Patent US3589800A successfully refreshed from Google Patents.
US3589800A
Expired / Lapsed
US
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Gonioscopic lens
Assignee: Individual
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Filing: 1969-06-05
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Granted: 1971-06-29
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Expires: 1989-06-05
Abstract
Abstract A gonioscope for viewing the angle of the anterior chamber of an eye comprises a lens having a concave surface closely matching the surface of the cornea of the eye and adapted to be positioned in engagement with the cornea in use with the axis of the concave surface substantially coincident with the axis of the eye and a convex spherical lens surface having an axis that intersects the axis of the concave surface at an angle of substantially 55*. Associated with the lens is a light-conducting fiber cable that is joined to the spherical lens surface at a point spaced from the axis of the convex surface, the light-conducting fiber cable being oriented and positioned so as to direct light toward a place in the angle radially inward of the zone of the angle being observed.
Inventors
- 👤 Hernando Cardona
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:44
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/117
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
229 words
A gonioscope for viewing the angle of the anterior chamber of an eye comprising a lens having a concave surface closely matching the external surface of the cornea of the eye and adapted to be engaged with the cornea in use with the axis of the concave surface substantially coincident with the axis of the eye when in use and a convex spherical lens surface having an axis that intersects the axis of the concave surface at an angle of substantially 55*, the concave and convex surfaces being closely spaced at points thereon in the plane defined by the axes thereof; and a rod-type light conductor joined to the convex spherical surface, said conductor being joined to the convex surface at a location thereon spaced from the axis thereof and in a quadrant thereof defined by (1) said plane of the axes of the concave and convex surfaces and (2) a second plane perpendicular to said plane and including the said axis of the convex surface and said quadrant being one of the two quadrants adjacent the said closely spaced points, that portion of the light conductor which is adjacent to the point of its attachment to the convex spherical surface being aligned to direct a light beam centered at a place in the chamber spaced from the portion of the angle being observed, thereby to reduce reflection effects.
Claim 2
Dependent Claim
229 words
A gonioscope for viewing the angle of the anterior chamber of an eye comprising a lens having a concave surface closely matching the external surface of the cornea of the eye and adapted to be engaged with the cornea in use with the axis of the concave surface substantially coincident with the axis of the eye when in use and a convex spherical lens surface having an axis that intersects the axis of the concave surface at an angle of substantially 55*, the concave and convex surfaces being closely spaced at points thereon in the plane defined by the axes thereof; and a rod-type light conductor joined to the convex spherical surface, said conductor being joined to the convex surface at a location thereon spaced from the axis thereof and in a quadrant thereof defined by (1) said plane of the axes of the concave and convex surfaces and (2) a second plane perpendicular to said plane and including the said axis of the convex surface and said quadrant being one of the two quadrants adjacent the said closely spaced points, that portion of the light conductor which is adjacent to the point of its attachment to the convex spherical surface being aligned to direct a light beam centered at a place in the chamber spaced from the portion of the angle being observed, thereby to reduce reflection effects.
Claim 3
Dependent Claim
28 words
A gonioscope according to claim 1 wherein the concave surface of the lens is spherical and has a radius of from about 8.20 mm. to about 8.50 mm.
Claim 4
Dependent Claim
21 words
A gonioscope according to claim 1 wherein the spherical convex surface of the lens has a radius of about 12.5 mm.
Claim 5
Dependent Claim
79 words
A gonioscope according to claim 1 wherein the portion of the light conductor immediately adjacent the point of attachment to the lens is aligned to direct a light beam into the lens along a line lying in the plane (1) perpendicular to the plane of the axes of the concave and convex surfaces of the lens and (2) spaced from the axis of the spherical surface, such line forming an acute angle with the said plane of the axes.
Claim 6
Dependent Claim
25 words
A gonioscope according to claim 4 wherein the plane Of the light beam is spaced about 6 mm. from the axis of the spherical lens.
Claim 7
Dependent Claim
13 words
A gonioscope according to claim 5 wherein the acute angle is about 17*.
Claim 8
Dependent Claim
31 words
A gonioscope according to claim 5 wherein the plane of the beam is spaced about 6 mm. from the axis of the spherical lens, and the acute angle is about 17*.
Claim 9
Dependent Claim
31 words
A gonioscope according to claim 1 wherein substantially all of the surfaces of the lens other than the said concave and convex spherical lens surfaces are coated with an antireflective material.
Claim 10
Dependent Claim
16 words
A gonioscope according to claim 1 wherein the light-conducting cable is coated with an antireflective material.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |