Bends and branches in optically transmitting waveguides are studied to determine if the geometry of the bend or branch impacts the transmission of the waveguides. A unitless approach to bend radius makes the study generic for any waveguide bend metric. Optical software is used to determine the properties of the bent or branched waveguides. This study also predicts where leaks occur for a given waveguide. Experimental results prove the value of this computer model.