voir is conjugated as follows:

voir
je vois nous voyons
tu vois vous voyez
elle, il, on voit elles, ils voient

In the singular, the 's' and 't' are not pronounced, so the singular forms are pronounced the same.
In the third-person plural, the 'ent' is not pronounced, so this form is pronounced the same way as the singular forms (just one syllable from all those letters).

Click on a verb form to hear the pronunciation.