摘要
目的研究翼状胬肉面积（侵入角膜长度、角膜缘宽度、总面积）和角膜散光的关系。并探讨其引起角膜性散光的临界面积和翼状胬肉手术的时机及必要性。方法观察112单眼鼻侧翼状胬肉患者,分别测量出其侵入角膜长度、角膜缘宽度和总面积（总面积计算方法：翼状胬肉头部至半月皱襞的距离×角膜缘宽度/2）。角膜曲率计和OrbscanⅡ（3 mm区域）用以测量角膜散光。结果翼状胬肉侵入角膜长度0.38～5.69 mm,平均（2.15±1.12）mm,宽度1.35～8.26 mm,平均（3.27±1.20）mm;总面积（1.8～20.5）mm^2,平均（6.6±4.1）mm^2。翼状胬肉眼引起的角膜散光的平均值[（3.2±1.9）D]明显较对侧眼[（0.26±0.5）D]有显著意义（P〈0.001）翼状胬肉引起角膜散光中顺规散光占59.2%,逆规散光占30.6%,斜轴散光占10.2%。翼状胬肉总面积与侵入角膜长度和角膜缘宽度呈正相关。不同翼状胬肉眼间侵入角膜长度越大,角膜缘宽度越宽,引起角膜散光越大（P〈0.001）。翼状胬肉头部侵入角膜达（2.0±0.3）mm、宽度达（5.0±0.2）mm、总面积（6.25±1.9）mm^2可以引起（2.5±0.9）D的角膜散光。结论翼状胬肉总面积（侵入角膜长度、角膜缘宽度、总面积）与角膜散光存在显著相关性。翼状胬肉头部侵入角膜达（2.0±0.3）mm、宽度达（5.0±0.2）mm、总面积（6.25±1.9）mm^2可以考虑手术切除以使散光得以改善,从而提高患眼视力。
Objective To study the relationship between pterygium size（extension,width,total area） and corneal astigmatism in eyes with unilateral primary pterygium.Also to determine the critical size for before the occurrence of a significant corneal astigmatism.Methods This study was conducted on 112 eyes of 112 patients with unilateral primary pterygium.The extension and width were measured and the total area was calculated.Automated keratometry and OrbscanⅡ（3 mm zone） was used to determine corneal astigmatism.Results The extension of pterygium ranged from 0.38 to 5.69 mm（mean,2.15±1.12 mm）,the width ranged from 1.35 to 8.26 mm（mean,3.27±1.20 mm）and the total area ranged from 1.8 to 20.5 mm^2（mean,6.6±4.1 mm^2）.The mean value of corneal astigmatism was significantly higher in pterygium-affected eyes（3.2±1.9 D） than control eyes（0.26±0.5 D）.With-the-rule was the main type of pterygium-induced astigmatism（59.2%）,followed by against-the-rule（30.6%） and oblique（10.2%）.Pterygium extension had the best correlation followed by total area and width.A stronger correlation was noted between pterygium size and the difference in corneal astigmatism between pterygium-affected eyes and control eyes.Pterygium Induced 2.5±0.9 D of corneal astigmatism when its extension exceeded 2.0±0.3 mm,width exceeded 5.0±0.2 mm,or total vational study performed on patients with unilateral primary area exceeded（6.25±1.9） mm^2.Conclusion Pterygium extension and total area have a stronger correlation with corneal astigmatism than with width.Surgical intervention is indicated when pterygium extension exceeded 2.0±0.3 mm,width exceeded 5.0±0.2 mm,or total area exceeded（6.25±1.9） mm^2.
出处
《临床眼科杂志》
2011年第2期143-145,共3页
Journal of Clinical Ophthalmology
关键词
角膜散光
翼状胬肉
Astigmatism
Pterygium
Cornea
