Colin J, Sale Y, Malet F, Cochener B
Department of Ophthalmology, University of Brest, France.
J Refract Surg. 1996 Sep-Oct;12(6):697-9. doi: 10.3928/1081-597X-19960901-11.
Videokeratography has enabled detection of inferior steepening patterns in patients thereby designated as keratoconus suspects. Since no information about the corneal thickness of these eyes is available, we studied several patients with such patterns, and compared the corneal thickness of their eyes with that of normals.
Three groups of patients who had undergone videokeratography were studied with ultrasonic pachymetry centrally and in four quadrants at the 3-mm clear zone: 44 eyes with true keratoconus, 23 eyes of individuals with inferior steepening of the cornea who were family members of patients with keratoconus; and 44 normal eyes never fitted with contact lenses. The corneal thickness of the eyes in the first two groups was then compared with that in the third using ANOVA and Student's t test.
Corneal thickness in the normal eyes and in those with inferior steepening was similar in all except the inferotemporal quadrant. In this quadrant, the corneas of the eyes with inferior steepening were thinner than those of the normal eyes: 544 +/- 32 microns vs 581 +/- 30 microns (p < .05)
Eyes with inferior steepening on videokeratography have thinner inferotemporal corneas than normal eyes.
视频角膜地形图已能够检测出被认定为圆锥角膜疑似患者的角膜下部陡峭模式。由于这些眼睛的角膜厚度信息不可得，我们研究了几名有此类模式的患者，并将他们眼睛的角膜厚度与正常人的进行比较。
对三组接受过视频角膜地形图检查的患者进行研究，在3毫米透明区的中央及四个象限用超声测厚仪测量：44只确诊圆锥角膜的眼睛，23只角膜下部陡峭的个体的眼睛，这些个体是圆锥角膜患者的家庭成员；以及44只从未佩戴过隐形眼镜的正常眼睛。然后使用方差分析和学生t检验将前两组眼睛的角膜厚度与第三组进行比较。
除颞下象限外，正常眼睛和角膜下部陡峭眼睛的角膜厚度在其他所有象限相似。在该象限，角膜下部陡峭眼睛的角膜比正常眼睛的角膜薄：分别为544±32微米和581±30微米（p<.05）
视频角膜地形图显示角膜下部陡峭的眼睛，其颞下角膜比正常眼睛薄。
