Methods With Japan-made portable automated retinosc ope, small-pupil optometry was conducted among the preschoolers to detect those with refraction problems, who then were given mydriasis test.

• 方法应用日本尼康手提全自动检影仪对学龄前儿童进行小瞳孔验光,发现屈光有异常的儿童,再进一步进行散瞳检影验光。