Improvement of the Measurement Accuracy and Speed of Pupil Dilation as an Indicator of Comprehension

While web-based learning has been given the opportunity of education to many people, it suffers many problems of its own, such as online teaching methods and materials. One of the most difficult of these problems is the general inability of web-based learning systems to measure (and maintain) levels of comprehension among web-based learners. Although webcam-based measurement of blinking frequency can give us some indication of a subject's concentration level, it does not work so much as an indicator of the level of comprehension has been found. We have shown that pupil diameter is valid as an indicator of the level of comprehension, but from the initial experiments, we showed that the measurement is very difficult. In this study, we investigated the improvement of measurement accuracy and shortening of the time of pupil diameter calculation, polarizing filter showed play an important role