Patent ID: 7475987

Claim:
Perimeter for visual field contraction by successively presenting stimuli at various positions in said visual field, comprising: a stimulus presentation unit for presenting said stimuli while gradually changing a luminance, said stimulus presentation unit having indicated position regulating means for regulating a position of said stimulus to be indicated, and indicated luminance regulating means for regulating said luminance of said stimulus to be indicated; operation means for inputting whether or not an examinee can perceive said stimulus; and said indicated luminance regulating means having a standard luminance storing portion for storing a standard luminance at every position of said stimulus to be indicated, a deviation storing portion for storing a deviation at every position of said stimulus to be indicated, the deviation correlating to a p-value and said position of said stimulus, and a luminance control portion for gradually changing said luminance of said stimulus to be indicated on the basis of standard luminance data from said standard luminance storing portion and deviation data from said deviation storing portion, wherein said standard luminance storing portion stores said standard luminance every position of said stimulus to be indicated and every age of said examinee, and wherein said deviation storing portion stores said deviations, every position of said stimulus to be indicated and every age of said examinee; examinee data inputting means for inputting at least ages of said examinees; and a data reading portion for reading proper standard luminance and said deviation out of said standard luminance storing portion and said deviation storing portion on the basis of said age data from said examinee data input means and said data of said position where said stimulus is indicated, and for transmitting said read data to said luminance control portion.