Patent US2776307A successfully refreshed from Google Patents.
Patent US4997437A successfully refreshed from Google Patents.
US4997437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the surgical correction of ametropia of one or both eyes of living beings
Assignee: Individual
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Filing: 1989-04-17
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Granted: 1991-03-05
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Expires: 2009-04-17
Abstract
Abstract A process and an apparatus for the surgical correction of ametropia, which can occur as a function of the corneal curvature in the optical system of one or both eyes of living beings, are proposed. The apparatus includes a grinder essentially comprising a base member to be fixed to the eye and a rotary-driven grinding or polishing punch. A displacement of the focal point in the retinal plane is achieved and consequently the ratio of the optical axis to the refractive force of the eye is corrected by grinding and/or polishing the cornea surface in the optical curvature region.
Inventors
- 👤 Hans R. Grieshaber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:36
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/013; A61B; A61B17/00; A61B17/32; A61B2017/320004
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
181 words
Apparatus for the surgical correction of ametropia, particularly in the optical system of one or both eyes of living being, dependent on a corneal curvature by grinding the cornea and polishing the cornea in its optical curvature region, the apparatus comprising a singe-piece base member detachably fixable to the eye, and a grinder insertable in the base member, said grinder including a casing, a drive member positioned in said casing and a grinding punch rotary-driven by said drive member and including a punch disk provided on a side thereof facing a cornea surface (OF) of the eye with a concave grinding surface having a radius of curvature (r), said base member including a first recess, a second recess and a third recess extending in an axial direction, said first recess having a peripheral wall used for a self-centering reception of said casing of the grinder and defining with said second recess an annular surface on which said casing rests, said second recess receiving therethrough the grinding punch and said third recess circularly embracing and fixing said base member to the eye.
Claim 2
Dependent Claim
181 words
Apparatus for the surgical correction of ametropia, particularly in the optical system of one or both eyes of living being, dependent on a corneal curvature by grinding the cornea and polishing the cornea in its optical curvature region, the apparatus comprising a singe-piece base member detachably fixable to the eye, and a grinder insertable in the base member, said grinder including a casing, a drive member positioned in said casing and a grinding punch rotary-driven by said drive member and including a punch disk provided on a side thereof facing a cornea surface (OF) of the eye with a concave grinding surface having a radius of curvature (r), said base member including a first recess, a second recess and a third recess extending in an axial direction, said first recess having a peripheral wall used for a self-centering reception of said casing of the grinder and defining with said second recess an annular surface on which said casing rests, said second recess receiving therethrough the grinding punch and said third recess circularly embracing and fixing said base member to the eye.
Claim 3
Dependent Claim
65 words
Apparatus according to claim 1, wherein the first recess has a cylindrical side wall which forms a reference (R2) in a radial direction with respect to a center line (Z) of the optical system, and a circular support surface which forms a reference (R1) with respect to the cornea surface (OF) of the eye to enable the grinder to be inserted into the base member.
Claim 4
Dependent Claim
39 words
Apparatus according to claim 1, wherein the third recess for the embracing and fixing of the base member to the eye is formed as a vacuum space, which is connected to a suction connection provided on the base member.
Claim 5
Dependent Claim
17 words
Apparatus according to claim 1, wherein the base member is made from a readily sterilziable, transparent material.
Claim 6
Dependent Claim
12 words
Apparatus according to claim 4, wherein said transparent material is polysulphone (PSU).
Claim 7
Dependent Claim
26 words
Apparatus according to claim 1, wherein said grinder includes a micrometer screw adjustable in a micrometer range for an exact feed movement of the grinding punch.
Claim 8
Dependent Claim
43 words
Apparatus according to claim 1, wherein the grinding punch operatively connected to the drive member is interchangeably arranged in the grinder, and wherein a plurality of grinding punches can be provided with correspondingly constructed grinding surfaces, depending on the ametropia to be corrected.
Claim 9
Dependent Claim
40 words
Apparatus according to claim 7, wherein the plurality of interchangeable grinding punches are provided with different grinding surfaces graded with the radius of curvature (r) between approximately 5 and 15 mm, the radius of curvature steps being approximately 1/10 mm.
Claim 10
Dependent Claim
21 words
Apparatus according to claim 1, wherein the grinding surface of the punch disk is provided with a fine-grain, crystalline surface structure.
Claim 11
Dependent Claim
18 words
Apparatus according to claim 9, wherein the grinding surface of the punch disk is provided with diamond dust.
Claim 12
Dependent Claim
19 words
Apparatus according to claim 1, wherein the punch disk is interchangeably fixed to a shaft of the grinding punch.
Claim 13
Dependent Claim
29 words
Apparatus according to claim 1, wherein the grinder is made from light metal and the drive member for the grinding punch is formed by a high speed air turbine.
Claim 14
Dependent Claim
14 words
Apparatus according to claim 1, wherein said drive member is a direct current motor.
Claim 15
Dependent Claim
13 words
Apparatus according to claim 1, wherein said drive member is a stepping motor.
Claim 16
Dependent Claim
29 words
Apparatus according to claim 1, wherein the drive member for the grinding punch is an external drive and the grinder is arranged on a beam of a stand-like post.
Claim 17
Dependent Claim
26 words
Apparatus according to claim 15, wherein the beam, together with the grinder and the rotary-driven grinding punch can be axially fed to the cornea surface (OF).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-04 | 1994-09-03 | 1995-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-04 | 1998-09-03 | 1999-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-04 | 2002-09-03 | 2003-03-05 | $7700.00 | Window Closed / Lapsed |