Patent US5414478A successfully refreshed from Google Patents.
US5414478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for determining contact lenses
Assignee: Individual
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Filing: 1993-09-22
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Granted: 1995-05-09
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Expires: 2013-09-22
Abstract
Abstract Apparatus and method for determining a prescription for contact lenses, comprising in cooperative combination a refractometer and a keratometer, both hooked up to a computer, comprising a program for processing the results obtained from said meters in any desired sequence, optionally supplemented with personal data and the results of a tono-meter and/or vertexmeter in optional sequence. The apparatus and method are also suitable for detecting any requirement for readjustment of the lenses after a period of time of use, comparing the new data with the data stored in the memory of the computer, and providing any readjustment required.
Inventors
- 👤 Herman van Gelderen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:07
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/103; A61B3/107; A61B3/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
80 words
An apparatus for prescribing contact lenses, comprising: a refractometer for taking a first measurement of a patient's eye and producing a first output signal representative thereof; a keratometer for taking a second measurement of the patient's eye and producing a second output signal representative thereof; means for inputting personal data of the patient relevant to prescription of contact lenses; and processing means for processing said first output signal, said second output signal, and said personal data to prescribe contact lenses.
Claim 2
Independent Claim
80 words
An apparatus for prescribing contact lenses, comprising: a refractometer for taking a first measurement of a patient's eye and producing a first output signal representative thereof; a keratometer for taking a second measurement of the patient's eye and producing a second output signal representative thereof; means for inputting personal data of the patient relevant to prescription of contact lenses; and processing means for processing said first output signal, said second output signal, and said personal data to prescribe contact lenses.
Claim 3
Dependent Claim
41 words
An apparatus for prescribing contact lenses as claimed in claim 1, further comprising a tono-meter for taking a third measurement of the patient's eye and producing a third output signal representative thereof, wherein said processing means processes said third output signal.
Claim 4
Dependent Claim
41 words
An apparatus for prescribing contact lenses as claimed in claim 2, further comprising a vertexmeter for taking a fourth measurement of the patient's eye and producing a fourth output signal representative thereof, wherein said processing means processes said fourth output signal.
Claim 5
Dependent Claim
41 words
An apparatus for prescribing contact lenses as claimed in claim 1, further comprising a vertexmeter for taking a third measurement of the patient's eye and producing a third output signal representative thereof, wherein said processing means processes said third output signal.
Claim 6
Independent Claim
85 words
A method for prescribing contact lenses using an apparatus comprising a refractometer, a keratometer, and an input device operatively connected to a processing device, comprising the steps of: performing a first measurement of a patient's eye using the refractometer; performing a second measurement of the patient's eye using the keratometer; inputting personal data of the patient relevant to prescription of contact lenses; and processing the first measurement, the second measurement, and the personal data with the processing device to determine a prescription for contact lenses.
Claim 7
Independent Claim
85 words
A method for prescribing contact lenses using an apparatus comprising a refractometer, a keratometer, and an input device operatively connected to a processing device, comprising the steps of: performing a first measurement of a patient's eye using the refractometer; performing a second measurement of the patient's eye using the keratometer; inputting personal data of the patient relevant to prescription of contact lenses; and processing the first measurement, the second measurement, and the personal data with the processing device to determine a prescription for contact lenses.
Claim 8
Dependent Claim
27 words
A method for prescribing contact lenses as claimed in claim 5, further comprising the step of performing a third measurement of the patient's eye using a tono-meter.
Claim 9
Dependent Claim
27 words
A method for prescribing contact lenses as claimed in claim 6, further comprising the step of performing a fourth measurement of the patient's eye using a vertexmeter.
Claim 10
Dependent Claim
27 words
A method for prescribing contact lenses as claimed in claim 5, further comprising the step of performing a third measurement of the patient's eye using a vertexmeter.
Claim 11
Dependent Claim
22 words
A method for prescribing contact lenses as claimed in claim 5, wherein said personal data includes information concerning the patient's medical history.
Claim 12
Dependent Claim
22 words
A method for prescribing contact lenses as claimed in claim 5, wherein said personal data includes information concerning the patient's work environment.
References Cited (Backward Citations)
US3290927A
Cited
US4796989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-08 | 1998-11-07 | 1999-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-08 | 2002-11-07 | 2003-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-08 | 2006-11-07 | 2007-05-09 | $7700.00 | Window Closed / Lapsed |