Laser in situ Keratomileusis for Overcorrection After Radial Keratotomy

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Abstract
PURPOSE: To evaluate laser in situ keratomileusis (LASIK) for induced hyperopia after radial keratotomy. METHODS: Twenty eyes had LASEK for induced hyperopia after radial keratotomy. All eyes were treated using the Nidek excimer laser (EC-5000) and the Hansatome microkeratome with a 905-mm ring and 180-mm plate. Hyperopic correction was done using a 5.5 to 7.5-mm ablation zone. RESULTS: Mean preoperative spherical equivalent refraction was +3.44 ± 1.25 D (range, +0.88 to +6.00 D). Postoperatively, all eyes achieved a reduction in hyperopia. At follow-up (range, ß to 24 mo), mean refraction was -0.66 ± 1.00 D (range, -2.25 to +1.50 D). At the last examination, 11 eyes (55%) were within ±0.50 D, 16 eyes (80%) were within ±1.00 D, and 19 eyes (95%) were within ±2.00 D of emmetropia. In terms of best spectacle-corrected visual acuity, 10 eyes (50%) saw 20/20 or better, 16 eyes (80%) saw 20/25 or better, and 18 eyes (90%) saw 20/40 or better. Regarding loss and gain of visual acuity lines, 11 eyes (55%) lost no lines, 2 eyes (10%) lost more than 2 lines, 1 eye (5%) lost 2 lines, 3 eyes (15%) lost 1 line, 1 eye (5%) gained 1 line, and 2 eyes (10%) gained 2 lines of visual acuity. Keratometric power increased from a preoperative mean of 37.32 ± 2.44 D (range, 33.80 to 43.13 D) to a postoperative mean of 39.64 ± 1.81 D (range, 37.42 to 43.74 D). Complications included 4 eyes with incisions that opened without any risk to the patient and in 2 eyes, epithelium ingrowth occurred in the interface. CONCLUSION: LASBK for induced hyperopia after radial keratotomy is safe and effective, without vision-threatening complications. [J Refract Surg 2000;16(suppl):S253-S256]

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