Yes I find it easier with sunglasses. If I'm not wearing them I find I tend to avert my gaze from the person as if I'm looking at something or I'm checking my surroundings.
Although I used to be a lot worse, I was told by someone years ago to stare in between the eyes at the top of the nose, as this way you don't have full eye contact, and the other person can't tell you aren't looking at the eyes.
I used to find that I couldn't decide on which eye to look at, and would end up switching between the two. People would generally pick up on this and either think I was very nervous, or they had something on them that I couldn't stop looking at ...
I still have some difficulty, as it usually depends on who I'm dealing with, but I'm a lot better than I used to be.
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Confirmed ASD as of 19/12/17
Your neurodiverse score: 177 of 200
Your neurotypical score: 34 of 200