US5374272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for mechanically dilating the pupil of an eye
Assignee: ARPA PAOLO
•
Filing: 1993-06-29
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Granted: 1994-12-20
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Expires: 2013-06-29
Abstract
Abstract A pupillary dilation and protection device is disclosed comprising an elastomeric ring made from biocompatible material having a groove formed therein for receiving and protecting the pupillary rim and iris, whereby, when the ring is inserted into the pupil of an eye of a patient, it mechanically dilates the pupil.
Inventors
- 👤 Paolo Arpa
- 👤 Gholam A. Peyman
- 👤 Stephen A. Updegraff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:28
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61B; A61B17/00; A61B17/02; A61B17/0231
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
80 words
A pupillary dilation and protection device comprising: a biocompatible elastic ring having a radially outwardly extending annular inferior flange, a radially outwardly extending annular superior flange and an interconnecting annular inner wall forming a generally C-shaped annular groove; said inferior flange having a radial dimension larger than said superior flange to aid in engaging and protecting the pupillary rim; whereby when said ring is inserted into the pupil of an eye, said groove engages and mechanically dilates the pupillary rim.
Claim 2
Dependent Claim
80 words
A pupillary dilation and protection device comprising: a biocompatible elastic ring having a radially outwardly extending annular inferior flange, a radially outwardly extending annular superior flange and an interconnecting annular inner wall forming a generally C-shaped annular groove; said inferior flange having a radial dimension larger than said superior flange to aid in engaging and protecting the pupillary rim; whereby when said ring is inserted into the pupil of an eye, said groove engages and mechanically dilates the pupillary rim.
Claim 3
Dependent Claim
20 words
The pupillary dilation and protection device of claim 1 wherein said biocompatible elastic ring is made from an organosilicone polymer.
Claim 4
Dependent Claim
25 words
The pupillary dilation device of claim 1 further comprising a plurality of slits formed along the perimeters of said superior flange and said inferior flange.
Claim 5
Dependent Claim
25 words
The pupillary dilation and protection device of claim 1 wherein the inner diameter of said ring is from about 5 mm to about 9 mm.
Claim 6
Dependent Claim
25 words
The pupillary dilation and protection device of claim 1 wherein the outer diameter of said ring is from about 6 mm to about 10 mm.
Claim 7
Dependent Claim
25 words
The pupillary dilation and protection device of claim 1 wherein said inferior flange has a radial dimension from about 0.5 mm to about 4.0 mm.
Claim 8
Dependent Claim
25 words
The pupillary dilation and protection device of claim 1 wherein said superior flange has a radial dimension from about 0.5 mm to about 2.0 mm.
Claim 9
Dependent Claim
23 words
The pupillary dilation and protection device of claim 1 wherein said ring has a width from about 0.5 mm to about 1.0 mm.
Claim 10
Dependent Claim
26 words
The pupillary dilation and protection device of claim 1 wherein said annular C-shaped groove has an internal diameter of about 0.1 mm to about 0.3 mm.
Claim 11
Independent Claim
129 words
A method of mechanically dilating the pupil of an eye comprising: providing a biocompatible elastic ring having an undeformed shape and a radially outwardly extending annular inferior flange, a radially outwardly extending annular superior flange having a smaller radial dimension than the radial dimension of said inferior flange and an interconnecting annular inner wall defining a circumferential groove adapted to receive the pupillary rim of an eye; making an incision in the corneal or scleral pocket of the eye; compressing said ring; inserting said compressed ring through the incision; placing said compressed ring into the pupil of the eye; engaging the pupillary rim with said groove; releasing said compressed ring and permitting said ring to resume its undeformed shape thereby mechanically dilating the pupil and protecting said pupillary rim.
Claim 12
Independent Claim
129 words
A method of mechanically dilating the pupil of an eye comprising: providing a biocompatible elastic ring having an undeformed shape and a radially outwardly extending annular inferior flange, a radially outwardly extending annular superior flange having a smaller radial dimension than the radial dimension of said inferior flange and an interconnecting annular inner wall defining a circumferential groove adapted to receive the pupillary rim of an eye; making an incision in the corneal or scleral pocket of the eye; compressing said ring; inserting said compressed ring through the incision; placing said compressed ring into the pupil of the eye; engaging the pupillary rim with said groove; releasing said compressed ring and permitting said ring to resume its undeformed shape thereby mechanically dilating the pupil and protecting said pupillary rim.
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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) | 1997-12-19 | 1998-06-20 | 1998-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-19 | 2002-06-20 | 2002-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-19 | 2006-06-20 | 2006-12-20 | $7700.00 | Window Closed / Lapsed |