Clinical evaluation of hexagonal keratotomy for the treatment of primary hyperopia

We evaluated the effectiveness of spiral hexagonal keratotomy in correcting primary hyperopia in 199 eyes. One hundred eighty-four eyes (92.5%) had a minimum follow-up of three months. Mean follow-up was 11.9 months and maximum, 36.2 months. Secondary astigmatic keratotomy was performed on 54 eyes six to eight months after initial hexagonal surgery to correct induced astigmatism. The mean reduction in spherical equivalent was -1.6 +/- 0.9 diopters (D) (range -5.6 to +0.9 D). The mean increase in refractive cylinder was +0.5 +/- 0.9 D (range -2.3 to +3.0 D). Uncorrected acuity improved by +3.2 lines, while best corrected acuity decreased slightly by -0.26 lines. Loss of two or more lines of best corrected acuity that was attributable to surgery was between 0.5% and 4.0%.