"Eye strain" refers to the discomfort or tiredness you feel in your eyes after looking at something for too long, like a screen or reading material. Full definition
They are primarily aimed at people who suffer from eye strain by staring at a LCD or LED monitor all day and need an E Ink product that is easy on the eyes. (goodereader.com)
This reading light combines a warm light that helps reduce eye strain with the precision angles of two lamp arms. (geekwrapped.com)
Traditional LCD displays have blue light that emits from behind the screen, causing eye strain for long reading sessions. (goodereader.com)