Wildsoet C F, Cameron K D
Ophthalmic Physiol Opt. 1985;5(2):171-8.
The Sheedy Disparometer is a clinical instrument designed to measure fixation disparity and hence determine forced vergence--fixation disparity curves. The target design includes a central 1.5 degrees fusion-free area. The effect of introducing a central fixation target to the instrument is investigated along with the influence of ambient illumination level on fixation disparity. All curve parameters, i.e. curve type, slope, X- and Y-intercepts were found to significantly alter with the introduction of a foveal lock. Illumination changes did not cause significant differences in any parameter.
希迪视差仪是一种临床仪器，旨在测量注视视差，从而确定强迫性聚散——注视视差曲线。目标设计包括一个1.5度的中央无融合区。研究了向该仪器引入中央注视目标的效果以及环境光照水平对注视视差的影响。发现引入中央凹锁定后，所有曲线参数，即曲线类型、斜率、X轴和Y轴截距均有显著变化。光照变化在任何参数上均未引起显著差异。
