Vital-Durand F, Hullo A
Bébe Vision, Service d'Ophtalmologie, Hôpital Lyon-Sud, Pierre-Bénite.
Ophtalmologie. 1990 Mar-Apr;4(2):208-11.
Assessment of visual resolution with Teller Acuity Cards is now routine procedure in infant visual check-up. A grating is printed on one end of a card on an homogeneous background of the same mean luminance. A series of spatial frequencies at an interval of one half octave covers the range of infant acuity. Binocular and monocular acuities have been measured on 517 infants between 100 and 399 days of age. The cards can be used from a few weeks of age up to 18 months at least. Then it gets more chancy to keep the child attentive. Binocular and two monocular tests take 6 minutes with a normal child. Binocular grating acuity normally reaches 6.5 cycles/degree at 4 months of age, and 12 c/deg at 12 months. Monocular acuity is one half octave lower. From the level of acuity obtained and observation of the behaviour, amblyopia can be detected and low vision can be estimated easily in infants.
使用泰勒视力卡评估视觉分辨率现在是婴儿视力检查中的常规程序。在卡片的一端，在具有相同平均亮度的均匀背景上印上一个光栅。以半个八度的间隔排列的一系列空间频率覆盖了婴儿视力范围。对517名年龄在100至399天之间的婴儿进行了双眼和单眼视力测量。这些卡片至少可以从几周大用到18个月大。到那时，要让孩子保持注意力就更难了。对于正常儿童，双眼和两次单眼测试需要6分钟。双眼光栅视力通常在4个月大时达到6.5周/度，在12个月时达到12周/度。单眼视力低半个八度。根据获得的视力水平和行为观察，可以很容易地检测出婴儿的弱视并估计其低视力情况。
