Indirect ophthalmoscopic photocoagulation delivery system for re

Details Indirect ophthalmoscopic photocoagulation delivery system for re Indirect ophthalmoscopic photocoagulation delivery system for re

1984-07-24

1986-04-08

Doll, John

Surgery

Truss

Pad

128395, 128645, 350 9618, 351217, A61B 1736

Patent

active

045805598

ABSTRACT:
In a preferred embodiment, a portable ophthalmoscope having low-power telescope elements and having an internal source of viewed-field illumination, relies on a patient's focusing properties to inspect the fundus of the eye. A laser-beam source is flexibly coupled to the patient end of the ophthalmoscope viewing axis and, after optical expansion and collimation, is folded into coincidence with the ophthalmoscope axis. A dichroic (filter) is the mirror via which the folding takes place, the filter being selected for a very narrowly limited spectral band of great attenuation of radiation at the characteristic wavelength of the involved laser, the latter having been selected for its photocoagulating and/or photoablating action on locally afflicted tissues of the retinal, choroid and/or other internal regions of the eye.

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