| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ocular light stimulus apparatus which enables a wide local ERG examination or a full-field ERG examination in addition to a local ERG examination. <P>SOLUTION: An ocular fundus is irradiated with background light and the stimulus light to stimulate a retina with stimulus light in order to perform a biological examination by bioelectrical signals from the retina. A background light source 11 for irradiating the ocular fundus with the background light and a stimulus light source 51 for irradiating the ocular fundus with the stimulus light are provided. In a first examination mode, the stimulus light is emitted to the ocular fundus in a range narrower than a range irradiated with the background light in stimulating the retina with light. In a second examination mode, the light volume of the background light for the irradiation is increased when the retina is stimulated with the light, and the background light with the increased light volume is emitted to the ocular fundus as the stimulus light in an irradiation range which is approximately the same as the irradiation range of the background light. In this configuration, the local, wide local, or full-field ERG examinations can be achieved by one apparatus. <P>COPYRIGHT: (C)2012,JPO&INPIT |
