A method of attaching front hook eyeglasses onto an eyeglasses body with safety without producing any play therebetween. In embodiments, the operations can include determining a wagering game player account and determining a social network account associated with the wagering game player account. The improved lines were developed using a new breeding method. The FPGA receives the left-eye signal and the right-eye signal via two paths respectively, and generates a left-image signal and a right-image signal.