Pasternak T, Merigan W H, Flood D G, Zehl D
Vision Res. 1983;23(12):1409-16. doi: 10.1016/0042-6989(83)90152-9.
Spatial contrast sensitivity was measured over a 6 log unit luminance range in two cats before and after bilateral 4-5 deg radius argon laser lesions were placed in area centralis. The lesions reduced high luminance contrast sensitivity by approximately 0.3-0.4 log units at the low and middle spatial frequencies and by 0.5-1.0 log unit at the highest spatial frequencies. The loss of visual acuity was 0.4 octave in the cat with the smaller lesions and 0.8 octave in the cat whose lesions were larger. At lower luminance, little loss in contrast sensitivity was seen and no change was detectable at scotopic luminance levels. Visual acuity, on the other hand, was decreased at higher scotopic conditions, but unaffected at the lowest luminance levels tested (16 X 10(-6) cd/m2). These data indicate that area centralis plays an important role in detecting both high and low spatial frequencies under high luminance conditions but contributes only to spatial resolution at low luminance levels. This result is consistent with known anatomical and physiological properties of the cat area centralis.
在两只猫的双侧中央凹放置半径为4 - 5度的氩激光损伤前后，在6个对数单位的亮度范围内测量了空间对比敏感度。这些损伤在低空间频率和中等空间频率下使高亮度对比敏感度降低了约0.3 - 0.4个对数单位，在最高空间频率下降低了0.5 - 1.0个对数单位。损伤较小的猫视力损失为0.4倍频程，损伤较大的猫视力损失为0.8倍频程。在较低亮度下，对比敏感度几乎没有损失，在暗视亮度水平下也未检测到变化。另一方面，在较高暗视条件下视力下降，但在测试的最低亮度水平（16×10⁻⁶ cd/m²）下不受影响。这些数据表明，中央凹在高亮度条件下检测高空间频率和低空间频率方面都起着重要作用，但在低亮度水平下仅对空间分辨率有贡献。这一结果与猫中央凹已知的解剖学和生理学特性一致。
