Square blue light filter lens is upgraded from normal computer glasses, perfect for you who uses computer and phones all day for work and was complaining of eye fatigue and pain, redness. you will notice a difference.these are worth it to save your eyes from fatigue with electronic screen use. help with eye strain from computer, tablet, smartphone use for extended periods of time.Square blue light filter lens is upgraded from normal computer glasses, perfect for you who uses computer and phones all day for work and was complaining of eye fatigue and pain, redness. you will notice a difference.these are worth it to save your eyes from fatigue with electronic screen use. help with eye strain from computer, tablet, smartphone use for extended periods of time.