Method 7 - Citadel FXOverview The FX Classic lens is a remarkable feat of engineering that was developed in collaboration with Carl Zeiss Laboratories, ophthalmologists, optical physicists, and an electrical engineer. Its purpose is to ensure your eyes remain comfortable and protected while exposed to bright white full spectrum LED lights and CMH LEC lamps without any spots. The lens boasts an anti reflective coating that reduces glare, while its infrared reduction