You can see right through them

PANES

["Glass sections often found in windows or doors."]

The clue "You can see right through them" hints at something transparent, like glass. "Panes" refers to individual sheets of glass in windows, which you can literally see through. The wordplay is straightforward, using the double meaning of "see through" to suggest both transparency and understanding. The answer fits because panes are common objects that fit this description perfectly.