If you find that your retina screen is getting funky looking, Apple has a quiet repair program that might be for you.
In general, though, it seems Apple is trying to keep news of the problem quiet. There is no public acknowledgement of such a program existing on Apple’s website. Apple is contacting people who have reported the problem earlier in the year and were turned away, however. If you have problems like those shown in the picture above (although that’s an extreme case), you should now be able to take your laptop to the Apple Store for a straightforward repair.
AppleCare coverage is not necessarily required with several people successfully getting screen repairs/replacements who are officially out of warranty. If you believe you are affected by this problem, call Apple Support or visit an Apple Store or authorized reseller for support.