Disposable ophthalmic lens

• US 20050157257A1
• Filed: 11/22/2004
• Published: 07/21/2005
• Est. Priority Date: 11/16/2001
• Status: Active Grant

• Current Assignee: Katena Products, Inc. (Corza Medical Inc.)
• Original Assignee: Gregory L. Heacock
• Inventors: Heacock, Gregory L.
• Granted Patent: US 7,281,794 B2
• Time in Patent Office: Days
• US Class Current: 351/161
• CPC Class Codes: A61B 3/125 with contact lenses contact lenses per se G02C7/04

Abstract

An ophthalmic lens with high definition, wide field of view and high magnification has, in one embodiment, a contact lens, an intermediate field lens and an image lens wherein a real image is formed inside the field lens. At least two of the lenses contribute to the magnification and three surfaces of the ophthalmic lens are aspheric to provide a better defined image. The ophthalmic lens is made disposable with high quality plastic lenses and a plastic holder. A portion of the holder changes appearance in response to change in environment to indicate that the disposable lens has been used.

Claims

1-44. -44. (canceled)

45. A disposable ophthalmic lens used in contact with an eye comprising:

a disposable holder supporting one or more lenses when the ophthalmic lens is in use;

a sterile disposable contact lens formed of a transparent plastic mounted in the holder, the contact lens having a first surface shaped to contact an eye when in use and a second surface that is aspheric; and

a package enclosing the holder supporting one or more lenses including the contact lens to maintain the contact lens free from contamination.

46. A disposable ophthalmic lens as recited in claim 45 wherein said contact lens is formed of polymethylmethacrylate.

47. A disposable ophthalmic lens as recited in claim 45 wherein the holder is acrylic.

48. A disposable ophthalmic lens as recited in claim 45 wherein the holder is styrene.

49. A disposable ophthalmic lens as recited in claim 45 wherein the holder is polycarbonate.

50. A disposable ophthalmic lens as recited in claim 45 wherein at least a portion of the holder is photoreactive so as to change color when exposed to light and the package is non-light transmissive.

51. A disposable ophthalmic lens as recited in claim 45 wherein the contact lens is mounted in a first end of the holder, a second lens is mounted in an end of the holder opposite the first lens and a third lens is disposed between the first and second lens.

52. A disposable ophthalmic lens as recited in claim 51 wherein the second and third lenses are formed of a transparent plastic.

53. A disposable ophthalmic lens as recited in claim 52 wherein the contact lens, second lens and third lens are formed of polymethylmethacrylate.

54. A disposable ophthalmic lens as recited in claim 51 wherein a real image is formed in the second lens.

55. A disposable ophthalmic lens as recited in claim 51 wherein the contact lens has an aspheric surface opposite the contact surface and the second lens has a first and second surface both of which are aspheric.

56. A disposable ophthalmic lens as recited in claim 51 wherein each of the second and third lenses contributes to the optical power of the ophthalmic lens.

57. A disposable ophthalmic lens as recited in claim 51 wherein the ophthalmic lens has a field of view that is greater than or equal to 60°

.

58. An ophthalmic lens used in contact with an eye comprising:

a holder supporting a plurality of lenses;

a contact lens mounted in a first end of the holder, the contact lens having a first surface shaped to contact an eye when in use and a second surface that is aspheric;

an intermediate lens mounted in the holder and spaced between the contact lens and an image lens, the intermediate lens bending peripheral rays from the contact lens towards the image lens and contributing optical power; and

an image lens mounted in a second end of the holder with a positive first surface through which rays from the intermediate lens enter and are focused to form a real image inside the lens and a second surface that magnifies the real image.

59. An ophthalmic lens as recited in claim 58 wherein the aspheric surface of the contact lens neutralizes the optical power of the cornea.

60. An ophthalmic lens as recited in claim 58 wherein the filed of view of the ophthalmic lens is greater than or equal to 60°

.

61. An ophthalmic lens as recited in claim 58 wherein the contact lens, intermediate lens and image lens each have a thickness less than 14 mm.

62. An ophthalmic lens as recited in claim 58 wherein the contact lens, intermediate lens and image lens each have a thickness less than or approximately equal to 13 mm.

63. An ophthalmic lens as recited in claim 58 wherein the first and second surfaces of the image lens are aspheric surfaces.

70. An ophthalmic lens as recited in claim 58 wherein each of the lenses is formed of a plastic material and the holder is formed of a plastic material.

64-69. -69. (canceled)

71. An ophthalmic lens used in contact with an eye comprising:

a holder supporting a plurality of lenses;

a contact lens mounted in a first end of the holder, the contact lens having a first surface shaped to contact an eye when in use and a second surface that is aspheric;

an image lens mounted in a second end of the holder with a positive first surface through which rays enter and are focused to form a real image inside the lens and a second surface that magnifies the real image, the first and second surfaces of the image lens being aspheric; and

an intermediate lens mounted in the holder and spaced between the contact lens and image lens to contribute optical power to the ophthalmic lens and wherein the aspheric surfaces of the contact lens and image lens are defined by

$Z=\frac{{\mathrm{Cr}}^2}{1+\sqrt{1-\left(1+k\right)<br><br>C^2<br><br>r^2}}+A_1<br><br>r^2+A_2<br><br>r^4+A_3<br><br>r^6.$