Ophthalmic applanator
OwnerRobert M. Johnstoninventor
Life of this patent
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Abstract
An ophthalmic applanator for treatment of corneal lamellar flaps/caps includes a disc having a concave bottom surface with a curvature flatter than the curvature of the external surface of the cornea of the eye and steeper than the curvature of the surface of the sclera of an eye and a concave or convex top surface. The radius of curvature of the bottom surface produces a radiating pressure of higher magnitude centrally than peripherally, but is also curved sufficiently to minimize the risk of excessive indentation of the cornea. The convex or concave upper surface reduces reflection from the operating microscope.
Claims14
An ophthalmic applanator comprising:
- a disc having a concave bottom surface and a top surface selected from the group consisting of a convex surface and a concave surface, said concave bottom surface having a curvature flatter than a curvature of the external surface of the cornea of an eye and steeper than a curvature of the surface of the sclera of an eye;
- and
- a handle attached to said disc.
A method of positioning a corneal flap or cap comprising:
- applying pressure to a corneal flap or cap with an applanator comprising a disc having a concave bottom surface and a top surface selected from the group consisting of a convex surface and a concave surface, said concave bottom surface having a curvature flatter than a curvature of the external surface of a cornea of an eye and steeper than a curvature of the surface of a sclera of an eye, and a handle attached to said disc.
Dependencies are inferred from the claim text.