Abstract: An implant (1a) for drainage of aqueous humour in glaucoma comprising an episcleral plate (2) having an elevated peripheral ridge (3) and a drainage tube (4) for insertion into the anterior chamber of the eye which has an opening (8) to the upper surface of the episcleral plate (2). A secondary elevated ridge (7) divides the ridged area on the upper surface of the plate (2) into two areas with the opening (8) of the drainage tube (4) located within one area. Preferably the area in which the tube opening (8) is located is significantly smaller than the remaining area of the episcleral plate (2).

Abstract: A visual image screener for determining abnormality in living eyes particularly of infants and small children which has essential components of:(1) A light source consisting of a narrow annular reflector illuminated by an electronic flash tube.(2) A special photographic objective lens in which the first component of the lens is the limiting aperture of the system.(3) A flashing fixation light placed exactly on the optical axis.These components are assembled with the annular reflecting light source surrounding the camera objective so that the inner sharp edge of the reflector forms the limiting aperture of the entire lens system. The first component of the lens is perforated to permit the fixation light to be mounted in the optic axis and in the same plane as that occupied by the reflecting annulus or slit. These components are mounted on a standard single lens reflex camera body with a focal plane shutter.

Abstract: Ridged plates, concave on one side, match the curvature of the sclera of an eyeball to which they are fitted in side by side fashion. The plates each include an outwardly projecting ridge encompassing a space. A first tube extends between the plates to communicate the spaces and a second tube communicates one space through the sclera with the interior chamber of the eye.