Install a glass block window using a kit containing plastic spacers and tracking. Use silicone sealant to seal the blocks and prevent air leaks. The distorted blocks provide privacy while allowing light to infiltrate the room.
Measure the window opening carefully and cut the track to fit the bottom, top and sides of the window. Cut enough track from the top of the window so you can slide the final block into place and set the cut piece aside. Use a drill to bore pilot holes through the track into the wood frame and attach the plastic to the wood using screws.
Place a block in a lower corner of the window and add a vertical spacer to the side. Place a second block and spacer beside it. Continue placing blocks until you complete the first course. Add a horizontal spacer and the next row. After sliding the last block into place, apply silicone sealant to the piece of track you set aside and slide it into the opening.
Use the sealant to seal the blocks. Apply it in the horizontal spaces first and then to the vertical ones. Apply sealant to both sides of the windows, using a plastic putty knife to smooth the seams. Wipe any sealant from the face of the blocks with a damp rag before it dries.