摘要
本文所介绍的普查方法是同时拍摄角膜和眼底反光,其原理基于Hirschberg试验(根据角膜反光)和静态摄影验光(根据眼底反光)。根据所推导的公式,可以精确测算屈光状态。本法敏感度相当高,“盲区”仅为-2D到0D。摄影验光结果与现行常规的检影验光结果基本相符,后者虽然客观准确,但费时且需患者合作。通过初步应用,证明本法适用于儿童斜视、屈光参差和屈光不正的普查。
<ABSTRACT>
It is an urgent problem to screen children with strabismus, anisometr-
opia and ametropia which hinder them in developing visual acuity. The
method must be objective, rapid, inexpensive and casy to manipulate and
analyse without need of any patient's cooperation.
This screening method is to take photograph of corneal and fundus ref-
lexes simultaneously at a distance of one meter. The optical princip1e is
based on Hirschberg test(from the corneal reflex)and static photorefraction
(from the fundus reflex ). With the induced formula, we can measure and
calculate accurately the refractiye state. The method is very sensitive with
the 'blind zone' of only --2D to 0D. The result agrees with that obtained
from the conventional skiascopy, which is objective and accurate yet time-
consuming with need of patient's cooperation. This method was verified by
preliminary application to be suitable for screening children with strabis-
mus, anisometropia and ametropia.
出处
《中国生物医学工程学报》
CAS
CSCD
北大核心
1991年第3期160-166,共7页
Chinese Journal of Biomedical Engineering
