT100(Reichter) were then done.C/D ratios > 0.5 were refered to perimetry for visual field defect screening. 1 month after refractive surgery ,the patient’s IOP and US pachymetry were repeated and the new PCI was calculated.CCTs of the 2 pachymetry methods were compared with ultrasound.
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Results:
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Mean age = 28.02 +_6.15 yrs/old, M 20(22.2% ) and F 70(77.7% ).Due to thin corneas, 38( 42.22% ) TS and 52( 57.77% ) were standard refractive surgery procedure.Correlation between the pachymetry results of orbscan-US and Pentacam-US:r=0.751 and r=0.889 respectively and so Pentacam results is more accurate. Pre-op and post-op PCIs are meaningfully correlated (r=0.930). Visual field defect not detected in our patients.
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Conclusion:
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The pentacam results of pachymetry are more accurate than orbscan. Due to CCT involved in PCI formula,it is a more comprehensive value than IOP for routine eye examinations.
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Attachment:
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