Ok, so I've searched the forums and can't seem to find any topic that covers this. I'm not sure if I'm going crazy, or if it's an actual problem with my screen, but I've never noticed anything like this on my iPad/iPhone/or even the previous 13' rMBP that I initially bought then returned for the larger 15' model. I bought the computer about a month or so ago. Almost immediately, I noticed that when I'm reading things on a white background (pages, word) I see a fine "mesh" effect over the white screen. This is a new computer, so it's not dirt. I'm also hesitant to blame my eyes, as I bought a 13' rMBP first, found the screen size too small, then exchanged for the larger model. I never noticed any such effect on the 13 inch model. Is there a screen resolution difference between the two? A quick wikipedia search shows that the 13' retina screen actually has a slightly higher dpi than the 15', but I can't believe that my eyes are actually perceiving such a minute difference. It also appears more pronounced/most noticeable in the left lower quadrant of the screen. Should I take this in to be "looked at"? Is this a known issue?