A kit is provided, which comprises a) a collagen patch and b) an adhesive composition comprising (i) fibrin, fibrinogen or a combination thereof, and (ii) a biocompatible polymer capable of forming a viscous aqueous solution. Also provided is use of the kit for the preparation of a sealing device for use in ophthalmic surgery to replace a natural lens which has been removed, in which sealing device the collagen patch of the kit is adapted to seal an opening in a capsular bag of an eye while admitting the entrance of an injection device through the opening for injection of a lens-forming material into the capsule; and in which sealing device the adhesive composition of the kit is adapted to be applied to the collagen patch so as to enable adhesion of the collagen patch to the capsular bag. Also provided are methods for sealing an opening in a capsular bag of an eye, in which methods the kit is employed.