The optics of static photographic skiascopy. Comments on a paper by K. Kaakinen: A simple method for screening of children with strabismus, anisometropia or ametropia by simultaneous photography of the corneal and the fundus reflexes.

The appearance of reflexes in static, photographic skiascopy is a function of myopic or hyperopic focus of the subject relative to the camera, camera to subject distance, subject pupil size, distance of flash relative to optic axis and camera aperture stop. This paper specifies this function.