放射状角膜切开术前瞻性评估（PERK）研究中屈光不正与视力的关系。

Relationship between refractive error and visual acuity in the Prospective Evaluation of Radial Keratotomy (PERK) Study.

作者信息

Santos V R, Waring G O, Lynn M J, Holladay J T, Sperduto R D

出版信息

Arch Ophthalmol. 1987 Jan;105(1):86-92. doi: 10.1001/archopht.1987.01060010092038.

DOI:10.1001/archopht.1987.01060010092038

Abstract

As part of the Prospective Evaluation of Radial Keratotomy (PERK) study, we examined the relationship between post-operative refractive error and visual acuity without correction. We included 394 eyes (one eye per patient) with refractive errors ranging from -3.00 to +3.00 diopters one year after radial keratotomy. Within each 1-D range of the spherical equivalent of the refractive error, the visual acuity spanned five to ten Snellen lines. For visual acuities of 20/16 to 20/50, the refractive error spanned 3 to 5 D. Additionally, operated eyes had a better average uncorrected visual acuity than unoperated eyes with a similar refractive error. Within the narrow range of refraction between -2.00 and -2.50 D, the mean uncorrected visual acuity was 20/125 for 56 unoperated eyes and 20/63 for 29 operated eyes, a difference of three Snellen lines.

摘要

作为放射状角膜切开术前瞻性评估（PERK）研究的一部分，我们研究了术后屈光不正与未矫正视力之间的关系。我们纳入了394只眼睛（每位患者一只眼睛），这些眼睛在放射状角膜切开术后一年的屈光不正范围为-3.00至+3.00屈光度。在屈光不正等效球镜度的每1屈光度范围内，视力跨越五到十条斯内伦视力表行。对于20/16至20/50的视力，屈光不正范围为3至5 D。此外，手术眼的平均未矫正视力优于具有相似屈光不正的未手术眼。在-2.00至-2.50 D的狭窄屈光度范围内，56只未手术眼的平均未矫正视力为20/125，29只手术眼的平均未矫正视力为20/63，相差三条斯内伦视力表行。