目的 探讨翼状胬肉手术对角膜地形图和对比敏感度的影响.方法 对136例翼状胬肉切除联合角膜缘-结膜自体移植术的原发性翼状胬肉患者术前和术后1个月角膜地形参数和对比敏感度进行比较.术前和术后之间的差异进行统计学分析.结果 翼状胬肉手术后平均Sim K散光和不规则性指数明显降低.平均屈光能力手术后显著增加.翼状胬肉所致的顺规散光在翼状胬肉切除后成为逆规散光(P =0.040).对比敏感度的6、12和18周/度(cpd)明显增加,分别从1.56 ±0.26、0.98±0.48和0.28±0.15增加到1.74±0.19、1.25±0.48和0.68±0.49(P值分别为=0.007,≤0.001,0.001).结论 翼状胬肉手术大大降低了角膜散光,提高对比敏感度.%Objective To investigate the effect of pterygium surgery on comeal topography and contrast sensitivity. Methods Computerized videokeratography (Orbscan IIz) was performed in 136 patients with primary pterygia, both before and 1 month after pterygium excision with limbal-conjunctival autografting. The topographic parameters were compared. Spatial contrast sensitivity testing was performed using VCTS 6500. Differences between preoperative and postoperative values were evaluated statistically. Results The mean Sim K astigmatism and irregularity index, significantly decreased after pterygium surgery. The mean refractive power significantly increased after the operation. The "with the rule" astigmatism induced by pterygium became "against - the-rule" astigmatism after pterygium removal ( P = 0.040). The contrast sensitivity of 6, 12, and 18 cycles per degree, significantly increased from 1.56 ±0.26、0.98 ±0.48and0.28 ±0.15, to 1.74 ±0.19, 1.25 ±0.48, and 0. 68 ±0.49, respectively ( P = 0.007, ≤0.001, ≤0.001, respectively). Conclusions Pterygium surgery significantly reduces corneal topographic astigmatism and improves contrast sensitivity.
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