The NTZ-RET-RX-RC offers versatile customization options in the form of multiple integrated configurations and external add-ons. The RX-RC can produce light beams in 3 modalities — divergent, parallel, and convergent — to accommodate the needs of any clinical application. The NTZ-RET-RX-RC uses bulbs with filaments precision-manufactured to a diameter of 0.05 mm to produce one of the sharpest light beams in the industry. Furthermore, the beam can be easily rotated 360 degrees to quickly and effortlessly measure the patient’s astigmatic axis. Notably, the controls for beam rotation and beam width are independent, meaning an ultra-sharp beam will be maintained under any circumstances.