Dickinson C M
Ophthalmic Physiol Opt. 1986;6(3):303-11.
It has frequently been reported that the spontaneous ocular oscillation in congenital nystagmats is less intense for near viewing than during distance fixation. The reason for this effect was sought, and the influences of monocular adduction, convergence and accommodation acting separately and synergistically were assessed. The frequent assumption that nystagmus intensity (amplitude and frequency) is determined by convergence angle (either symmetrical or asymmetrical) was confirmed, and it was found that binocular viewing was not necessary. An identical effect on nystagmus intensity could be created for distance fixation by the use of base-out prisms, and these were prescribed for constant wear in two congenital idiopathic nystagmats. Although nystagmus intensity was constantly reduced, no concomitant increase in binocular contrast sensitivity or Snellen visual acuity occurred.
经常有报道称，先天性眼球震颤患者的自发性眼球摆动在近视力时比远距离注视时强度更低。研究了这种现象的原因，并评估了单眼内收、集合和调节单独及协同作用的影响。经常有人认为眼球震颤强度（幅度和频率）由集合角（对称或不对称）决定，这一观点得到了证实，并且发现双眼注视并非必要条件。通过使用底向外棱镜可以为远距离注视产生对眼球震颤强度相同的影响，并且为两名先天性特发性眼球震颤患者开具了长期佩戴的处方。虽然眼球震颤强度持续降低，但双眼对比敏感度或斯内伦视力并未随之提高。
