Tsukamoto M, Nakajima T, Nishino J, Hara Y, Uozato H, Saishin M
Department of Ophthalmology, Nara Medical University, Japan.
Optom Vis Sci. 2001 Oct;78(10):763-8. doi: 10.1097/00006324-200110000-00016.
To measure the changes in astigmatism and in the degree of anisometropia when ametropes respond to accommodative stimulation.
The accommodative responses of ametropes were binocularly measured with an improved photorefractometer (PR-1100), which objectively measured binocular refraction in all meridians simultaneously, when a visual fixation target was shown in natural space at 5 and 0.5 m.
(1) Changes of astigmatism and anisometropia occur during binocular accommodation. (2) Changes of astigmatism mainly result from lag of accommodation in the horizontal meridian. (3) Changes of anisometropia result from the effort to focus. (4) The interaction of both eyes is suggested as the cause of the changes of astigmatism and anisometropia with accommodation. (5) In the majority of strong anisometropes (nonoverlapping group in this paper), the magnitude of anisometropia decreases (approaching isometropia) with accommodation.
Changes in astigmatism and anisometropia can occur during accommodation, and these interactions of both eyes with accommodation may contribute to the development and maintenance of binocular function.
测量屈光不正者对调节刺激作出反应时散光和屈光参差程度的变化。
使用改进的 photorefractometer（PR - 1100）双眼测量屈光不正者的调节反应，当在自然空间中5米和0.5米处显示视觉注视目标时，该仪器可同时客观测量所有子午线的双眼屈光。
（1）双眼调节期间会出现散光和屈光参差的变化。（2）散光变化主要源于水平子午线的调节滞后。（3）屈光参差的变化源于聚焦努力。（4）双眼的相互作用被认为是散光和屈光参差随调节发生变化的原因。（5）在大多数强屈光参差者（本文中的非重叠组）中，屈光参差程度随调节而降低（接近等屈光状态）。
调节期间可发生散光和屈光参差的变化，且双眼与调节的这些相互作用可能有助于双眼视功能的发育和维持。
