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首页> 外文期刊>Transactions of the American Ophthalmological Society. >Studies of intrastromal corneal ring segments for the correction of low to moderate myopic refractive errors.
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Studies of intrastromal corneal ring segments for the correction of low to moderate myopic refractive errors.

机译：基质内角膜环节段的研究，用于矫正低至中度近视屈光不正。

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PURPOSE: Intrastromal corneal ring segments (ICRS) were investigated for safety and reliability in the correction of low to moderate myopic refractive errors. METHODS: Initially, 74 patients with spherical equivalent refractive errors between -1.00 and -4.25 diopters (D) received the ICRS in 1 eye. After 6 months, 51 of these patients received the ICRS in the contralateral eye. The total number of eyes investigated was 125. The outcome measures were uncorrected and best-corrected visual acuity, predictability and stability of the refraction, refractive astigmatism, contrast sensitivity, and endothelial cell morphology. RESULTS: The 89 eyes with 12-month follow-up showed significant improvement with uncorrected visual acuities of 20/16 or better in 37%, 20/20 or better in 62%, and 20/40 or better in 97%. Cycloplegic refraction spherical equivalents showed that 68% of the eyes were within +/- 0.50 D and 90% within +/- 1.00 D of the intended correction. Refractive stability was present by 3 months after the surgery. Only 1 patients had a loss greater than 2 lines or 10 letters of best spectacle-corrected visual acuity, but the patient's acuity was 20/20. Refractive cylinder, contrast sensitivity, and endothelial cell morphology were not adversely affected. The ICRS was removed from the eyes of 6 patients. Three removals were prompted by glare and double images occurring at night; 3 were for nonmedical reasons. All patients returned to within +/- 1.00 D of their preoperative refractive spherical equivalent, and no patients lost more than 1 line of best corrected visual acuity by 3 months after ICRS removal. CONCLUSION: The ICRS safely and reliably corrects myopic refractive errors between -1.00 and -4.50 D.
机译：目的：研究了角膜内角膜环节段（ICRS）在校正中低度近视屈光不正中的安全性和可靠性。方法：最初，74眼等效屈光度在-1.00到-4.25屈光度（D）之间的患者接受了1眼ICRS。 6个月后，其中51例患者的对侧眼接受了ICRS。研究的眼睛总数为125。结果指标未经矫正和最佳矫正的视力，验光的可预测性和稳定性，屈光散光，对比敏感度和内皮细胞形态。结果：随访12个月的89眼表现出明显的改善，未矫正视力为37％，20/16或更高，62％为20/20或97％为20/40或更高。眼周屈光度等效球镜显示，有68％的眼睛在预期矫正的+/- 0.50 D之内，有90％的眼睛在+/- 1.00 D之内。术后3个月出现屈光稳定。只有1例患者的视力丧失大于2行或10个字母的最佳眼镜矫正视力，但患者的视力为20/20。屈光柱，对比敏感度和内皮细胞形态均未受到不利影响。从6例患者的眼睛中取出了ICRS。夜间眩光和双重图像提示进行了三次清除; 3出于非医学原因。所有患者均恢复至术前屈光度当量+/- 1.00 D之内，并且在移除ICRS后的3个月内，没有患者损失超过1行的最佳矫正视力。结论：ICRS安全可靠地校正了-1.00至-4.50 D之间的近视屈光不正。

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