优先注视法(Preferenthal Looking简称PL)。PL 是目前研究得比较深入的一种客观儿童视力检查方法。其理论根据是婴儿喜欢注视有图象的画面,而不喜欢注视均匀的空白画面。将各种不同宽度的黑白条纹与相对空白的画面交替呈现在婴儿眼前,根据婴儿的注视行为及头部运动情况即可测出婴儿的PL 视力。PL 视力值为婴儿所能观看的最窄条纹视角值的倒数(小数记录)或对数(五分记录)。近年来婴儿视力发育情况逐渐引起人们的重视,请求眼科医生检查婴儿视力者日益 Preferentialhal Looking referred to as PL. PL is an objective child’s visual acuity test that has been researched more deeply. The rationale is that babies like to look at images with images, and do not like to look at a uniform, empty image. The various width of the black and white stripes and relatively blank screen alternately presented in front of infants, according to the baby’s gaze and head movement can be measured in infants PL vision. The PL acuity value is the inverse (decimal record) or logarithmic (five-point record) of the narrowest stripe angle value that the baby can view. In recent years, the development of infant visual acuity gradually attracted people’s attention, requesting ophthalmologists to check the baby visually impaired