I have experienced that eyes strain much lesser while using a LCD display instead of an LED display. Experienced this pretty much consistently. LEDs start hurting my eyes after some time.

And I use a MBP with Retina display for long hours - and I have to say, it has never put stress on my eyes at all (unless I make the screen too bright). Also I do not work at super-high small font resolutions - that allows me to keep distance from the screen. The only thing that I find better than it is Kindle reader.