| 摘要 |
<p>For protection of the otherwise sharp protruding end (29) of a given instrument for use in ophthalmic or other surgery, as when the instrument is to be used only after it has traversed the major part of a scleral tunnel, a shiftable guard or shield (28) is manipulable after it has served its function of avoiding damage to hemorrhageable tissues adjacent tunnel-wall tissue, thereby exposing the sharp end (25) only after safely passing the hemorrhageable region. Various embodiments are described.</p> |
