No, cockroaches are not blind, and in fact have a pair of compound eyes which do not provide sharp vision like human eyes, but are very good at detecting the movement of objects in their field of vision.
Their eyes are also well equipped to operate efficiently in dim or very little light, which comes in handy for them since they are essentially nocturnal creatures.
In addition to their eyes, cockroaches have antennas on their body which they used to sense vibrations and movement. Each antenna has tiny hair-like bristles which are very sensitive to minute air vibrations set off by the movement of other animals it in its environment.
So, not only do cockroaches use their eyes to see, they also use these feelers as a secondary set of “eyes” with which to see.