Benson W H, Goosey C B, Prager T C, Goosey J D
Department of Ophthalmology, University of Texas Medical School, Houston.
Am J Ophthalmol. 1993 Aug 15;116(2):207-11. doi: 10.1016/s0002-9394(14)71287-5.
Twenty-eight keratoconic patients with either contact-lens intolerance or marked corneal scarring over the visual axis underwent lamellar keratoplasty for visual rehabilitation. All 28 patients returned for follow-up at six months, 27 (98%) had follow-up at one year, and 23 (82%) at two years. The 23 patients with two-year follow-up showed progressive improvement of visual acuity over time. At six months, 11 of 23 patients (48%) had visual acuity of 20/30 or better. At one year, 17 of 23 (74%) had 20/30 or better, and at two years, 21 of 23 (91%) had 20/30 or better. The average postoperative keratometry measurement at two years was 43.5 diopters (S.D. = 2.5 diopters), which represented an average reduction of 13 diopters from preoperative keratometry. All patients who were less than 32 years old obtained visual acuity of 20/30 or better after two years and reached this level significantly (F = 6.75, P = .02) sooner than those more than 32 years old. These results compare favorably with previously reported visual results after penetrating keratoplasty.
28例圆锥角膜患者，因不耐受角膜接触镜或视轴区存在明显角膜瘢痕，接受了板层角膜移植术以恢复视力。所有28例患者均在6个月时复诊，27例（98%）在1年时复诊，23例（82%）在2年时复诊。23例有2年随访的患者，其视力随时间逐渐改善。6个月时，23例患者中有11例（48%）视力达到20/30或更好。1年时，23例中有17例（74%）达到20/30或更好，2年时，23例中有21例（91%）达到20/30或更好。术后2年平均角膜曲率测量值为43.5屈光度（标准差=2.5屈光度），较术前角膜曲率平均降低了13屈光度。所有年龄小于32岁的患者在2年后视力达到20/30或更好，且比年龄大于32岁的患者显著更早达到该水平（F=6.75，P=.02）。这些结果与先前报道的穿透性角膜移植术后的视力结果相比更具优势。
