Wang Zhong I, Dell'Osso Louis F
The Daroff-Dell'Osso Ocular Motility Laboratory, Louis Stokes Cleveland Department of Veterans Affairs Medical Center and CASE Medical School, Cleveland, Ohio 44106, USA.
Optom Vis Sci. 2009 Aug;86(8):988-95. doi: 10.1097/OPX.0b013e3181b2f2ee.
Infantile Nystagmus Syndrome (INS) is an ocular motor system dysfunction characterized by the rhythmic to-and-fro oscillations of the eyes. Traditionally, the assessment of INS visual function solely focused on null- or primary-position visual acuity. Our purpose is to use the past four decades of INS research to introduce a more complete assessment of visual function in patients with INS.
All eye-movement data were obtained using high-speed digital video, infrared reflection, or scleral search coil systems.
We have introduced four important aspects of a more complete INS visual function assessment: the eXpanded Nystagmus Acuity Function and visual acuity measurements in primary position; broadness of the eXpanded Nystagmus Acuity Function peak and high-acuity field; target acquisition time; and gaze-maintenance capability.
Visual function in patients with INS is multifactorial and the simple assessment of primary position visual acuity is both inadequate and may not be the most important characteristic in overall visual function. A more complete visual function assessment should also include primary and lateral gaze eye-movement and visual acuity examinations, target acquisition time and gaze holding.
婴儿型眼球震颤综合征（INS）是一种眼动系统功能障碍，其特征为眼球有节律的来回摆动。传统上，对INS视觉功能的评估仅聚焦于中和位或原在位视力。我们的目的是利用过去四十年对INS的研究，引入对INS患者视觉功能更全面的评估。
所有眼动数据均使用高速数字视频、红外反射或巩膜搜索线圈系统获取。
我们引入了更全面的INS视觉功能评估的四个重要方面：扩展的眼球震颤视力功能及原在位视力测量；扩展的眼球震颤视力功能峰值和高视力视野的宽度；目标获取时间；以及注视维持能力。
INS患者的视觉功能是多因素的，对原在位视力的简单评估既不充分，也可能不是整体视觉功能中最重要的特征。更全面的视觉功能评估还应包括原在位和侧方注视时的眼动及视力检查、目标获取时间和注视保持。
