Apparatus for testing temporal vision including a target light produced on a portion of a viewing area. A boundary is provided between the target light and a background light, such being produced on substantially all of the viewing area. A first oscillator switches the target light on and off while a...http://www.google.fr/patents/US4324460?utm_source=gb-gplus-shareBrevet US4324460 - Method and apparatus for testing flicker fusion frequency
Method and apparatus for testing flicker fusion frequency
