Abstract:

If the interpupillary distance does not match the axis distance of one's glasses，the

scene would be deformed，distorted and blurred，and this could result in visual fatigue and

irreversible damage to the eyes. In this paper a measurement scheme by using laser pen，ruler and

mobile phone is proposed. By analyzing the principle of optical imaging，the measurement models of

axis distance in four position cases of laser pen are established，and the calculation formulas of

two glasses with the same or the different degrees are given. Then a platform is built to do ex-

periment，and the factors affecting on the accuracy are analyzed. Tracker video analysis software is

also used to fur- ther reduce the measuring error. Finally，through taking pictures by using mobile

phone，the interpupillary distance is accurately measured. Thus conveniently measuring the

interpupillary distance and the axis distance and accurately judging whether they match or not are

realized.

Key words: glasses, axis distance, interpupillary distance, measurement, Tracker