Noncontact type tonometer
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United States of America Patent
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-
Oct 10, 1989
Grant Date -
N/A
app pub date -
Aug 19, 1987
filing date -
Aug 21, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A noncontact type tonometer includes a fluid discharging device for discharging a fluid towards the cornea of an eye to be tested; an alignment detecting device for detecting an alignment between the axis of a fluid discharge of the fluid discharging device and the vertex of the cornea and for outputting an alignment signal; and a controlling device for determining whether or not the alignment has been completed upon receipt of the alignment signal from the alignment detecting device and outputting an alignment completion signal when the alignment has been completed. A fluid discharge of the fluid discharging device is automatically performed based on the alignment completion signal. The controlling device is provided with a monitoring device for monitoring the establishment of the alignment completion state for a predetermined time based on the alignment completion signal and outputting an action command signal for automatically performing the fluid discharge towards the fluid discharging device only when the alignment completion state has been maintained for the predetermined time.
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