M-cone stimulation induces a pupil constriction to stimulus offset, whereas, with L cones, the pupil responds conventionally with a constriction to onset. To test the possibility that this paradox is linked to the ${\rm L}{:}{\rm M}$L:M ratio, we measured the strength of the effect by injecting a variable amount of positive or negative luminance contamination on either side of M-cone isolation and identifying a balance point at which the pupil responded equally to onset and offset. Nineteen individuals were recruited. In observers with low ${\rm L}{:}{\rm M}$L:M ratio, the paradoxical effect was weak. There was a significant relationship (${{r}^2} = {0.561}$r2=0.561) between the balance point and ${\rm L}{:}{\rm M}$L:M ratio. The effect is likely to be linked to strong inhibitory signals associated with cone-opponent pathways.

中文翻译：

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瞳孔对M锥体发作的异常反应与$ {\ rm L} {：} {\ rm M} $ L：M比率相关。

M锥刺激会引起瞳孔收缩以抵消刺激，而使用L锥时，瞳孔通常会收缩以适应发作。为了测试这种悖论与$ {\ rm L} {：} {\ rm M} $ L：M比率相关的可能性，我们通过在光源上注入可变数量的正或负亮度污染来测量效果的强度M圆锥隔离的任一侧，并确定一个平衡点，在该平衡点上，瞳孔对开始和偏移的反应相同。招募了19个人。在$ {\ rm L} {：} {\ rm M} $ L：M比率较低的观察者中，矛盾的作用很弱。平衡点和$ {\ rm L} {：} {\ rm M} $ L：M比率之间存在显着关系（$ {{r} ^ 2} = {0.561} $ r2 = 0.561）。该作用可能与与锥体对手途径有关的强抑制信号有关。