A perimeter according to the invention has fixation state detecting means for detecting a fixation state of an examinee in association with each portion where a stimulus should be presented, and necessity of retest is judged for each stimulus. Even if no good fixation state is detected for some stimulus, it is sufficient to retest the portion where the stimulus was presented. Then, burdens on the examinee or an examiner are lighter and the test time is shorter, and test efficiency is increased thereby.
