। ॥ १४१ ॥
In plain words
Here too, the Self has to be present, working through the eye, for seeing to happen at all. Otherwise — if that weren't true — why would a blind man, even with plenty of light around him, still fail to see anything?
Close to the Sanskrit
There too, through the doorway of the eye, if the Self were not present as a helper — if that were not so — then, even when light exists, why would a blind man not see objects?