使用超声和Orbscan II进行角膜测厚的比较。
Comparison of corneal pachymetry using ultrasound and Orbscan II.
作者信息
Fakhry Mohamed A, Artola Alberto, Belda José I, Ayala Ma José, Alió Jorge L
机构信息
Department of Refractive Surgery, Instituto Oftalmológico de Alicante, Alicante, Spain.
出版信息
J Cataract Refract Surg. 2002 Feb;28(2):248-52. doi: 10.1016/s0886-3350(01)01277-9.
PURPOSE
To compare Orbscan II pachymetry with ultrasonic pachymetry in eyes having corneal refractive surgery.
SETTING
Instituto Oftalmológico de Alicante, Alicante, Spain.
METHODS
In this comparative prospective study, 72 eyes (36 patients) were divided into 4 groups: Group 1, 16 eyes with haze after photorefractive keratectomy (PRK); Group 2, 12 eyes with no haze after PRK; Group 3, 24 eyes that had uneventful laser in situ keratomileusis; Group 4, 20 normal eyes. The corneal thickness was measured in all eyes by the Orbscan II (version 3.27.10, Orbtek Inc.) and then by ultrasonic pachymetry (DHC 500, Technology Inc.).
RESULTS
The results between the 2 systems of pachymetry were significant in Group 1 (P < .0001) and not significant in Groups 2, 3, and 4 (P = .056, P = .051, and P = .68, respectively). A statistically significant correlation existed between the grade of haze and the decrease in Orbscan readings (C = -0.821, P < .0001).
CONCLUSION
The Orbscan II pachymetry measurements correlated with the ultrasound measurements in eyes with clear corneas. Haze after PRK decreased the Orbscan pachymetry.
目的
比较角膜屈光手术后眼的Orbscan II测厚法与超声测厚法。
设置
西班牙阿利坎特市阿利坎特眼科研究所。
方法
在这项比较性前瞻性研究中，72只眼（36例患者）被分为4组：第1组，16只眼在准分子激光原位角膜磨镶术（PRK）后出现角膜 haze；第2组，12只眼在PRK后无角膜 haze；第3组，24只眼行激光原位角膜磨镶术过程顺利；第4组，20只正常眼。所有眼均先用Orbscan II（版本3.27.10，Orbtek公司）测量角膜厚度，然后用超声测厚仪（DHC 500，Technology公司）测量。
结果
两组测厚系统的结果在第1组中有显著差异（P <.0001），在第2、3和4组中无显著差异（分别为P =.056、P =.051和P =.68）。角膜 haze等级与Orbscan读数降低之间存在统计学显著相关性（C = -0.821，P <.0001）。
结论
在角膜透明的眼中，Orbscan II测厚测量结果与超声测量结果相关。PRK后的角膜 haze降低了Orbscan测厚值。
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