Harvey E M, Dobson V, Narter D B
Department of Ophthalmology, University of Arizona, Tucson, USA.
Optom Vis Sci. 1997 Sep;74(9):768-74. doi: 10.1097/00006324-199709000-00025.
To provide normative data on the effect of a central competing stimulus on monocular visual field extent in 3.5- to 9-month-olds and adults, and binocular visual field extent in 11- to 30-month-olds.
Visual field extent along diagonal meridia was measured in 180 infants and children (N = 30 at 3.5, 7, 9, 11, 17, and 30 months) and 20 adults, using static perimetry. Stimuli were 3-deg, 10-Hz flickering, yellow light-emitting diodes (LEDs). Each subject was tested with 12 trials in which the central stimulus remained on and 12 trials in which the central stimulus was turned off during presentation of the peripheral stimulus.
A competing stimulus produced a decreased frequency of eye movements at 17 months and evidence suggestive of decreased measured field extent at 17 and 30 months.
A continuously present central stimulus does not produce underestimation of visual field extent in 3.5- to 9-month-old infants with normal vision and adults tested monocularly and 11-month-old infants tested binocularly. However, visual field extent may be underestimated in 1- and 2-year-olds if a competing central stimulus is used.
提供关于中央竞争刺激对3.5至9个月大婴儿及成人单眼视野范围，以及11至30个月大婴儿双眼视野范围影响的规范数据。
使用静态视野计对180名婴儿和儿童（3.5、7、9、11、17和30个月各30名）及20名成人沿对角子午线的视野范围进行测量。刺激物为3度、10赫兹闪烁的黄色发光二极管（LED）。对每个受试者进行12次试验，其中中央刺激在周边刺激呈现期间保持开启，以及12次试验，其中中央刺激在周边刺激呈现期间关闭。
竞争刺激在17个月时导致眼球运动频率降低，且有证据表明在17和30个月时测量的视野范围减小。
持续存在的中央刺激不会导致视力正常的3.5至9个月大婴儿单眼测试时以及11个月大婴儿双眼测试时视野范围被低估。然而，如果使用竞争中央刺激，1至2岁儿童的视野范围可能会被低估。
