I have two instances to report about eyes - although I wouldn't characterize them as reptilian...
The first is where I was in a group with my brothers friends, and we were all in a circle talking, and I happened to look at this one guy who was in the distance from the rest of the group, and he was just glaring at me with this angry look on his face - and his eyes were red! After a brief time he noticed I was focused on him and his facial expression changed, and eyes returned normal - back to his easy going demeanor.
The second time was with my mother of all people, and I was visiting her at her home, and she comes up to me as I was sitting, bends over to get face to face with me, pulls her glasses down, looks me in the eye, and her eyes were this zombie-like gray that I couldn't stand to look at, so I turned away and as awful as it seemed, it didn't really scare me as you might think - I guess it's because I'm more on my fathers side than her, and I've always been independent, and sometimes defiant from her.
But I know what you mean about reptilian eyes... there was some politician on tv that had reptilian eyes. I don't know if it was a stunt, but it was shortly after television went digital, and you could see the reptile pupils plain as day.