If you can’t see them, it may be that you have some visual impairment that affects your stereo vision.

如果您看不到它们，则可能是您的视觉障碍影响了您的立体视觉。

For instance, this week I'm working with a vet who suffered serious hearing loss and a woman who has developed a visual impairment.

例如，本周我正在与一位患有严重听力损失的兽医和一位患有视力障碍的女性一起工作。