Patent ID: 8679064

Claim:
An apparatus, comprising: a cannula configured for insertion into an eye; an overcap affixed to the cannula; wherein the cannula or the overcap includes at least one tab and wherein the other of the cannula or overcap includes at least one slot, wherein a tab of the at least one tab extends along less than three hundred and sixty degrees of a peripheral of the cannula or the overcap and wherein a slot of the at least one slot terminates in an overlapping portion of the peripheral of the cannula or the overcap that does not include the tab; wherein the overcap is affixed to the cannula by the at least one tab being received in the at least one slot; wherein the overcap is configured not to rotate relative to the cannula; and a seal between the cannula and the overcap, wherein the seal is configured to allow passage of a surgical tool into the cannula through a slit in the seal while inhibiting fluid flow through the seal when the surgical tool is not present in the seal.