Abstract: A device for determining the topography of the cornea surface, realizing a method for determining the cornea surface topography, comprises a frame carrying a light source, an objective lens, a light detector, and an array of measuring marks. Said array of measuring marks is a combination of two mark groups, one group being a plurality of ring-shaped marks arranged one after another, axially along the frame and perpendicular to the lens optical axis, while the other group is a plurality of lines arranged lengthwise along the frame to intersect every ring mark and produce, in the light detector, an image consisting of concentric annular patterns and intersecting lines of the radial grid. After a flat image of the array image is obtained, coordinates of image points are measured for specific topographic angles, and corrections are introduced in accordance with the curvature of the radial grid lines.

Abstract: The combined contact lens is characterized in that it comprises a zone of a hydrophilic material, an aperture in the center of said zone, and a solid body from an optically transparent material fixed in said aperture, said solid body being made in the form of a rod bonded chemically with said zone.In the method for the manufacture of the combined contact lens, a hydroxyl-containing monomer is polymerized in the presence of an agent initiating polymerization, a solvent, and a linking agent, inside a mould provided with a rod located in the center of the mould and made from a polymer that is inactive toward water but swells in the solution of the starting hydroxyl-containing monomer.The invention provides good toleration of the lens with the patient and ensures optimum optical effect with various abnormalties of refraction and in various pathological states of the cornea.