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目的 :探索有晶体眼后房型人工晶体 (Phakicposteriorchamberintraocularlens)植入术矫正高度近视的有效性和安全性。方法 :高度近视眼患者 10例 18眼 ,球面等量屈光度 - 12～ - 2 3.6 2D ,矫正视力≥ 0 .8者16眼 ,0 .2者 2眼。术前检查散瞳前后屈光度 ,角膜曲率 ,轴长和前房深度 ,角膜厚度 ,角膜水平子午线直径(WhitetoWhite ,WTW )。屈光度取较低的值进行计算 ,计算公式为Staar公司专用公式 ;根据角膜水平直径加0 .5mm选择人工晶体的长径 ;人工晶体为美国Staar公司产品 ,以胶原异分子聚合物为材料 ,双凹单片式。术前行YAG激光虹膜周边切除术 ,每眼两点 ,相隔 90° ,手术选择表面麻醉。经颞侧透明角膜隧道切口 ,植入折叠式人工晶体 ,置于透明晶体与虹膜之间 ,吸除粘弹物质 ,缩瞳 ,充盈前房。术后检查屈光度、角膜、前房、眼压、人工晶体等情况。结果 :1例术中人工晶体取出。 17眼成功者术后视力提高 ,屈光度明显降低且稳定 ,随访无回退 ,前房深度无改变 ,术后无持续眼压升高 ,人工晶体相容性好 ,1例 1眼前囊下晶体局限性混浊。结论 :有晶体眼后房型人工晶体植入预测性好 ,视力恢复迅速 ,无回退 ,无严重并发症 ,适用屈光度范围广 ,可有条件地选用
Objective: To investigate the efficacy and safety of phakic posterior chamber intraocular lens implantation in the correction of high myopia. Methods: Eighteen eyes of 10 patients with high myopia, spherical equivalent diopter - 12 ~ -236 2D, corrected visual acuity of ≥ 0.8, 16 eyes, and 0.2 eyes of 2 eyes. Preoperative and postoperative mydriatic diopter, corneal curvature, axial length and anterior chamber depth, corneal thickness, corneal horizontal meridian diameter (WhitetoWhite, WTW). Diopter take a lower value to calculate the formula for the Staar company-specific formula; according to the corneal diameter plus 0 .5mm choose the length of the artificial crystal; artificial crystal for the United States Staar company products, collagen polymer as a material, double Concave single-chip. Preoperative line YAG laser iris resection, two points each eye, separated by 90 °, surgical surface anesthesia. Transparent temporal corneal tunnel incision, implanted foldable intraocular lens, placed between the transparent crystal and the iris, absorbing viscoelastic substances, miosis, filling the anterior chamber. Postoperative examination of diopter, cornea, anterior chamber, intraocular pressure, intraocular lens and so on. Results: 1 case intraocular lens removed. Seventeen eyes were successfully treated with improved visual acuity, significantly lower and stable refraction, no regression with follow-up, no change in anterior chamber depth, no postoperative persistent intraocular pressure elevation, good intraocular lens compatibility, and 1 case of anterior subcapsular lens limitation Turbidity. CONCLUSION: Posterior chamber intraocular lens implantation with crystalline lens has good predictive ability, rapid visual acuity recovery, no regression and no serious complications. It is suitable for a wide range of refractive power and can be selected conditionally