Arffa R C, Marvelli T L, Morgan K S
Arch Ophthalmol. 1985 Nov;103(11):1656-9. doi: 10.1001/archopht.1985.01050110050022.
Keratometric and refractive results of pediatric epikeratophakia showed that patients under 1 year of age had steeper corneas preoperatively and required more correction, as estimated by the Sanders-Retzlaff-Kraff regression formula. The average spherical equivalent of refractive error six months postoperatively was +6.92 +/- 4.67 diopters in patients under 1 year, and -0.72 +/- 4.22 D in patients over 1 year. Three of 14 younger patients and 35 of 54 older patients were within 3 D of emmetropia. Since March 1982, significant undercorrection has occurred only in patients 6 months old or younger. Younger children achieved an average of 46% of the predicted change in corneal curvature, while older children achieved 85%. Also, the Sanders-Retzlaff-Kraff formula may be inaccurate in estimating powers for younger children. Therefore, we recommend at this time that epikeratophakia be used as a secondary procedure in neonates with congenital cataracts.
小儿表层角膜镜片术的角膜曲率计和屈光结果显示，根据桑德斯-雷茨拉夫-克拉夫回归公式估计，1岁以下的患者术前角膜更陡，需要更多的矫正。1岁以下患者术后6个月平均等效球镜屈光不正为+6.92±4.67屈光度，1岁以上患者为-0.72±4.22 D。14名较年轻患者中有3名，54名较年长患者中有35名的屈光不正度数在正视眼的3 D范围内。自1982年3月以来，显著欠矫仅发生在6个月龄或更小的患者中。年幼患儿平均实现了预测角膜曲率变化的46%，而年长患儿实现了85%。此外，桑德斯-雷茨拉夫-克拉夫公式在估计年幼儿童的屈光力时可能不准确。因此，我们目前建议将表层角膜镜片术用作先天性白内障新生儿的二期手术。
