| 摘要 |
This suction ring is composed of a ring-shaped body (1) with an incarcerated, bevelled front opening (2), with an anterolateral cannula (4) for connection to a vacuum pump and a dovetail guide (7) on which the microkeratome cutting blade moves. The lateral wall of the body (1) has a tapered truncated conical configuration, diverging backwards for adaptation to the eyeball, in order to increase the suction capacity to the eye. The front area has a wider stepped perimeter (6), which together with a bulge (8) on the outer edge and corresponding to the tips of the guide (7), increases the effective length of the latter, allowing better fixation of the cutting blade. |
