Oltulu Refik, Demirel Sibel, Sarac Ozge, Ozer Mediha Dilek
Kahramanmaras State Hospital, Department of Ophthalmology, Kahramanmaras, Turkey.
Semin Ophthalmol. 2013 Jul;28(4):206-9. doi: 10.3109/08820538.2012.760617. Epub 2013 Apr 25.
The aim of this study was to evaluate the effects of pterygium surgery on the corneal topography and anterior chamber parameters using a Pentacam system.
Prospective clinical study. Scheimpflug camera was performed in 21 eyes of 21 patients with primary pterygium, both before and 2 months after pterygium excision using conjunctival autograft technique. The topographic parameters such as total mean refractive power, index of surface variance, aberration coefficent, anterior chamber depth, anterior chamber angle were evaluated. The best corrected visual acuity (BCVA) changes were also noted. Differences between preoperative and postoperative values were compared.
The mean refractive power was 42.59 ± 3.44 dioptry (D) preoperatively and 43.72 ± 2.07 D postoperatively (p = 0.154). The mean preoperative index of surface variance was 72.24 ± 48.72. It was decreased to 32 ± 23.13 after surgery (p = 0.003). The mean aberration coefficent was 3.04 ± 1.27 preoperatively. It was decreased to 2.4 ± 1.06 postoperatively (p = 0.017). The preoperative and postoperative values of the mean anterior chamber depth were 2.91 ± 0.49 mm and 2.91 ± 0.52 mm, respectively (p = 0.638). The mean preoperative anterior chamber angle was 33.13 ± 6.89°. It was measured as 32.77 ± 4.86° postoperatively (p = 0.779). The mean overall preoperative BCVA was logMar 0.13 ± 0.29. It was significantly improved to logMar 0.0238 ± 0.07 after pterygium surgery (p = 0.011).
Corneal topographic changes induced by pterygium are almost reversible after surgical treatment of the pterygium. Pterygium surgery significantly improves the BCVA, and decreases the aberration coefficient and index of surface variance; however, it does not have any effect on the anterior chamber parameters.
本研究旨在使用Pentacam系统评估翼状胬肉手术对角膜地形图和前房参数的影响。
前瞻性临床研究。对21例原发性翼状胬肉患者的21只眼睛，在使用结膜自体移植技术切除翼状胬肉之前和术后2个月进行了Scheimpflug相机检查。评估了诸如总平均屈光力、表面变化指数、像差系数、前房深度、前房角等地形学参数。还记录了最佳矫正视力（BCVA）的变化。比较术前和术后值之间的差异。
术前平均屈光力为42.59±3.44屈光度（D），术后为43.72±2.07 D（p = 0.154）。术前平均表面变化指数为72.24±48.72。术后降至32±23.13（p = 0.003）。术前平均像差系数为3.04±1.27。术后降至2.4±1.06（p = 0.017）。术前和术后平均前房深度值分别为2.91±0.49 mm和2.91±0.52 mm（p = 0.638）。术前平均前房角为33.13±6.89°。术后测量为32.77±4.86°（p = 0.779）。术前总体平均BCVA为logMar 0.13±0.29。翼状胬肉手术后显著提高至logMar 0.0238±0.07（p = 0.011）。
翼状胬肉手术治疗后，翼状胬肉引起的角膜地形学变化几乎是可逆的。翼状胬肉手术显著提高了BCVA，并降低了像差系数和表面变化指数；然而，它对前房参数没有任何影响。
