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- W2357632989 abstract "Objective:To investigate factors affecting the accuracy of Orbscan pachymetry measurements(OP),with the anticipation of improving the precision of OP.Methods:In 126 eyes of 63 normal volunteers,CCT(central cornea thickness) was measured using both OP and UP(ultrasonic pachymetry measurements). The results from normal volunteers were used as the control group. The subjects were then divided into three groups:①Topical anesthesia(TA) group:after applying an anesthetic to the cornea,CCT was consecutively measured at 1 minute,5 minutes-10 minutes,15 minutes,20 minutes,25 minutes and 30 minutes by OP and UP.②Pre corneal tear film(PTF) group:divided into A and B sub groups. After experimentally removing(A sub group) and using a sterile glass stick to stimulate the conjunctiva of the volunteers,CCT was measured by ORB and ultrasound A,respectively,at 10 seconds,10 minutes,20 minutes and 30 minutes. All results were statistically analyzed.Results:The mean CCT in the control group measured by OP and UP was (539.27±40.71)μm and (547.33±38.60)μm,respectively(P0.05). Compared to the control group,the mean CCT of the TA group increased and displayed a throw liner over time(P0.05). The difference in the mean CCT measured by OP before and after removing PTF was smaller than the difference in the mean CCT measured by UP(P0.05). After the reactive tears were created,the mean CCT had obviously increased compared to that of the control group(P0.05).Conclusion:CCT increased reversibly after being anesthetized and displayed a throw liner over time. When CCT is measured by OP,the PTF needs to be included in the assessment. [" @default.
- W2357632989 created "2016-06-24" @default.
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- W2357632989 date "2004-01-01" @default.
- W2357632989 modified "2023-09-25" @default.
- W2357632989 title "The effects of topical anesthesia and tear film on pachymetry measurements" @default.
- W2357632989 hasPublicationYear "2004" @default.
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