The effect of artificial tears on computer-assisted corneal topography in normal eyes and after penetrating keratoplasty.
The effect of artificial tears on computer-assisted corneal topography in normal eyes and after penetrating keratoplasty.
复制标题
人工泪液对正常眼和穿透性角膜移植术后计算机辅助角膜地形图的影响。
DOI：
10.1016/s0002-9394(14)72775-8
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发表时间：
1995
影响因子：
4.2
通讯作者：
Feldman,ST
中科院分区：
文献类型：
--
作者：
Pavlopoulos,GP;Horn,J;Feldman,ST
PurposeTo examine the effect of adding artificial tears for one minute to normal eyes and eyes that have undergone keratoplasty by using computer-assisted videokeratography.MethodsWe prospectively analyzed 24 normal corneas (24 patients) chosen by random number table (reproducibility section [10 eyes], tear section [14 eyes]) as well as 14 postkeratoplasty corneas. The parametric descriptors analyzed statistically included the simulated keratometry value, surface asymmetry index, surface regularity index, power at the vertex normal, and the pupil offsets from the visual axis. Vectoral analysis was used to calculate the difference in power and axis between the simulated keratometry values before and after tear instillation.ResultsIn normal eyes, tear instillation increased the surface asymmetry index (0.28 ± 0.34, P = .01), changed the simulated keratometry value (0.23 diopter by 27.8 degrees), and power (0.79 ± 0.82 diopters, P = .004) and location (0.91 ± 0.76 mm) of the steepest point of the cornea changed. In postkeratoplasty eyes, the surface regularity index decreased (0.49 ± 0.80, P = .04), surface asymmetry index decreased (0.37 ± 1.03, P = .21), mean simulated keratometry value changed (1.04 diopters by 1.01 degrees), and power (0.70 ± 2.34 diopters, P = .28) and location (1.04 ± 1.17 mm) of the steepest point of the cornea changed. Changes were greater than the variability of the surface regularity index (0.07 ± 0.05), surface asymmetry index (0.04 ± 0.03), simulated keratometry value power (0.08 ± 0.06 diopter), and axis (4.6 ± 5 degrees).ConclusionsThe addition of artificial tears to normal or regular and symmetric eyes that have undergone keratoplasty worsened symmetry and changed the power and location of the steepest point. However, the addition of artificial tears to irregular eyes that have undergone penetrating keratoplasty created a more regular and symmetric surface and significantly altered the simulated keratometry values. We recommend that corneal topography be performed before the application of artificial tears.
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影响因子：
13.7
作者：
S. Wilson;S. Klyce;M. McDonald;J. C. Liu;H. Kaufman
通讯作者：
S. Wilson;S. Klyce;M. McDonald;J. C. Liu;H. Kaufman
DOI：
10.1001/archopht.1993.01090020113034
发表时间：
1993
期刊：
Archives of ophthalmology (Chicago, Ill. : 1960)
影响因子：
--
作者：
Maguire,LJ;Wilson,SE;Camp,JJ;Verity,S
通讯作者：
Verity,S
DOI：
10.3928/1081-597x-19891101-05
发表时间：
1989-11
期刊：
Refractive & corneal surgery
影响因子：
--
作者：
S. Klyce;S. Wilson
通讯作者：
S. Klyce;S. Wilson
角膜建模系统的当前应用。
DOI：
10.3928/1081-597x-19910101-24
发表时间：
1991
期刊：
Refractive & corneal surgery
影响因子：
--
作者：
P. McDonnell
通讯作者：
P. McDonnell
从角膜照片的计算机辅助分析得出的角膜形状的定量描述符。
DOI：
--
发表时间：
1989
期刊：
Refractive & corneal surgery
影响因子：
--
作者：
Dingeldein,SA;Klyce,SD;Wilson,SE
通讯作者：
Wilson,SE