A Study for Objective Measurement of the Senile Dementia by Light-Reflex

Abstract

In this paper, the difference of light reflex between the normal and the senile dementia is studied by using light-stimuli. The senile dementia patients show us smaller changes (p<0.01) and longer delay times (p<0.05) than the normal elders when their pupils are lightened by pocket-light. The results may be applied to the new objective method to evaluate the senile dementia.