Patent FR2697697A1 successfully refreshed from Google Patents.
Patent US6474814B1 successfully refreshed from Google Patents.
US6474814B1
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US
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Multifocal ophthalmic lens with induced aperture
Assignee: VISIONEERING TECHNOLOGIES Inc
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Filing: 2000-09-08
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Granted: 2002-11-05
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Expires: 2020-09-08
Abstract
Abstract Multifocal lenses are defined by nonconical aspheric optical surfaces. Various alternative surface shapes provide a central distance vision region surrounded by an optical step. The optical step has rapidly increasing power in the radial direction which creates an induced aperture through which the cortical elements of the vision system are induced to concentrate. The induced aperture results in increased clarity in distance vision. Nonconical aspheric optical surfaces are defined to produce the desired optical power distributions. These surface functions are also provided in form of polynomial series for simplicity of use in computer driven lathes for shaping contact lenses. The invention includes contact lenses, scleral lenses, intraocular lenses, and lenses impressed or surgically shaped within the corneal tissue as well as methods of designing and fitting these lenses.
Inventors
- 👤 Richard A. Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:33
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2/1616; A61F2/1618; A61F2/1637; A61F2/164; G; G02; G02C; G02C7/00; G02C7/02; G02C7/024; G02C7/028; G02C7/04; G02C7/041; G02C7/042; G02C7/044; G02C7/06; G02C7/061; G02C7/063; A61F2250/00; A61F2250/0014; A61F2250/0036
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
146 words
An ophthalmic lens comprising: an optical surface of revolution about an apex having an apical distance power, the apex also having an apical radius of curvature, the surface defined by: Z ( x )=(2 ·k ·(ln P ) 2 ) −1 ·P k·x +(2 ·k ·(ln P ) 2 ) −1 ·P −k·x +( k ·(ln P ) 2 ) −1 wherein: x is a perpendicular distance from the apex in millimeters, Z(x) defines a sagittal depth at point x, k is the inverse of the apical radius of curvature in millimeters, P is an exponential power base, ln is the natural logarithm function; and the optical surface forming: a distance vision region surrounding the apex; an optical step surrounding the distance vision region; lens optical power increasing smoothly radially in the distance vision region and optical step to a maximum power in the optical step.
Claim 2
Dependent Claim
146 words
An ophthalmic lens comprising: an optical surface of revolution about an apex having an apical distance power, the apex also having an apical radius of curvature, the surface defined by: Z ( x )=(2 ·k ·(ln P ) 2 ) −1 ·P k·x +(2 ·k ·(ln P ) 2 ) −1 ·P −k·x +( k ·(ln P ) 2 ) −1 wherein: x is a perpendicular distance from the apex in millimeters, Z(x) defines a sagittal depth at point x, k is the inverse of the apical radius of curvature in millimeters, P is an exponential power base, ln is the natural logarithm function; and the optical surface forming: a distance vision region surrounding the apex; an optical step surrounding the distance vision region; lens optical power increasing smoothly radially in the distance vision region and optical step to a maximum power in the optical step.
Claim 3
Dependent Claim
19 words
The lens according to claim 1 , wherein: P has a value in the range of 1 to 60.
Claim 4
Dependent Claim
39 words
A lens according to claim 2 , further comprising: a reduced power region surrounding the optical step and having optical power decreasing rapidly from the maximum power radially outward to a reduced power no greater than the distance power.
Claim 5
Dependent Claim
18 words
The lens according to claim 3 , further comprising: a scotopic vision region surrounding the reduced power region.
Claim 6
Dependent Claim
26 words
The lens according to claim 4 , wherein: the distance power is negative and the scotopic region has a power more negative than the distance power.
Claim 7
Dependent Claim
18 words
The lens according to claim 4 , wherein: the scotopic region has a power equal the distance power.
Claim 8
Dependent Claim
14 words
The lens according to claim 1 , wherein: the lens is a intraocular lens.
Claim 9
Dependent Claim
91 words
An ophthalmic lens comprising: a centrally located distance vision region having an apex; an optical step surrounding the distance vision region; and at least one optical surface creating a lens power distribution that increases smoothly radially outward from an apical power at the apex to a maximum distribution power greater than the apical power, and the power distribution increasing sufficiently rapidly in the optical step to the maximum distribution power to induce a user receiving distant images passing through the lens to view the distant images through the distance vision region.
Claim 10
Dependent Claim
91 words
An ophthalmic lens comprising: a centrally located distance vision region having an apex; an optical step surrounding the distance vision region; and at least one optical surface creating a lens power distribution that increases smoothly radially outward from an apical power at the apex to a maximum distribution power greater than the apical power, and the power distribution increasing sufficiently rapidly in the optical step to the maximum distribution power to induce a user receiving distant images passing through the lens to view the distant images through the distance vision region.
Claim 11
Dependent Claim
32 words
A lens according to claim 8 , wherein: the power distribution includes a power value equal a predetermined near vision power at a radial dimension less than a predetermined mesopic pupillary dimension.
Claim 12
Dependent Claim
28 words
A lens according to claim 9 , further comprising: a near vision region extending radially outward from the optical step and having power equal the near vision power.
Claim 13
Dependent Claim
29 words
A lens according to claim 10 , further comprising: a scotopic vision region surrounding the near vision region and having a scotopic power no greater than the apical power.
Claim 14
Dependent Claim
17 words
A lens according to claim 11 , wherein: the scotopic power is less than the apical power.
Claim 15
Dependent Claim
191 words
A lens according to claim 8 , wherein: the at least one optical surface is an optical surface defined by the summation: Z ( x ) = ∑ n = 1 m k 2 n - 1 ( ln P ) 2 ( n - 1 ) ( 2 · n ) ! · x 2 n where : x is a perpendicular distance from the apex in millimeters , Z ( x ) defines a sagittal depth at point x , k is the inverse of the apical radius of curvature in millimeters , P is a power base , ln is the natural logarithm function . m equals at least 3.
Claim 16
Dependent Claim
19 words
A lens according to claim 13 , wherein: P has a value in the range of 1 to 60.
Claim 17
Dependent Claim
257 words
A lens according to claim 8 , wherein: the at least one optical surface is an optical surface defined by Z ( x ) = k x 2 2 · [ 1 - ( 1 - S · k 2 · x 2 ) 1 / 2 ] · [ 1 + ( 1 - S · k 2 · x 2 ) 1 / 2 ] - 1 + ( 2 · k · ( ln P ) 2 ) - 1 · P k · x + ( 2 · k · ( ln P ) 2 ) - 1 · P k · x - ( k · ( ln P ) 2 ) - 1 wherein: x is a perpendicular distance from the apex in millimeters Z ( x ) defines a sagittal depth at point x , k is the inverse of the apical radius of curvature in millimeters , P is a power base , ln is the natural logarithm function , and S is a shape factor .
Claim 18
Dependent Claim
19 words
A lens according to claim 15 , wherein: P has a value in the range of 1 to 60.
Claim 19
Dependent Claim
19 words
A lens according to claim 16 , wherein: S has a value in the range of −5 to 2.
Claim 20
Dependent Claim
25 words
A lens according to claim 8 , wherein: the power distribution from the apical power to the maximum power is defined by a cyclic function.
Claim 21
Dependent Claim
187 words
A lens according to claim 18 , wherein the cyclic function is: ADD ( x ) = ADDM 2 · [ 1 + cosine [ π · ( X c - x X c ) ] ] where: ADD ( x ) is the add power above the apical power at x , x is a perpendicular distance from the apex , ADDM is equal the maximum power , X c is a predetermined location of the maximum power , and π is the trigonometric value pi equal the ratio of a circle ' s circumference to diameter .
Claim 22
Independent Claim
98 words
A method of correcting human sight comprising: forming at least one optical surface in eye tissue, the surface creating a lens power distribution having an apex and a distance vision region surrounding the apex, and the power distribution changing smoothly and without optical discontinuity outward from an apical power at the apex to a maximum distribution power greater than the apical power, and the power distribution having an optical step in which the power increases sufficiently rapidly to induce a user receiving distant images passing through the lens to perceive the distant images through the distance vision region.
Claim 23
Independent Claim
98 words
A method of correcting human sight comprising: forming at least one optical surface in eye tissue, the surface creating a lens power distribution having an apex and a distance vision region surrounding the apex, and the power distribution changing smoothly and without optical discontinuity outward from an apical power at the apex to a maximum distribution power greater than the apical power, and the power distribution having an optical step in which the power increases sufficiently rapidly to induce a user receiving distant images passing through the lens to perceive the distant images through the distance vision region.
Claim 24
Dependent Claim
80 words
An ophthalmic lens comprising: a lens surface creating a lens power distribution having an apex and a distance vision region surrounding the apex, and the power distribution changing smoothly, and without optical discontinuity, outward from an apical power at the apex to a maximum distribution power greater than the apical power, and the power distribution having an optical step for inducing a user receiving distant images passing through the lens to perceive the distant images through the distance vision region.
Claim 25
Dependent Claim
80 words
An ophthalmic lens comprising: a lens surface creating a lens power distribution having an apex and a distance vision region surrounding the apex, and the power distribution changing smoothly, and without optical discontinuity, outward from an apical power at the apex to a maximum distribution power greater than the apical power, and the power distribution having an optical step for inducing a user receiving distant images passing through the lens to perceive the distant images through the distance vision region.
Claim 26
Dependent Claim
184 words
An ophthalmic lens according to claim 21 , wherein: the lens surface is defined by the summation: Z ( x ) = ∑ n = 1 m k 2 n - 1 ( ln P ) 2 ( n - 1 ) ( 2 · n ) ! · x 2 n wherein: x is a perpendicular distance from the apex in millimeters , Z ( x ) defines a sagittal depth at point x , k is the inverse of the apical radius of curvature in millimeters , P is a power base , ln is the natural logarithm function . m equals at least 3.
Claim 27
Dependent Claim
18 words
A lens according to claim 22 wherein: P has a value in the range of 1 to 60.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-11-04 | 2006-05-06 | 2006-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-11-04 | 2010-05-06 | 2010-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-11-04 | 2014-05-06 | 2014-11-05 | $7700.00 | Window Closed / Lapsed |