System for automatically inhibiting ophthalmic treatment laser

Details System for automatically inhibiting ophthalmic treatment laser System for automatically inhibiting ophthalmic treatment laser

1995-12-07

1998-05-19

Shay, David M.

Surgery

Instruments

Light application

606 4, 606 5, 606 13, A61N 506

Patent

active

057529507

ABSTRACT:
A system is provided for use with an ophthalmic treatment laser that produces a treatment laser beam. The system automatically inhibits transmission of the treatment laser beam when a threshold amount of eye movement is detected. An eye movement sensor determines measurable amounts of eye movement such as saccadic eye movement. The eye movement sensor generates light energy that is eye safe, focuses the light energy on the eye, and detects energy reflected from the eye due to the incident light energy. The eye movement sensor determines the measurable amount of eye movement based on changes in the reflected energy. A dichroic beamsplitter is optically disposed between the ophthalmic treatment laser and the eye to direct the treatment laser beam to the eye. The beamsplitter is also optically disposed between the eye movement sensor and the eye to direct the sensor's light energy to the eye and the resulting reflected energy back to the sensor. When the measurable amount of eye movement exceeds the threshold amount, control logic outputs a treatment laser inhibit signal to the ophthalmic treatment laser.

REFERENCES:
patent: 4438765 (1984-03-01), Wilinsky
patent: 4443075 (1984-04-01), Crane
patent: 4702245 (1987-10-01), Schroder et al.
patent: 4972836 (1990-11-01), Schenck et al.

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