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مقاله
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Abstract
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Title:
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Repeatability of Corneal thickness Measurements Obtained by Pentacamand Orbscan II in keratoconus
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Author(s):
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Hassan Hashemi, Mehdi Khabazkhoob
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Presentation Type:
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Oral
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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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Hassan Hashemi
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Affiliation :(optional)
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Noor ophthalmology research center, Noor Eye Hospital, Tehran, Iran
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E mail:
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info@irsocongress.org
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Phone:
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0
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Mobile:
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09121127421
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Purpose:
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To determine the repeatability of the Pentacam and Orbscan in measuring the corneal thickness in keratoconic patients.
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Methods:
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In this study, 63 eyes of 40 keratoconic patients were evaluated. For each patient, 3 measurements were performed with each device. The corneal thickness was first measured with the Pentacam and then the Orbscan. Interclass Correlation Coefficient (ICC) was reported for repeatability.
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Results:
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No significant difference was noted in the measurement of the corneal thickness and its thinnest point between the Orbscan and Pentacam. The repeatability of the measurement of the central corneal thickness (CCT) was 0.964 and 0.987 by the Pentacam and Orbscan, respectively. The ICC of measuring the corneal thinnest point was 0.995 and 0.983 by the Pentacam and Orbscan, respectively. In the measurement of the CCT, the highest and lowest repeatability was observed in individuals with corneal thickness more than 493µ and less than 462 µ, respectively. The repeatability of the Orbscan did not differ in different levels of corneal thickness.
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Conclusion:
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In keratoconic patients, the repeatability of the central corneal thickness and the thinnest point is acceptable. However, in patients with a thin cornea, the results of CCT by the Pentacam are not reliable.
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Attachment:
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