FIXING DEVICE

A fixing device, which is used for fixing an electrode array (50) to a retina (101) of an eyeball, and comprises: a first cannula (20), a second cannula (30) and an adhesive (40), wherein the retina (101) encloses a cavity (60), the cavity (60) is filled with an inert gas, the electrode array (50) is located in the cavity (60) and is pre-attached to an inner wall of the cavity (60), the first cannula (20) and the second cannula (30) are fixed to the eyeball at intervals and communicate with the cavity (60), the first cannula (20) is used to input the inert gas into the cavity (60) such that the cavity (60) is filled with the inert gas, and the liquid-state adhesive (40) of the second cannula (30) is injected into the cavity (60) so as to pre-attach the electrode array (50) to the inner wall of the cavity (60). The liquid-state adhesive (40) is used for fixing the electrode array (50) to the inner wall of the cavity (60) after curing, and the retina (101) is in contact with the electrode array (50). The techni