lens

-noun; [lenz]

1. a transparent optical device used to converge or diverge transmitted light and to form images.
2. a combination of two or more such pieces, sometimes with other optical devices such as prisms, used to form an image for viewing or photographing.
3. (metaphor) a channel through which something can be seen or understood

i am always watching through a lens, even if, occasionally, it has a few cracks.

help me understand