Blue control Coating is a filter built into optical lenses to neutralize the blue light emitted by LCD and LED screens, digital devices, fluorescent and LED lights. The filter helps prevent eye fatigue and eye strain. If you spend a lot of time in front of digital devices, blue control lenses provide more comfortable vision and better contrast perception.
Once lenses are scratched up, there is no way to buff that scratch out. Lens Cleaning Solution, warm water and a dry cloth are all you need, once a day, to keep glasses optimally clean and functional.
And Of Course, never try to hold your frames with your lenses, they tend to leave fingerprints and blurry vision.