| 摘要 |
A fiber optic endoilluminator surgical instrument for projecting illuminating light into an interior of an eyeball includes a finger grip member and an elongated passageway through the finger grip member. A hollow rigid needle, adapted to penetrate into the interior of the eyeball, slidably extends from one end of the grip member. An optical fiber extends through the needle and the grip member, and a lever is connected to the needle for allowing the needle to be moved to and fro with respect to the grip member for varying the amount of optical fiber exposed at an illumination end portion of the fiber. By covering the illumination end portion with the needle, a spot of illumination is provided for viewing a comparatively smaller portion of the interior of the eyeball. By uncovering the illumination end portion, a flood of illumination is provided for viewing a comparatively larger portion of the interior of the eyeball.
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