Abstract: A specialty eyewear device including an optical frame that carries a pair of highly reflective surfaces that permit a wearer to experience an angular offset between the direct line of vision and the effective line of vision. No refraction occurs in the performance of the device, and no image reversal takes place. Modifications of the invention allow for certain angular adjustments in the device which can both change the actual angular offset which occurs between direct and effective line of vision, and permits angular rotation of a given angular offset.

Abstract: An improved differential amplifier having circuitry to enhance the slew rate and to provide a means for nulling the offset voltage during fabrication of the amplifier as an integrated circuit. The differential amplifier comprises an input stage connected to a current mirror. A slew rate enhancement circuit injects current into selected points of the circuit when the input voltage exceeds a predetermined threshold. An offset trim circuit injects a selected amount of current into the current mirror to alter the current flow between the input stage and the current mirror, thereby reducing the offset voltage. The selected amount of current is dictated by diodes which may be permanently shorted at various stages during fabrication, both before and after the amplifier is enclosed in an IC package.