As a child and still to this day, to a smaller extent, I've always found eye contact uncomfortable. I've felt angry at the common received wisdom that people avoiding eye contact is always to do with dishonesty or deceit of some kind.
I went through a period of my life when I was undergoing long-term, extensive psychiatric observation and counselling - not because there was anything wrong with me, but because I was going through experiences beyond my control that were potentially highly traumatising, so it was a sort of damage limitation thing.
We spoke about my avoidance of eye contact and the shrinks all reassured me that it's bullshit that "everyone" prefers or needs to make it when speaking with others, and it's bullshit that not liking it automatically means a person is in some way being dishonest. It can be about "hiding" something, but not anything that you don't have every right as a human entitled to privacy, to hide if you want. Nothing that the shrinks would class as "deceit".
My father was a high functioning autistic and my daughter has Aspies, they said maybe the autism stick passed over me but I still "saw" it and it left an impression - that's the way they put it. Autistic people very often don't like eye contact.
For me, the best I've been able to figure out as to why, is that it makes me feel "invaded". When people insist that I look into their eyes, I feel literally like I'm being mentally and emotionally raped. I feel highly pressured and panicky, and it makes me lose my thread of thought, and puts me totally on edge. Then, whatever I respond to what they're saying is the least likely to be authentically "me" or anything like what I actually want or mean to express - it'll be whatever I feel that person wants me to say, or expects me to say, or whatever will end this situation quickest and get me away from them. And I'll often be wrong about that.
Also, I'm often very out of touch with my own feelings and subconscious, so I panic that the person might "see" something in my eyes that I'm not even aware of myself, and attribute everything I say or whatever, to that. or give it more significance than it really has, so that the true reasons that I know I'm saying what I'm saying, will become lost in that. I try not to make my choices and decisions based on emotions, so if a person wants to look into my eyes as a guide to "seeing" the "true" motives etc behind what I'm saying or proposing to them, they'll be led up the garden path to bark up the wrong tree.
I don't feel like I need to see a person's eyes in order to "read" them as much as is necessary for conversations about most things. Their general body language and voice patterns and choice of words is enough for me. I wish other people would give me the same privacy. I've had to learn to deal with it in everyday life, and cope with it, and to seem to not mind it, but I don't like it, I don't like that I have to. In a way it's ironic that I resort to a form of deceit to cover up the fact that I have an aversion that gives the impression of deceitfulness when I'm actually being honest.