Abstract: A reliable method of illuminating and imaging an eye through eyeglasses uses a monochromatic light source with the smallest possible source area, a camera with an imager that exhibits minimal blooming, and a narrow-bandwidth optical bandpass filter to filter out most of the ambient illumination while passing most of the light from the system's own illuminator. In an alternative embodiment, a partially-transparent mirror is used to make the light source appear to be on the optical axis of the camera as viewed from the subject's eye.

Abstract: A system and method of positioning a head of a subject to be photographed by a single camera uses a mirror and at least one collimated light beam. The single camera is positioned so that there is a selected specific location in space within a field of view of the camera at which the head or eye of the subject is desired to be positioned. A light source directs a collimated light beam or light sheet so that the light beam or light sheet intersects a line running from the mirror through the selected specific location in space and can be seen by an eye at the selected specific location in space that is looking at the mirror. The user is told to position his head across from the mirror and move his head until he sees the collimated light beam or light sheet and his eye in the mirror. When the subject is so positioned the single camera can take an image of the eye from which the subject can be identified. If desired a second mirror can be used in place of the light source.

Abstract: An optical element for microscopic inspection of a surface. The optical element has an elongated body defining an optical axis, with a first end adjacent the surface and a second end directed toward an imaging instrument. The body has a curved reflective surface and an optical aperture at the first end, and defines first and second associated focal points on the optical axis. The first focal point is spaced apart from the first end of the body, such that positioning the surface at the first focal point generates an image of the surface at the second focal point. The reflective surface may be paraboloidal, with a concentrating lens focusing collimated rays to the second focal point, so that a conventional microscope may view the image generated at the second point.

Abstract: Multi-layered contact lens element for at least one of examination and treatment of ocular tissues. The multi-layered contact lens element includes a plurality of lens elements in layers including a first lens element having a recess capable of holding a volume of liquid against a cornea of an eye to be examined or treated. Contact lens element for at least one of examination and treatment of ocular tissues includes a lens including a contact surface and an exterior convex surface, the contact surface including a protruding contact ring which forms a recess which is capable of providing a volume for liquid between the lens and a cornea of an eye to be examined or treated when the protruding contact ring is in contact with the cornea. A system for at least one of examination and treatment of ocular tissues includes: an optically clear liquid having a refractive index greater than 1.338; and a contact lens element capable of holding the liquid against a cornea of an eye to be examined or treated.

Abstract: In one embodiment, the present invention provides a method for measuring the movement of an individual's eye comprising the steps of: mounting a first infrared filter in a first eye of an individual, the first infrared filter filtering infrared light at a first wavelength; mounting a second infrared filter in the second eye of an individual, the second infrared filter filtering infrared light at a second wavelength; detecting infrared light of the first wavelength filtered by the first infrared filter by a first sub-array of photodetectors as the first eye of the individual rotates; and detecting infrared light of the second wavelength filtered by the second infrared filter by a second sub-array of photodetectors as the second eye of the individual rotates. The present invention also provides a contact lens comprising: a lens having a central clear zone; and at least one Fresnel ring circumferentially surrounding the central clear zone and filtering at least one wavelength of infrared light.

Abstract: A lens arrangement for use in vitreoretinal surgery includes a contact lens element including a posterior surface having a shape adapted to fit an average cornea for placement on a patient's eye and an anterior surface. The contact lens element transmits light emanating from the patient's eye for viewing a structure of the patient's eye. A flange surrounds and holds a peripheral region of the contact lens element and extends radially onto the scleral region of the patient's eye. The flange has a posterior surface with a shape adapted to fit an average scleral curvature so that the flange rests on the sclera for stabilizing a position of the contact lens on the patient's cornea. The flange includes at least one opening allowing access to an incision through which a surgical tool or instrument may be inserted into the eye.

Abstract: A contact lens for use with pupil monitoring systems. A contact lens has a first surface that conforms to a cornea and sclera of patient's eye, and a second surface that has a tubular extension defining a viewing port formed thereon. A distal region of the tubular extension forms an outwardly protruding lip which functions to securely engage the eyelid of a patient during the monitoring process and facilitates manipulation of the scleral contact lens while it is being inserted in or removed from a patient's eye. The lens may conform solely to the cornea of a patient's eye, and the viewing port may have a wide angle lens, polarizing element or other optical filtering element provided therein.

Abstract: A contact lens for use with pupil monitoring systems. A contact lens has a first surface that conforms to a cornea and sclera of a patient's eye, and a second surface that has a tubular extension defining a viewing port formed thereon. A distal region of the tubular extension forms an outwardly protruding lip which functions to securely engage the eyelid of a patient during the monitoring process and facilitates manipulation of the sclera contact lens while it is being inserted in or removed from a patient's eye. The lens may conform solely to the cornea of a patient's eye, and the viewing port may have a wide angle lens, polarizing element or other optical filtering element provided therein.

Abstract: A method of rehabilitation or training of targeted portions of the brain in which hemi-lenses having semi-opaque radial segments selectively blind portions of the visual processing areas of the brain to force visual processing to a particular portion of the brain which is thereby stimulated. Such rehabilitation consists of having the patient perform visual and non-visual tasks constructed to activate processing in the targeted portion of the brain. The hemi-lenses may be employed in a series of gradually increased translucency to allow the patient's visual system to adapt in stages to the rehabilitated balance between intact visual processing and relearned visual processing.

Abstract: An eye imaging system having a portable image capture unit having a circular light guide positioned adjacent to and behind a corneal contact lens for controlling directing light over a wide field to the retina of an eye and provide more light towards the center of the eye.

Abstract: An indirect ophthalmoscopy lens device is provided for use with a slit-lamp or other biomicroscope for examination, laser treatment or surgical treatment of a patient's eye. The device comprises an image forming lens system for collecting and focussing light exiting a patient's eye to form a real image of the fundus of the patient's eye at a location outside the eye and anterior of the image forming lens system. An anterior lens having a convex anterior surface is disposed anterior to the image forming lens system so that the real image formed by the image forming lens system is located posterior of the convex anterior surface. The convex anterior surface of the anterior lens refracts chief rays of light ray bundles of the light exiting the patient's eye generally toward a collecting lens of the slit-lamp or other biomicroscope.

Abstract: The invention is directed to an ophthalmoscopic or gonioscopic lens system as well as an adapter lens systems for use with such an associated lens apparatus. The indirect ophthalmoscopy lens of the invention for use in examination or laser treatment of a patient's eye comprises a hand-held, pre-set or fixed system having at least two lens elements, each having first and second surfaces. At least one of the lens elements includes an aspheric surface of revolution. The at least two lens elements are positioned adjacent one another in a housing, such that the refractive properties of each are combined to converge light from an illumination light source to the entrance pupil of the patient's eye to illuminate the fundus thereof and form a fundus image to be viewed. The adapter lens systems of this invention are designed for use with an associated ophthalmoscopic lens, enabling selective modification of the optical characteristics of the ophthalmoscopic lens system in a predetermined manner.

Abstract: A method and optical articles for improving or modifying human color vision by using a color filter with a spectral transmission .tau.(.lambda.) to compensate for differences between a spectral sensitivity P*(.lambda.), D*(.lambda.), T*(.lambda.) of an eye with impaired color vision and spectral sensitivity P(.lambda.), D(.lambda.), T(.lambda.) of an eye with normal color vision. The optical article may be realized as an eyeglass, a contact lens or an intraocular lens, or by any other optical implement placed between the eye and the object to be viewed.

Abstract: An indirect, contact ophthalmoscopy lens device for use with a slit lamp or other biomicroscope comprises a compound contact lens element and an image forming lens system. The compound contact lens element includes a posterior lens portion having a concave posterior surface with a curvature corresponding to a curvature of an average cornea and anterior lens portion having a convex anterior surface. A middle lens portion is disposed between the posterior and anterior lens portions and has an index of refraction that is different from the index of refraction of air and is different from the index of refraction of each of the posterior and anterior lens portions. The middle lens portion includes a posterior surface that conforms with intimate contact to the anterior surface of the posterior lens portion and an anterior surface that conforms with intimate contact to the posterior surface of the anterior lens portion.

Abstract: An indirect ophthalmoscopy lens device includes a plurality of lenses for collecting light emanating from a patient's eye and focussing the light to form a first, real, inverted image of the fundus of the patient's eye outside of the eye, and for reinverting the first, real, inverted image to form an erect image anterior of the device. The first, real, inverted image, rather than being an aerial image, may be formed at least partially within one of the plurality of lenses of the device. A conjugate pupil image, rather than being located in air as an aerial image of the patient's pupil, may be formed within one of the plurality of lenses of the device.

Abstract: The lens of the invention is specifically designed for use with a slit lamp biomicroscope or operating microscope in the examination or treatment of a patient's eye. The invention consists of one or more coaxial lens elements, with at least one of the lens elements utilizing at least one convex aspheric surface of revolution. The aspheric surface or surfaces utilized are chosen to correct astigmatic imagery of the lens, with the formed aerial image free of excessive field curvature and astigmatism. The lens is held at a distance from the patient's eye pupil corresponding to the secondary focal length of the lens. If the examined eye is emmetropic, and the lens is held in a position wherein the entrance pupil of the lens is conjugate with that of the examined eye, an image of the entrance pupil of the patient's eye will be formed at the pupil aperture of the optical system of the slit lamp biomicroscope used to observe the aerial image of the fundus as produced by the lens.

Abstract: A contact-type ophthalmic lens for use in diagnosis and laser surgery has a contact lens (14), an entry lens (16), and an intermediate lens (18). The lenses are aligned along their optical axes. The anterior surface of the contact lens has an aspheric surface with a high power. The intermediate lens is a meniscus lens with a concave posterior surface and a convex anterior surface. Both surfaces of the entry lens are convex and aspheric. This combination of lenses provides a very wide field of view, allowing regions of the eye anterior to the equator to be readily viewed in an aerial image focused in a plane (50) anterior to the lens system.

Abstract: An eye imaging system having a hand held portable image capture unit connected by cable to a housing. The hand held unit includes a light fiber optic for transmitting light to the eye, imaging and focusing optics, and a charge coupled image device. The connecting housing provides an electrical power source, light source and viewing monitor for viewing an image of the eye.

Abstract: An indirect ophthalmoscopy lens (10) comprises two or more elements (16, 30). The elements (16, 30) are movable by the physician relative to each other to vary the magnification provided in an aerial image (I) of the fundus.

Abstract: A contact lens for viewing the interior of a patient's eye during an argon laser trabeculoplasty (ALT) procedure and for delivering laser energy to desired regions of the trabecular meshwork of the eye. The contact lens is fabricated from a hollow plastic body which is filled with a medium having an index of refraction which is substantially the same as that of the aqueous humor within a patient's eye. Visible and laser light enter the lens by means of a thin window of substantially uniform thickness and exit the lens (thereby entering the eye) at a front face of substantially uniform thickness whose outer curvature is approximately the same as that of the patient's eye. The degree of astigmatic focusing which normally occurs as the visible light and laser beam pass through the contact lens and cornea and into the aqueous humor is substantially reduced.

Abstract: A retroilluminating indirect gonioprism comprising an optical prism, an oblique reflector and light baffle to reduce the intensity of light reflected from the gonioprism anterior surface back toward an observer, and an opaque surface to substantially prevent retinal burns when using the gonioprism with a directed energy beam. Retroillumination of anterior chamber structures is provided by fiber optics incorporated into the gonioprism housing which direct light from an external source into the limbal region of the eye. This retroillumination increases the accuracy of identification of structural landmarks (e.g., the scleral spur) which are important in argon laser trabeculoplasty. A directed energy beam, as from a high energy laser, may be directed through the gonioprism while an eye structure on which the beam is focussed is observed through the gonioprism.

Abstract: An indirect ophthalmoscopy lens system includes a contact lens device and a separate image erecting component. The contact lens device includes a first holder, a contact lens element having a concave posterior surface for placement on a cornea of a patient's eye and a first image forming lens system located anterior of the contact lens element and cooperating with the contact lens element for focussing light emanating from the retina of the patient's eye for forming a real, inverted, aerial image of the patient's retina anterior of the first image forming lens system. The first holder mounts the contact lens element and the first image forming lens system in a fixed relationship to one another.

Abstract: An indirect ophthalmoscopy contact lens device includes a contact lens having a first posterior lens surface with a concave shape substantially corresponding to the shape of an average cornea and an image forming lens for collecting and focussing light exiting the patient's eye and entering the contact lens when in place on the patient's eye for forming an aerial image of the fundus of the patient's eye. The contact lens comprises a compound contact lens element including a posterior lens portion cemented to an anterior lens portion. The posterior lens portion includes the first posterior lens surface and a first anterior lens surface, and is made of a material having a first index of refraction and a first Abbe value. The anterior lens portion has a second posterior lens surface with a shape substantially matching a shape of the first anterior lens surface and a second anterior lens surface having a convex shape.

Abstract: The invention is directed to an ophthalmoscopic or gonioscopic lens system as well as an adapter lens systems for use with such an associated lens apparatus. The indirect ophthalmoscopy lens of the invention for use in examination or laser treatment of a patient's eye comprises a hand-held, pre-set or fixed system having at least two lens elements, each having first and second surfaces. At least one of the lens elements includes an aspheric surface of revolution. The at least two lens elements are positioned adjacent one another in a housing, such that the refractive properties of each are combined to converge light from an illumination light source to the entrance pupil of the patient's eye to illuminate the fundus thereof and form a fundus image to be viewed. The adapter lens systems of this invention are designed for use with an associated ophthalmoscopic lens, enabling selective modification of the optical characteristics of the ophthalmoscopic lens system in a predetermined manner.

Abstract: Ophthalmologic apparatus includes a light source for obliquely directing light beams into an eye to be examined to illuminate a region of interest therein, a lens system for viewing the region of interest, an optical magnifier assembly for magnifying the viewed region of interest, and an image intensifier for intensifying the image of the viewed region of interest. The light source directs light into the eye from opposite sides thereof to intersect in the plane of the region of interest in the eye.

Abstract: An ophthalmoscopy lens system is provided for collecting light rays emanating from a patient's eye and focussing the collected light rays to produce a real, aerial image of the fundus of the patient's eye. The ophthalmoscopy lens system includes a plurality of lens surfaces at least one of which is shaped to provide in conjunction with the other lens surfaces variable image distortion such that the aerial image, as viewed by an observer from a position anterior of the ophthalmoscopy lens system, has an apparent three dimensional concave curvature that imparts to the observer a sense of the actual concave curvature of the fundus being imaged.

Abstract: A method for use in preparing a customized multifocal contact lens includes the step of providing a standard diagnostic contact lens having an annular portion with a concave cornea-fitting posterior surface and a central portion with a predetermined convex anterior surface and a concave aspherical posterior surface of predetermined eccentricity. The diagnostic contact lens is placed on the cornea of a patient's eye so that the fitting surface is in substantial contact with the cornea. The diagnostic contact lens is allowed to align itself with the cornea in an off-center position. Upon an alignment of the diagnostic contact lens in the off-center position, two or more test lenses are disposed in series before the patient's eye to determine a power curve with which the anterior surface of the central portion could be formed to provide optimal near and far vision for the patient.

Abstract: A contact lens for intraocular observation capable of optically recognizing an inner portion of an eyeball by contacting the contact lens on a surface of a cornea of an eye to be inspected through a light ray transmitted through an inner portion of the contact lens comprising: an optical path dividing member provided on an optical path for leading a light ray incident on the inner portion of the contact lens to the eye to be inspected for dividing a portion of the light ray on said optical path; and an index provided at a position approximately optically conjugate with a portion to be observed of the eye to be inspected on a divided optical path divided by the optical path dividing member. The portion to be observed and said index can optically be recognized by at least partially superposing a first image of the index on a second image of the portion to be observed.

Abstract: A high resolution contact lens structure increases the numerical aperture of a long working distance microscope, while correcting the chromatic and spherical aberrations generated at the surface between the lens structure and the cornea. The structure in one embodiment has a front plate element having two parallel flat lens surfaces. A first lens element has a flat first lens surface in contact with the plate, and a concave second surface. A second lens element has a convex first lens surface in contact with the concave second surface of the first lens element, and a convex second lens surface. The lens element thicknesses, lens surface radii and indices of dispersion and refraction of the lenses are selected to increase the numerical aperture of the microscope.

Abstract: A direct viewing picture image display apparatus displays a good picture image with a small amount of light and low power consumption using a laser beam without producing speckle noises. The display apparatus comprises a light source for emitting a laser beam, an optical modulating system for optically modulating the laser beam from the light source in response to a video signal, a scanning system for horizontally and vertically scanning the modulated laser beam from the scanning signal in response to a scanning signal, and a projecting optical system for projecting the scanned laser beam from the scanning system to form an image of the laser beam on the retina of an eye of an observer. Depth information is provided to the laser beam at a suitable stage after optical modulation by the optical modulating system so that a stereoscopic image is displayed.

Abstract: There is disclosed a diagnostic or therapeutic contact lens for use in examination or treatment of the eye of a patient. The diagnostic or therapeutic contact lens comprises a lens body, constructed of a rigid, transparent material, and includes a concave posterior surface to be selectively positioned on the cornea of an eye. The posterior surface will preferably have a curvature substantially conforming to the curvature of the cornea and will be translationally movable on the cornea during observation or treatment to facilitate examination procedures. The posterior surface of the lens body may include channels for permitting the egress of air from between the posterior surface of the lens body and the surface of the cornea of the eye being examined.

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: A measurement apparatus designed to be used in association with the housing supporting an indirect ophthalmoscopy optical system is shown. The optical system may include one or more lens elements contributing to the formation of an aerial fundus image. Exact positioning of the lens elements as well as consistent lens housing dimensions insure accurate location of the aerial image relative to an examined eye. Such positioning may be accomplished by means of a contact lens of given thickness and power, in predetermined relationship with the image forming lens(es), or by means of an adapter positioned on the external eyelid of a patient, with the image forming lens(es) supported therein. A reticle is formed on a transparent disc of glass or other material, and is fitted into a supporting structure which is adapted to be selectively retained in association with the housing of the indirect ophthalmoscopy optical system.

Abstract: An instrument for the examination and/or treatment of the eye having an examination device designed for the examination of the fundus oculi and having a contact eyeglass, which is provided with a lens which can be placed on the eye, the eye-facing surface of the lens being adapted to the curve of the cornea. The lens which is placed on the eye has no spherical power at least in the region of the optical axis.

Abstract: A diagnostic indirect ophthalmoscopy lens device utilized for illumination and observation of the fundus of the eye may include a plus powered aspheric contact element and at least one anterior lens element which may also have aspheric surfaces and/or positive refractive power. The lens elements in combination act to illuminate and form an inverted aerial image of the fundus of the eye. A erecting optical system may be provided to reinvert the image produced by the lenses of the device, which facilitates examining or surgical procedures. The device may be a hand held device to enable easy manipulation, or may be a non-hand held device which maintains its position on the eye to be examined. The device may further include a separate source of illuminating light which allows proper illumination of the eye while avoiding reflections or the like.

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: A thin, flexible, reflecting diffuse material is placed or formed on an anterior surface of a cornea. The material has properties that precisely conform to changes in shape of the cornea. This allows remote sensing of the shape of the cornea by projected fringe contouring.

Abstract: A contact lens comprising a corneal section, a vertical axis, and a shape adapted to maintain the lens at an intended orientation. The lens has either a visible horizontal line segment located in the corneal section perpendicular to the vertical axis and/or three visible radial line segments in the corneal section, the first of the line segments located on the vertical axis, and the second and third segments located on either side of the first segment such that the extensions of the segments would pass through a geometric center of the corneal section forming two 20.degree. angles. The lens is useful for measuring the rotation of an asymmetric lens. Methods for measuring lens rotation using the inventive lenses are also disclosed.

Abstract: A compound diagnostic indirect ophthalmoscopy contact lens utilized for illumination and observation of the fundus of the eye including a plus powered meniscus aspheric contact element and a biconvex aspheric anterior element, each of the lens elements contributing positive refractive power to the optical system and co-acting to illuminate and form an aerial image of the fundus of the eye.

Abstract: The ophthalmological instrument serves for examining the background (7) of the eye with simultaneous determination of intraocular pressure. A transparent contact member (1) has a concavely curved surface (13) adapted to the curvature of the cornea (11) of the eye (6). In the center of this curved surface (13), a transparent pressure transmitting element (25) is arranged which acts on a pressure sensor (23) by way of a cavity (19) filled with a liquid (26). The contact member (1) is designed as an imaging optical component forming together with the observation optic (9) an observation device for examination of the eye background (7).

Abstract: An instrument and method for examining the optic nerve head (34) of a patient's eye (14) is disclosed. The instrument is comprised of a gonioscopic lens (10) a lens system (26) where the lens system (26) directs a collimated beam of light towards a point (32) away from the center line (28) through the gonioscopic lens (10) and eye (14). When the patient fixates on the beam of light (32), the ophthalmologist can examine the optic nerve head (34) through the gonioscopic lens (10).

Abstract: An auxiliary instrument to be used for examining an eye, which is effectively used for avoiding the tip portion of an eye-examining instrument from directly contacting with a cornea, and for guiding the tip portion of the eye-examining instrument. This auxiliary instrument comprises a contact lens portion having a spherical bottom surface which is adapted to be fittingly contacted with the surface of the cornea and an examination surface portion which is to be contacted with the tip portion of the eye-examining instrument; and a guide portion projected outward surrounding the examination surface portion. This guide portion may be prepared separately from the contact lens portion.

Abstract: A slit illuminating apparatus in which slit illuminating light beams can be simply applied to an eye to be examined from different directions of application at a time or with lapse of time.

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 comprising a corneal section, a vertical axis, and a shape adapted to maintain the lens at an intended orientation. The improvement comprises either a visible horizontal line segment located in the corneal section perpendicular to the vertical axis and/or three visible radial line segments in the corneal section, the first of the line segments located on the vertical axis, and the second and third segments located on either side of the first segment such that the extension of the segments would pass through a geometric center of the corneal section forming two 20.degree. angles. The lens is useful for measuring the rotation of an assymetric lens. Methods for measuring lens rotation using the invention lenses are also disclosed.

Abstract: An endothelium attachment for a slit lamp device with a microscope objective to increase the magnification of the slit lamp microscope which can be attached in front of the slip lamp microscope housing. The attachment includes a beam splitter provided between the microscope objective and the primary objective of the slit lamp microscope, this beam splitter being arranged in the optical axis of the primary objective and deflecting at least a portion of the light reflected by the eye to be examined into at least one ocular beam path of the slit lamp microscope, and that the portion of the light passing through the beam splitter impinges upon a measuring and/or recording unit.

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: The present invention concerns a system and a method for stabilizing the image of an object when the motions of that object are small, the motions are either rotatory or straight-line, the object can be contacted. In the case of an eye, a contact element structure contacts the eye and moves with the small rotational movement of the eye. The contact element is mounted to rotate about a pivot point which is outside the eye. The device forms a image of a portion of the eye which does not move laterally with small eye movements. A examining instrument, e.g., a biomicroscope, may be focused on the image. In laser treatment of the retina or other regions of the eye the laser beam can be directed through the system so that the position of the laser beam will be stabilized at the derived point.

Abstract: An adapter for a lens retaining ring and associated indirect ophthalmoscopy lens used by an examiner or practitioner during examination of a patient's eye fundus with a biomicroscope. The adapter includes a body portion for spacing the lens mounted in the retaining ring a predetermined distance from the eye of the patient when the adapter-retaining ring-lens combination is positioned against the eye of the patient under examination. The adapter is adapted to engage the eyelids of the eye under examination, and is so constructed so as to aid in maintaining such eyelids open, and openings are provided in the body of the adapter to aid in preventing fogging of the lens mounted in the lens retaining ring. The adapter may be selectively removable from the associated lens retaining ring (which may be a conventional or known lens retaining ring) or may be integrally formed with the retaining ring.

Abstract: A contact lens is disclosed, especially for the treatment of the frontal eye sections with a laser, the surface on the eye side of which has a radius adapted to the radius of curvature of the cornea, this contact lens exhibiting a reflective surface for enlarging the field of vision.The contact lens has the following features:the reflective surface is a planar area and is arranged in the part of the contact lens wherein the axial distance between the surface on the eye side and the frontal surface is at a maximum,the surfaces on the eye side and on the frontal side form an aplanatic system,the two surfaces almost penetrate each other on the side opposite to the reflective surface.