Vergence and Accommodation: II. Is Accommodative Vergence Related Merely to the Accommodation Stimulus?

摘要: When the normal observer fixates with one eye from far to near 1 or suddenly accommodates through a minus lens, 2 occluded moves nasalward. The basic physiology of this synkinesis is still not well understood. 3 Clinicians 4,5 seem be convinced that associated vergence related accommodative effort , but Christoferson and Ogle 6 7 imply change merely in stimulus accommodation. Although difference between two concepts clear enough, it difficult arrive at some concrete experimental procedure which would allow choose them, largely because an inability establish operational definition agreeable all concerned. Accommodative stimulus, on other hand, can operationally defined, for present paper will represent magnitude