I have used two eyetrackers in my lab. Currently I am using a Model 500c, dual-purkinje-image eyetracker manufactured by Fourward Optical Technologies. Warren Ward (president of Fourward Optical Technologies) told me that I purchased the first Model 500c in production (consider this eyetracking trivia). I began using the eyetracker in January, 1998. It works great and looks impressive. Here is a picture.

My first eyetracker was a Dr. Bouis eyetracker (manufactured by Dr. Bouis Devices for Movement Measurement in Germany). I began using this eyetracker in January, 1994. This eyetracker was easy to use and provides excellent horizontal resolution across a limited vertical range. Importantly, it never broke down! Below are pictures of it (two views). My father (Charles Raney) and I designed and built the bite bar mount. It worked so well that several other researchers duplicated it. We also made a stabilizer for the forehead rest (the angled bar attached to the base plate) to strengthen the forehead rest (some people lean on it pretty hard). I added the headstrap to try and reduce head movement. This was only needed for fidgety participants. The control panel is partially visible in the right-hand picture. The monitor stand (a stack of books) was a prototype for the advanced model (a stack of boards) seen in the picture above of the Model 500c eyetracker.