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Optotype presenting apparatus
专利权人:
Yuichiro Kanazawa
发明人:
Yuichiro Kanazawa,Tatefumi Oda
申请号:
US12232797
公开号:
US08087781B2
申请日:
2008.09.24
申请国别(地区):
US
年份:
2012
代理人:
摘要:
An optotype presenting apparatus, by which red and green optotypes can be visually perceived independently by right and left eyes even if red filters and/or green filters have different wavelength transmission characteristics, comprises a color display, a unit having a switch for selecting a test chart including visual acuity and red-green binocular visual performance test charts, wherein the binocular test chart includes the optotypes and is used in the test performed with the filters in front of the eyes, a memory storing color adjustment data in which at least one of color tones of the optotypes is varied with the characteristic of one of the filters, a unit for inputting a signal for selecting one of the data, and a unit controlling the display to display the selected chart and adjusting the tones by reading the selected data from the memory when the binocular test chart is selected.
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