Patent ID: 8702233

Claim:
Vision exercising apparatus comprising: a visual display device; locating means for locating the head of a user at a position to provide a substantially known relationship between the visual display device and the field of view of the user; display position control means for actuating the visual display device to display a temporally modulated visual stimulus at a known display position, the display position corresponding to a specific viewing area of the field of view of the user whilst located in the locating means; user actuable response means actuable by the user to enable a user response to be provided when the user considers the temporally modulated visual stimulus has been viewed during use of the apparatus; further control means to control the display position control means to repeatedly display the temporally modulated visual stimulus at the known display position; and means to collate, for the present user, user response to display of the temporally modulated visual stimulus at the known display position and to evaluate the statistical significance of the user response for that display position; wherein the visual stimulus is temporally modulated by flashing or counterphasing the visual stimulus at a predetermined temporal frequency; wherein the visual stimulus comprises alternating dark and light features contained within a boundary that subtends an angle substantially in the range from 2 to 12 degrees in the field of view of the user; and wherein the further control means controls the display position control means to reduce the contrast of the temporally modulated visual stimulus when the statistical significance of the user response is greater than a predetermined level and increases the contrast of the temporally modulated visual stimulus when the statistical significance of the user response is less than a predetermined level.