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مقاله
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Abstract
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Title:
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Anterior and Posterior Corneal Curvature: Normal Values in Healthy Iranian Population Obtained with the Orbscan II
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Author(s):
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Hamid Gharaee MD ; Mojtaba Abrishami MD ; Omid Fakhrizadeh MD
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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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Mojtaba Abrishami
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Affiliation :(optional)
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Al-Zahra Eye Center, Zahedan University of Medical Sciences, Zahedan, Iran
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E mail:
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mojtaba_abrishami@yahoo.com
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Phone:
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05118433192
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Mobile:
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09155207987
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Purpose:
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The objective of study was to determine the normative values of anterior and posterior best fit sphere (A-BFS and P-BFS) measured with Orbscan II Topography System.
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Methods:
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A total of 1001 healthy participants aged 18-45 years participated in this observational cross-sectional study. The study population consisted of 616 female and 385 male subjects. The A-BFS and P-BFS were measured with the Orbscan II. The differences between genders, between right and left eyes and age-related changes were evaluated. Statistical analyses were performed using student t test.
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Results:
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The average A-BFS in our study population was recorded as 43.062±1.609D (median: 43.00D, mode: 43.80D, minimum: 34.80D and maximum: 35.80D). The A-BFS was 43.231±1.473D in males and 42.793±1.774D in females which was statistically different between genders (P<0.001). The average P-BFS in our study population was recorded as 52.698±2.395 D (median: 52.60 D, mode: 53.10 D, minimum: 34.80D and maximum: 64.50D). The P-BFS was 52.892±2.227D in males and 52.387±2.617D in females which was statistically different between genders (P<0.001). However, A-BFS and P-BFS were not statistically different between right and left eyes (p=0.523 and p=0.339 respectively). In addition, A-BFS and P-BFS were not correlated with the age (r=0.021, p= 0.342 and r=0.178 respectively). Considering 95% confidence interval, A-BFS less than 40.60D and greater than 45.40D and P-BFS less than 49.20D and greater than 56.40D would be considered abnormal.
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Conclusion:
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Detailed description and analysis of A-BFS and P-BFS with Orbscan demonstrated that the obtained average value BFS were higher in male than female and not changed with increasing age.
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Attachment:
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