Dobson V, Mayer D L, Lee C P
Invest Ophthalmol Vis Sci. 1980 Dec;19(12):1498-505.
Visual acuity was screened in 36 healthy infants born 4 or more weeks prior to term. Preterm infants tested at 8 and 12 weeks of postnatal age showed significantly poorer performances than those shown by 8- and 12-week-old full-term infants. However, no differences in performance were found when the scores of preterm infants tested at 4, 8, and 12 weeks of postterm age (i.e., 4, 8, and 12 weeks from due date) were compared with scores of 4-, 8-, and 12-week-old full-term infants. The results suggest that visual acuity is more closely correlated with age from conception than with age from birth and that visual acuity screening in preterm infants should be carried out with acuity gratings appropriate for the infant's postterm age rather than with acuity gratings appropriate for the infant's postnatal age.
对36名在预产期前4周或更早出生的健康婴儿进行了视力筛查。在出生后8周和12周接受测试的早产儿表现明显比8周和12周大的足月儿差。然而，将孕周龄4周、8周和12周（即从预产期起4周、8周和12周）时接受测试的早产儿的得分与4周、8周和12周大的足月儿的得分进行比较时，未发现表现上的差异。结果表明，视力与受孕年龄的相关性比与出生年龄的相关性更强，并且对早产儿进行视力筛查时应使用适合婴儿孕周龄的视力光栅，而不是适合婴儿出生后年龄的视力光栅。
