Impaired vision is associated with reduced N75 amplitude.

<p>Box plot showing the distribution of the N75 amplitude in eyes with intact and impaired preoperative visual function. The median N75 amplitude for the intact vision group (3.92±4.09 μV, range 1.78 to 19.39 μV) was higher than that of the impaired vision group (2.03±1.16 μV, range 0.68 to 5.03 μV). Mann-Whitney <i>P</i> < 0.001.