Positioning assembly for retaining and positioning cornea

A positioning assembly for retaining, positioning and at least partially exposing a cornea of an eye during a surgical procedure, the eye being disposed in a latitudinally narrowed ocular access. The positioning assembly includes a positioning segment having a retention plate with an aperture defined therein to receive and expose the cornea (C) of the eye, and a flange member disposed about the aperture, a closely spaced apart distance from a latitudinal radius thereof, and structured to engage the eye. The positioning assembly further includes a suctioning assembly associated with the position segment for at least temporarily attaching the positioning segment to the eye, the suctioning assembly including a vacuum port extending vertically from thep ositioning segment and angled outwardly away from a guide track integrally disposed on the retention plate to define an arcuta cutting path for a microkeratome cutting head assembly. A pivot assembly including at least post member is further provided, the post member defining a pivot axis about which a coupling assembly, pivots. 一种定位装置(10)，用于在外科手术过程中对眼睛角膜进行保持、定位和至少部分地暴露，所述眼睛位于在纬度方向狭窄的目镜通路中。该定位装置(10)包括一个定位区段(20)和凸缘元件(24)，所述定位区段(20)包括一个带有限定在其中的孔口(25)的保持板(23)，该孔口(25)用于容纳眼睛的角膜(C)并将其暴露；所述凸缘元件(24)环绕所述孔口(25)而设置，且与其纬度方向半径以靠近的距离间隔开，并构造成与眼睛配合。定位装置(10)还包括一个吸气装置(30)，该吸气装置(30)与所述定位区段(10)相联，用于至少暂时地将所述定位区段(20)附着到眼睛上，所述吸气装置(30)包括一个真空口(32)，所述真空口(32)从定位区段(10)垂直延伸，并离开一体设置于保持板(23)上的导轨(40)向外形成角度，从而限定了一个用于微角膜刀切割头装置(15)的弧形切割路径。还设置了包括至少一个立柱元件(50)的枢转装置，该立柱元件(50)限定了一个联接装置环绕枢转的枢轴。在立柱元件(50)上设置了一个切割起始控制器，用以限定切割头装置(15)的开移动及相应地开始切割的起始点。