目的：利用Oculus Keratograph眼前节分析仪研究不同年龄段共同性外斜视患者眼表泪液情况。

方法：收集我院眼科门诊诊断为共同性外斜视的患者66例，将患者依据年龄段分为2～7岁组、8～18岁组、19～46岁组三组。应用Oculus眼前节分析仪研究其眼表情况：包括泪河高度、刺激性泪河高度、眼红指数、非侵袭性BUT等。

结果：2～7岁组分别与8～18岁组、19～46岁组在BUT、颞侧结膜眼红指数、颞侧睫状眼红指数、鼻侧睫状眼红指数比较差异有统计学意义(P<0.05)。同一年龄段不同部位眼红指数差异及同一年龄段主导眼、非主导眼间眼红指数差异无统计学意义(P>0.05)。共同性外斜视患者眼红指数随年龄增长呈现正向直线相关关系。

结论：共同性外斜视患者在术前存在干眼和泪膜不稳定，学龄前儿童围手术期需要特别引起注意，需尽快完善国内各年龄段儿童眼表数据。

METHODS: The ocular surface condition of 66 patients with extropia were examined by Oculus anterior segment analyzer, including tear meniscus height, tear meniscus height after irritation, redness index, non-invasive break-up time(BUT), average BUT. Three groups were divided according to age: 2-7 years, 8-18 years and 19-46 years.

RESULTS: BUT, temporal conjunctival redness index, temporal ciliary redness index, nasal ciliary redness index of 2-7 years group were statistically different to those of 8-18 years group and 19-46 years group. There were no statistically differentiations between redness index at different areas in each group and no statistically differentiations in redness index between dominant eye and nondominant eye(P>0.05). Redness index showed a positive lineal correlation with age.

CONCLUSION: Patients are combined with dry eye and unstable tear firm beside strabismus before surgery. Ocular surface assessment should be paid attention to in preschool children in order to prevent complications around operation. Ocular surface data of children with different ages needs to be screened and collected in China.