Abstract: An ophthalmoscopic prism, for example a gonioscope, has an optically transparent body, the distal end carries a viewing surface preferably oriented perpendicularly to the optical axis of the body, the proximal end of the prism carries a concave surface having a curvature similar to the curvature of the cornea of a patient. The proximal end has at least one planar surface extending outwardly and distally from a location adjacent the periphery of the concave surface. The body has an index of refraction that provides total internal reflection to a viewer looking through the viewing surface even when the planar surface is at least partially wetted with a fluid.

Abstract: An ophthalmoscopic prism, for example a gonioscope, has an optically transparent body, the distal end carries a viewing surface preferably oriented perpendicularly to the optical axis of the body, the proximal end of the prism carries a concave surface having a curvature similar to the curvature of the cornea of a patient. The proximal end has at least one planar surface extending outwardly and distally from a location adjacent the periphery of the concave surface. The body has an index of refraction that provides total internal reflection to a viewer looking through the viewing surface even when the planar surface is at least partially wetted with a fluid.

Abstract: An ophthalmic lens having two elements, a contact lens and an entry lens. The lens produces a magnified aerial image of the fundus of the eye, and can also be used for laser delivery to the fundus. The lens is particularly useful because it provides high magnification and detail of the fundus as well as excellent steroscopic field.

Abstract: An ophthalmic lens which has three elements, a contact lens, a center lens, and an entry lens. The lens produces a magnified aerial image of the fundus of the eye. The lens is particularly useful because it provides high magnification and detail of the fundus as well as good stereoscopic field.

Abstract: An ophthalmic lens which has three elements, a contact lens, a center lens, and an entry lens. The lens produces a wide field, aerial image of the fundus of the eye. The lens is particularly useful because it provides high resolution of the peripheral retina, and causes little or no distortion of the laser beam used for peripheral fundus laser treatment.

Abstract: A contact lens for use in connection with transscleral cyclophotocoagulation. The lens has a planar entry surface and a frustoconically-shaped exit surface that contacts the sclera surrounding the cornea. The central portion of the lens is opaque to prevent stray laser light from entering the optical portion of the eye during laser application.

Abstract: An attachment for a slit lamp that permits the operator to view the superimposition of an image of a patient's eye and a second image that may comprise a fluorescein angiogram or other photographic image of the patient's eye, or an image formed by a CRT or other display system. The slit lamp includes an objective for forming the first image directed along a first optical path, an eyepiece, being attachable to the objective such that the eyepiece is positioned along the first optical path. The attachment includes a body, a beamsplitter, and an image forming system. The body includes an attachment for attaching the body between the objective and viewing means, and also includes a passage through which the first image can pass along the first optical path to the eyepiece. The beamsplitter is mounted in the body, and positioned in the first optical path. The image forming system projects the second image onto the beamsplitter, such that a portion of the second image is reflected along the first optical path.

Abstract: An ophthalmic lens utilized for observing the fundus of an eye using through the lens illumination and for delivering a focused laser beam to the fundus includes a contact lens and an aspheric entry lens. In combination, the lenses provide an aerial image of the fundus anterior to the entry lens.