Have a great day, hedaxor! Thank you for sharing your useful article. You are right, and sometimes I feel pain in my eyes after looking at my mobile phone or laptop screen, so I decided to buy some coloured contact lenses with an eye saver filter to sustain my eyes in a good state while I'm working. I think a blue filter feature is a good option. Blue color has a good influence on eyes and keeps them healthy for more time. I will try your Eyefilter application shortly and will post my review here if you don't mind.