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مقاله
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Abstract
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Title:
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Impact of keratoconus grades on repeatability of keratometry readings: comparison of 5 devices
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Author(s):
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Hassan Hashemi , Abbasali Yekta ,Sara Soroush, Reyhane Shariati, Nooshin Dadbin, Mehdi Khabazkhoob
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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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Mehdi Khabaz khob
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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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khabazkhoob@yahoo.com
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Phone:
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Mobile:
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09120250544
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Purpose:
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To determine the repeatability of keratometry measurements of Pentacam, EyeSys, Orbscan, IOL Master, and Javal manual keratometer at different grades of keratoconus
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Methods:
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78 eyes of 45 keratoconus patients were assessed. Keratometry was performed first with the Pentacam, followed by EyeSys, Orbscan, IOLMaster, and Javal, in the same order. Three measurements were made with each device.
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Results:
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In group 1, the repeatability index was highest with Pentacam and lowest with Orbscan (0.36-1.24). In group 2, the ICCs for min-K ranged from 0.795 with EyeSys to 0.986 with Pentacam, and the ICCs for max-K ranged from 0.823 with Orbscan to 0.974 with Pentacam. The repeatability index for min-K (0.53-2.11) and max-K (0.6-1.92) in this group was highest for Pentacam and lowest for Orbscan. In group 3, the ICCs for min-K and max-K ranged from 0.890 to 0.990, and the repeatability index for min-K varied between 1.66 with Pentacam and 2.98 with EyeSys; for max-K, the index was from 2.15 with IOL Master to 2.81 with Javal
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Conclusion:
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In mild keratoconus patients, the 5 studied devices have acceptable repeatability in keratometry reading. In cases with a maximum keratometry reading more than 55D, all devices have reduced repeatability due to measurement errors; thus, measurements may not be so reliable
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Attachment:
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