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C Erb, C Bader, F Ueckerseifer, A Schroeder, M Meyer; Evaluation of Corneal Thickness Using the Orbscan II Slit Scanning System . Invest. Ophthalmol. Vis. Sci. 2002;43(13):167.
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Purpose:The Orbscan II slit scanning system was used to evaluate the corneal thickness in normal eyes. Methods:403 patients were included and divided into 7 age groups: 10-19 years (n=36; m:f=12:21), 20-29 years (n=91; m:f=53:38), 30-39 years (n=72; m:f=49:23), 40-49 years (n=65; m:f=44:21), 50-59 years (n=63; m:f=38:25), 60-69 years (n=54; m:f=33:21) and 70-79 years (n=22; m:f=17:5). Orbscan II slit scanning system was used to measure the corneal thickness at five locations (central, superior, temporal, inferior, nasal) of the right and left eye two times a day. For calculating the normal values mean value and standard deviation of all parameters were provided. Statistical analysis was performed by t-test. Results: There was a significant age related difference at central, superior, inferior and nasal location of the right eyes and at the central, inferior and nasal location of the left eyes (p<0.05). Furthermore, the difference at the nasal location of the right and left eyes between males and females was statistically significant (r≷0.9; p=0.000). Conclusion:The Orbscan II slit scanning system provides age and sex related reference datas of corneal thickness from normal eyes. These informations can be helpful for comparison with e.g. diseased corneas or interpretation of differences in measurement of intraocular pressure (Goldmann-applanation-tonometry).
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