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目的 :研究翼状胬肉的长度、宽度及胬肉覆盖角膜的面积对角膜表面形态的影响以及术后的改善情况。方法 :对翼状胬肉 33例 ,4 5只眼患者术前进行检影验光及角膜地形图检查 ,术中测量翼状胬肉的宽度及长度 ,对翼状胬肉的宽度、长度及面积与角膜表面规则指数 (SRI)、不对称指数 (SAI)及角膜散光进行相关性研究 ;随访 2 3例 ,2 8只眼翼状胬肉患者进行术后的角膜地形图检查 ,观察各项指标的变化 ,从而找出最好的手术时机。结果 :术前翼状胬肉的长度与角膜散光 (r =0 30 4 ,P=0 0 4 2 ) ,SRI(r =0 4 78,P =0 0 0 1)和SAI(r =0 5 0 7,P <0 0 0 1)具有明显的相关性 ;翼状胬肉的宽度及面积与SRI(r =0 4 90 ,P =0 0 0 1;r =0 5 99,P <0 0 0 1)和SAI(r =0 5 0 8,P <0 0 0 1;r =0 5 83,P <0 0 0 1)有明显的相关性 ;而散光却与SRI及SAI(r=0 2 5 3,P =0 0 93;r=0 2 6 8,P =0 0 75 )无明显的相关性。术后只有角膜散光的改善具有显著性差异 (P =0 0 2 3) ,而SRI及SAI的改善无显著性差异 (P =0 4 2 3;P =0 14 3)。结论 :翼状胬肉的出现、生长及其手术切除对角膜的球面性、规则性以及散光均有影响 ,而有些影响是不能通过手术解除 ,所以本研究建议可适当地提前手术时机
Objective: To study the influence of the length and width of pterygium on corneal surface morphology and the postoperative improvement. Methods: 33 cases of pterygium and 45 cases of preoperative retinoscopy and corneal topography examination, intraoperative measurement of the width and length of the pterygium, the pterygium width, length and area and the corneal surface (SRI), asymmetry index (SAI) and corneal astigmatism. The follow-up was performed in 23 patients with 28 eyes of pterygium for the examination of corneal topography, and the changes of various indexes were observed Find the best timing for surgery. RESULTS: The length of preoperative pterygium was associated with corneal astigmatism (r = 0 30 4, P = 0 0 4 2), SRI (r = 0 4 78, P = 0 0 0 1) and SAI 7, P <0 0 0 1). The width and area of pterygium were significantly correlated with SRI (r = 0 4 90, P = 0 0 0 1; r = 0 5 99, P 0 01 0 ) Had significant correlation with SAI (r = 0 588, P <0 0 01; r 0 053, P 0 01 0); while astigmatism was associated with SRI and SAI (r 025 3, P = 0 0 93; r = 0 2 6 8, P = 0 0 75) no significant correlation. There was a significant difference in the improvement of postoperative corneal astigmatism (P = 0 0 2 3), but no significant difference in improvement of SRI and SAI (P = 0 4 2 3; P = 0 14 3). CONCLUSIONS: The presence, growth and surgical resection of pterygium have effects on corneal sphericalness, regularity, and astigmatism, and some of the effects can not be surgically removed. Therefore, this study suggests that timing of surgery may be appropriately advanced