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Contact lensContact lens description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070273834, Contact lens. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION [0001] The present invention relates to contact lenses includes both homogenous lenses, and hybrid hard-soft contact lenses. More particularly, the invention concerns contact lens construction features and methods of fitting and prescribing a contact lens. BACKGROUND OF THE INVENTION [0002] Vision correction is on the verge of a revolution. New technologies to measure the aberrations or distortions in the optics of the eye will soon be available to the public. These new wavefront measurement techniques such as Shack-Hartmann wavefront sensing or Talbot Interferometry can precisely measure the eye's aberrations so that vision may be corrected up to 20/10. Wavefront sensing is the method for rapidly, and very accurately, assessing the aberrations in an individual's eye to create a customized prescription for correction. [0003] However, once the eye's aberrations have been measured, either by conventional methods or by wavefront sensing, these measurements must then be transferred into a vision correction system, such as eye surgery, spectacles, or contact lenses. Recent advances in laser refractive surgery techniques such as LASIK and photorefractive keratectomy, as well as improvements in spectacle lens manufacturing now enable the creation of highly accurate corrective prescriptions for individuals. [0004] However, this is not the case with contact lenses. Popular soft contact lenses cannot achieve the same result as spectacles or laser refractive surgery because of dimensional variations in contact lens fabrication. Hard contact lenses, which may provide the platform to achieve the results of spectacles, are not as comfortable as soft contacts and generally lack the necessary positional stability on the eye. [0005] Therefore, there exists a need for a contact lens that aid in the generation of an accurate corrective prescription and that can provide a stable platform for the prescription. SUMMARY OF THE INVENTION [0006] A contact lens is provided. One embodiment of the present invention provides a method for fitting and prescribing a contact lens. Another embodiment of the present invention comprises a contact lens construction that provides a stable corrective prescription platform. Yet another embodiment comprises a contact lens that is constructed to accommodate ectasia associated with keratoconus. [0007] For example, in one embodiment, a contact lens constructed according to the present invention comprises a central portion including an optical zone, and a peripheral portion surrounding the central portion. The peripheral portion has a first thickness, and it includes at least two areas of unequal size, with each area having a thickness less than the first thickness. Alternatively, one area may have a thickness less than the first thickness, and the second area may have a thickness greater than the first thickness. This contact lens construction provides a platform that resists rotation, thereby maintaining the contact lens in the desired rotational orientation on an eye. [0008] These and other features and advantages of the present invention will be appreciated from review of the following detailed description of the invention, along with the accompanying figures in which like reference numerals refer to like parts throughout. BRIEF DESCRIPTION OF THE DRAWINGS [0009] FIG. 1 is a plan view of a contact lens constructed according to one embodiment of the present invention; [0010] FIG. 2 is a sectional view taken along cutting plane 2-2 of FIG. 1; [0011] FIG. 3 is a plan view of a contact lens constructed according to a second embodiment of the present invention; [0012] FIG. 4 is a plan view of a contact lens constructed according to yet another embodiment of the present invention; [0013] FIG. 5 is a sectional view taken along cutting plane 5-5 of FIG. 4; [0014] FIG. 6A is a plan view of a contact lens constructed according to yet another embodiment of the present invention; [0015] FIG. 6B is a plan view of a contact lens constructed according to a further embodiment of the present invention; and [0016] FIG. 7 is a magnified view of a section of a contact lens constructed to another embodiment of the present invention. [0017] It will be recognized that some or all of the Figures are schematic representations for purposes of illustration and do not necessarily depict the actual relative sizes or locations of the elements shown. The Figures are provided for the purpose of illustrating one or more embodiments of the invention with the explicit understanding that they will not be used to limit the scope or the meaning of the claims. DETAILED DESCRIPTION OF THE INVENTION [0018] In the following paragraphs, the present invention will be described in detail by way of example with reference to the attached drawings. Throughout this description, the preferred embodiment and examples shown should be considered as exemplars, rather than as limitations on the present invention. As used herein, the "present invention" refers to any one of the embodiments of the invention described herein, and any equivalents. Furthermore, reference to various feature(s) of the "present invention" throughout this document does not mean that all claimed embodiments or methods must include the referenced feature(s). [0019] The present invention relates to contact lenses, and includes both homogenous lenses, and hybrid hard-soft contact lenses. In one embodiment of the present invention, a contact lens includes areas, or regions of unequal size that are thinner than adjacent regions of the contact lens. One feature of this embodiment is that the contact lens provides rotational stability and therefore maintains a correct rotational position on a wearer's eye. Continue reading about Contact lens... Full patent description for Contact lens Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Contact lens patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Contact lens or other areas of interest. ### Previous Patent Application: Method and device for measuring retinal stray light Next Patent Application: Digital projector with timer Industry Class: Optics: eye examining, vision testing and correcting ### FreshPatents.com Support Thank you for viewing the Contact lens patent info. IP-related news and info Results in 0.38076 seconds Other interesting Feshpatents.com categories: Novartis , Pfizer , Philips , Polaroid , Procter & Gamble , 174 |
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