Doubled eyelids on wheat cents: What to look for?
The first image has some information to read on these, but what I forgot to add that subject is that the angle of these are almost exactly like the angle of the eyelid.

There was some speculation that the 1910 cents had a doubled eye, but the case was that the near vertical lines were not doubling, but just lost detail off the die from die wear.
So I hope This information will help. This is not all of the doubled eyelids. Just information I already had loaded on my image host at the time.

Memorial cents:

How do the compare when view next to a normal cent:

As mentioned by Wexler:
Quote:Quote from doubleddie.com:
Very Minor Doubled Die Varieties: Doubled dies in this category tend
to show very little doubling. Often all that can be seen are some split
serifs or some notched corners to some of the letters. Many of the
Lincoln Cent "doubled eyelid" varieties fall into this category as well.
They may have relatively wide spreads, but show only a very small
doubled image. Usually high magnification is required and only the
hardest of doubled die collectors will go after these.
So keep in mind also that the angle is the clue. Why is this a concern? Because die wear can show a line that looks like a doubled eyelid, but they are not doubled eyelids. The angle is horizontal instead of at an angle matching the eyelid. Note this angle:

Note that these are not matching the eyelid angle:

Just part of die flow on that area.

Seems like they phased out about 1963. But there could still be some?
The 1992 is one that is called a doubled eyelid. But I feel it is a die chip.

The side by side helps a bit on this one. But feel free to add what ones you like as well. We'll try to cover all bases.
CoopHome : Eyelids