Do Eye Twitches require a visit to the doctor?...my eyes hav

For as long as I can remember, I have had strange twitches (friends and relatives describe it as a "flutter") with both my eyes. I have rarely been able to notice them and can't control them myself, or else voluntarily "flutter" them when asked to. I don't realize when it happens, (except for sometimes if it's really bad, then things go sort of dark like I'm blinking for a prolonged period of time), and I can't watch it in a mirror, but I have been told that my eyes sort of roll back and my eyelids flutter up and down really quick. It only lasts a second or so, and I rarely notice when I do it which can be really embarassing. I get asked constantly about what it is, and I have never known. My mom told me that her sister used to do it all the time, but she died young of cancer so I don't really know what to expect from it. I can't say it's been getting worse, but I don't remember it ever happening as a child until I was about 10 years old. I haven't noticed that it happens in specific light conditions, except that once I step outside into the daylight I squint my eyes and I can almost feel that I am doing it a LOT because it gets really dark and I can't see properly for seconds at a time. My mom said it's nothing I should worry about and just a strange reflex, but I am beginning to become concerned about it. Is it something I should get checked out? Thanks.