SUBJECTIVE OPTOMETER

摘要

A subjective optometer includes a visual target, deflectors, calculator and positioning parts. The visual target is presented a first distance away from eyes. The deflectors deflect first optical paths formed between the eyes and the visual target to form second optical paths causing the eyes to observe the visual target as if the visual target is presented at a second distance shorter than the first distance. The calculator calculates accommodation stimulus amount for causing the eyes to observe the visual target as if presented at the second distance based on convergence accommodation amount of the eyes caused by the second optical paths, the first distance and the second distance. The positioning parts include spherical lenses and position spherical lenses having spherical powers corresponding to the accommodation stimulus amount in the second optical paths. The eyes are examined with the spherical lenses positioned in the second optical paths.

主权项

1. A subjective optometer comprising:
a visual target that is presented at a location a first distance away from eyes; deflectors that deflect first optical paths formed between the eyes and the visual target to form second optical paths for causing the eyes to observe the visual target as if the visual target is presented at a location a second distance away, wherein the second distance is shorter than the first distance; a calculator that calculates accommodation stimulus amount for causing the eyes to observe the visual target as if the visual target is presented at the second distance based on convergence accommodation amount of the eyes caused by the second optical paths, the first distance and the second distance; and positioning parts that comprise spherical lenses and position spherical lenses having spherical powers corresponding to the accommodation stimulus amount calculated by the calculator in the second optical paths, wherein the eyes are examined in a state in which the spherical lenses are positioned in the second optical paths.