Abstract: The present invention relates to a multifocal ophthalmic lens which comprises a first substantially spherical area for distance viewing, a second substantially spherical area for near viewing having a desired width and height and being surrounded on a plurality of sides by the first area, and relatively narrow areas intermediate the first and second areas for blending the second area into the first area. The lens design of the present invention may also include an optional third substantially spherical area adjacent the second area for increasing the near viewing range in a substantially contiguous manner.

Abstract: The present invention relates to a multifocal ophtalmic lens which comprises a first substantially spherical area for distance viewing, a second substantially spherical area for near viewing having a desired width and height and being surrounded on a plurality of sides by the first area, and relatively narrow areas intermediate the first and second areas for blending the second area into the first area. The lens design of the present invention may also include an optional third substantially spherical area adjacent the second area for increasing the near viewing range in a substantially contiguous manner.

Abstract: A combination of a first inner single vision prescription lens component with a select diopter correction and a second outer lens component having a range of diopter values from -0.25 to -2.0 and +0.5 to +2.0, with a minus opthalmic adhesive optically and physically bonding together the anterior surface of the first lens with the posterior surface of the second lens.

Abstract: Apparatus and a method of making an eyeglass lens module in which two lens components are disclosed. The first component is a conventional single vision stock lens having conventional corrections in the negative or positive diopter range. The second lens component is an overlay lens desirably formed from a plastic or glass and is as thin as practical. The overlays are in modules containing bifocals or trifocals or vocational modifications of a given diopter correction. The method of casting the overlaid lens includes aging a mixture of a plastic monomer and an inorganic peroxide catalyst prior to use. The two lens components are then optically and physically bonded together. Once the two lens components are secured to each other, they can then be fitted into a spectacle frame and delivered to the patient. When tinting is required, the plastic overlay can be readily tinted by conventional dye and methods.

Abstract: An eyeglass lens module in which two lens components are formed. The first component is the conventional single vision stock lens having conventional corrections in the negative or positive diopter range and, indeed, for the patient requiring only bifocals or trifocals, the single vision stock lens can be of zero correction. The second veneer over-lay lens component is desirably formed of a plastic or glass material and is as thin as practical so that it becomes a veneer cover. These veneer over-lays are in modules containing bifocals or trifocals or vocational modifications of a given diopter correction. They can also contain special vocational features such as upper bifocals for airline pilots. Once the prescription is developed according to the method of the invention, the optical glass lens blank is then fixtured for receiving the veneer over-lay.

Abstract: Disclosed is a high index of refraction glass base lens in combination with readily castable CR-39 or equivalent plastic veneer overlay. The high index of refraction glass serves to bend light quickly and radically to eliminate the need for excessive lens thickness and curvature, thus reducing the overall mass and weight of the lens. For example: A -10.00 D. prescription lens made from CR-39 plastic requires front and back curvatures totalling -10.60 D. with an accompanying edge thickness at 71 mm diameter of 17.3 mm. This same -10.00 D. prescription lens made from the standard crown glass of the ophthalmic industry (index of refraction 1.523) would require a total front and back curves of -10.00 D. and will have an accompanying edge thickness at 71 mm diameter of 16.5 mm. The subject invention lens utilizes high index of refraction glass, so that a -10.00 D prescription can be made from a lens embodiment whose front and back curves total -6.57 D. with an accompanying edge thickness at 71 mm of 9.1 mm.

Abstract: This invention relates to a reduced magnification, thinner lens structure, and improved vision for an aphakic patient by biconvexing the lens with the occular side of the lens having a correction of +0.25 to +6.00 diopters, and offsetting the tunnel vision effect by a high degree of asphericity and thinning of the lens outside of the central zone on the front of the lens. The lenses are nominally manufactured from four standard blanks of +8 diopters for use with prescriptions between +8.5 and +10.75; a +10 diopter blank for use with prescriptions of +11 through +12.75 diopters correction; a +12 diopter central blank for prescriptions of +13 through +14.75 diopters correction; and a +14 diopter central blank for use with corrections of +14.75 through +20. In each instance the balance of the correction is applied by convexing the ocular surface +0.25 to +6.00 diopters. The asphericity at 60 millimeters on the front base curve of +8.00 is -3 diopters; for a +10 front base curve -5.

Abstract: A prosthetic, aspheric spectacle lens for aphakic patients comprising a posterior surface and an anterior surface having a spherically curved zone and an aspheric peripheral zone surrounding the central zone. The aspheric peripheral zone has an optimized amount of radially decreasing diopter power. An alternative embodiment has a zone intermediate of the central zone and the peripheral zone. The rate of radially decreasing diopter power change accelerates as the outer circumferential edge of the lens is approached.