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US 8,944,593 B2Granted
Progressive lenses
OwnerShmuel Urinventor
Life of this patent
Estimating the term…
Abstract
A method comprising: performing eye exam to a subject having a first and second eye; determining a prescription for the first and second eyes, the prescription describing focal power for each of the first eye and the second eye for at least three distances; and providing the prescription to a machine that produces progressive glasses that comprise a first and second lenses, wherein the first and second lenses each having at least three focal portions associated with the at least three distances that are located in a same height in the glasses thereby enabling clear vision for the subject in the first eye and the second eye with respect to the at least three distances.
Claims19
A method comprising:
- having a description of a lens adapted for an eye, wherein the lens comprising a first focal portion associated with a first distance and a second focal portion associated with a second distance, and wherein the lens comprising an intermediate portion having a uniform gradient change in optical power between a first power and a second power associated with the first and second focal portions respectively;
- identifying in the lens, based on a prescription for the eye, an intermediate focal portion associated with an intermediate distance, wherein the intermediate distance is between the first and second distances, wherein the prescription for the eye relates to the first distance, the second distance and the intermediate distance;
- and
- planning, based on a prescription for a counterpart eye and based on the lens, a counterpart lens adapted for the counterpart eye, wherein the prescription comprises focal powers required by the counterpart eye to achieve focus at the first distance, the second distance and the intermediate distance, wherein the counterpart lens comprising a first, a second and an intermediate focal areas, wherein the first, second and intermediate focal areas are located in locations parallel to locations of the first, second and intermediate focal portions, respectively, wherein the counterpart lens comprising a first gradient change in optical power between the first and intermediate focal areas and a second gradient change in optical power between the intermediate and second focal areas, whereby the counterpart lens provides a non-uniform gradient change in optical power between the first focal area and the second focal area, wherein said planning is performed by a processor.
1 more element
A first lens and a second lens,
- wherein each of the first and second lenses comprises:
- a first focal portion associated with a first distance,
- a second focal portion associated with a second distance, and
- an intermediate portion having gradient change in optical power between a first optical power and a second optical power associated with the first and second focal portions respectively;
- wherein the first lens and the second lens are adapted for a first eye and a second eye respectively, based upon focal powers required by the first and second eyes to achieve focus at the first distance, the second distance and at least one intermediate distance in between the first and the second distances;
- wherein the first, second and intermediate focal portions of the first lens are located in locations parallel to locations of the first, second and intermediate focal portions of the second lens, respectively;
- wherein the intermediate portion of the second lens has a non-uniform gradient change in optical power, wherein the intermediate portion of the second lens comprising:
- a first gradient change in optical power between an optical power associated with the first distance and an optical power associated with the at least one intermediate distance;
- and
- a second gradient change in optical power between an optical power associated with the at least one intermediate distance and an optical power associated with the second distance;
- and
- wherein the intermediate portion of the first lens has a uniform gradient change in optical power.
9 more elements
A method comprising:
- performing eye exam to a subject having a first and second eye;
- determining a prescription for the first and second eyes, the prescription describing focal powers for each of the first eye and the second eye for at least three distances;
- and
- providing the prescription to a machine that produces progressive glasses that comprise a first and second lenses, wherein the first and second lenses each having at least three focal portions associated with the at least three distances that are located in a same height in the glasses respectively thereby enabling clear vision for the subject in the first eye and the second eye with respect to the at least three distances, wherein the at least three distances comprises a first distance a second distance and an intermediate distance, wherein the first lens provides a uniform gradient change in optical power between the focal powers of the first eye for the first distance and the second distance, wherein the second lens provides a non-uniform gradient change in optical power between the focal powers of the second eye for the first distance and the second distance.
1 more element
A method comprising:
- obtaining a first prescription for a first eye of a subject, wherein the first prescription comprises optical powers at least at a first distance, a second distance and an intermediate distance;
- obtaining a second prescription for a second eye of the subject, wherein the second prescription comprises optical powers at least at a first distance, a second distance and an intermediate distance;
- planning a first lens for the first eye based on the optical powers at the first distance and at the second distance, wherein the first lens is a progressive lens, wherein the first lens comprising:
- a first portion associated with the first distance,
- a second portion associated with the second distance, and
- an intermediate portion having a uniform gradient change in optical power between the optical power at the first distance and the optical power at the second distance, wherein the intermediate portion is between the first portion and the second portion;
- identifying, in the intermediate portion first lens and based on the first prescription, a location which provides the optical power at the intermediate distance;
- planning a second lens for the second eye based on the second prescription and based on the identified location, wherein the second lens comprising:
- a first portion associated with the first distance, wherein the first portion of the second lens is located in parallel to the first portion of the first lens,
- a second portion associated with the second distance, wherein the second portion of the second lens is located in parallel to the second portion of the first lens, and
- an intermediate portion having a non-uniform gradient change in optical power between the optical power at the first distance and the optical power at the second distance, wherein the intermediate portion is between the first portion and the second portion, wherein the intermediate portion comprising a first sub-portion, an intermediate sub-portion and a second sub-portion, wherein the first sub-portion has a uniform gradient change in optical power between the optical power at the first distance and the optical power at the intermediate distance, wherein the second sub-portion has a uniform gradient change in optical power between the optical power at the intermediate distance and the optical power at the second distance, wherein the intermediate sub-portion having the optical power at the intermediate distance for the second eye, wherein the intermediate sub-portion is between the first sub-portion and the second sub-portion;
- and
- producing the first and second lenses.
10 more elements
Dependencies are inferred from the claim text.