However , many people can not take advantage of this because of the limited dilation of the human pupil .
Often night glasses also have a fairly large exit pupil of 7 mm or more to let all gathered light into the user 's eye .
Many people can not take advantage of this because of the limited dilation of the human pupil .
Often night glasses also have a fairly large exit pupil of 7 mm or more to let all gathered light into the user 's eye .