US4309085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for measuring eye features with a contact lens
Assignee: Individual
•
Filing: 1979-07-12
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Granted: 1982-01-05
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Expires: 1999-07-12
Abstract
Abstract The disclosure is of a contact lens for use on the eye, the lens carrying indicia usable for measuring changes in the shape, size or length, or the like, of portions of the eye.
Inventors
- 👤 Robert J. Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:19
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/1005; G; G02; G02C; G02C7/00; G02C7/02; G02C7/021; G02C7/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
64 words
The method of measuring features of the eye comprising forming a soft contact lens having measuring indicia thereon, repeatedly placing said soft contact lens on the eye and in intimate engagement therewith, said lens overlying a changeable feature of the eye to be measured, and measuring said feature by means of said indicia each time the soft contact lens is placed on the eye.
Claim 2
Independent Claim
64 words
The method of measuring features of the eye comprising forming a soft contact lens having measuring indicia thereon, repeatedly placing said soft contact lens on the eye and in intimate engagement therewith, said lens overlying a changeable feature of the eye to be measured, and measuring said feature by means of said indicia each time the soft contact lens is placed on the eye.
Claim 3
Independent Claim
124 words
The method of measuring phenonema in the eye comprising the steps of forming a soft contact lens having measuring indicia thereon, at a predetermined time, placing said lens on the eye overlying a feature of the eye to be measured whereby said feature occupies a portion of said measuring indicia, said lens intimately engaging the surface of the eye over its entire area, measuring said feature by means of said indicia, removing said contact lens from the eye, and at a later time, again placing said contact lens on the eye and measuring said feature and comparing the relationship of said feature to said measuring indicia, whereby the operator can determine the medical status of the feature and its change in dimensions with time.
Claim 4
Independent Claim
124 words
The method of measuring phenonema in the eye comprising the steps of forming a soft contact lens having measuring indicia thereon, at a predetermined time, placing said lens on the eye overlying a feature of the eye to be measured whereby said feature occupies a portion of said measuring indicia, said lens intimately engaging the surface of the eye over its entire area, measuring said feature by means of said indicia, removing said contact lens from the eye, and at a later time, again placing said contact lens on the eye and measuring said feature and comparing the relationship of said feature to said measuring indicia, whereby the operator can determine the medical status of the feature and its change in dimensions with time.
Claim 5
Dependent Claim
37 words
The method defined in claim 2 and repeating the steps of inserting the contact lens and measuring the feature in the eye at spaced time intervals to follow the medical condition of said feature in the eye.
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) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |