Method and system for adjusting progressive lenses for a patient's spectacles

Claim 1

A method of adjusting a progressive lens relative to the frame of a patient's spectacles, wherein the lens has power and distortions distributions defining far and near vision zones which are located in accordance with respective prescribed first and second values of an optical power required for the patient's eye at distance and reading modes respectively and are spaced from each other by a zone of continuous focus defined in accordance with addition of said lens, the method comprising the steps of: (a) determination of a location of intersection of a line of sight of the patient's eye at said reading mode with a plane defined by the frame of the spectacles relative to said frame; and (b) positioning said progressive lens via at least one of a horizontal translation, a vertical translation, and a rotation of the lens relative to said frame so as to ensure that said location at said reading mode is positioned substantially in said near vision zone, and a line connecting said location with said far vision zone lies substantially within said zone of continuous focus.

Claim 2

A method of adjusting a progressive lens relative to the frame of a patient's spectacles, wherein the lens has power and distortions distributions defining far and near vision zones which are located in accordance with respective prescribed first and second values of an optical power required for the patient's eye at distance and reading modes respectively and are spaced from each other by a zone of continuous focus defined in accordance with addition of said lens, the method comprising the steps of: (a) determination of a location of intersection of a line of sight of the patient's eye at said reading mode with a plane defined by the frame of the spectacles relative to said frame; and (b) positioning said progressive lens via at least one of a horizontal translation, a vertical translation, and a rotation of the lens relative to said frame so as to ensure that said location at said reading mode is positioned substantially in said near vision zone, and a line connecting said location with said far vision zone lies substantially within said zone of continuous focus.

Claim 10

The method according to claims 2 wherein said determination of said power and distortions distributions comprises processing an image of the lens in a so-called `mapping` system.

Claim 15

The method according to claim, 1, wherein said positioning comprises rotation of the lens in said plane defined by the frame of the spectacles.

Claim 16

A method of adjusting a progressive lens relative to the frame of a patient's spectacles, wherein the lens has distributions of an optical power and optical distortions therein defining far and near vision zones which are located in accordance with respective prescribed first and second values of the optical power required for the patient's eye at distance and reading modes, respectively, and are spaced from each other by a zone of continuous focus defined in accordance with addition of said lens, the method comprising the steps of: determination of said distributions of optical power and optical distortions in said progressive lens; determination of a location of intersection of a line of sight of the patient's eye for at least said reading mode with a plane defined by the frame of the spectacles, relative to said frame; and positioning said progressive lens via at least one of a horizontal translation, a vertical translation, and a rotation of the lens relative to said frame so as to ensue that said location is positioned substantially in the near vision zone, and a line connecting said location at the reading mode with said far vision zone lies substantially within said zone of the continuous focus.

Claim 17

A method of adjusting a progressive lens relative to the frame of a patient's spectacles, wherein the lens has distributions of an optical power and optical distortions therein defining far and near vision zones which are located in accordance with respective prescribed first and second values of the optical power required for the patient's eye at distance and reading modes, respectively, and are spaced from each other by a zone of continuous focus defined in accordance with addition of said lens, the method comprising the steps of: determination of said distributions of optical power and optical distortions in said progressive lens; determination of a location of intersection of a line of sight of the patient's eye for at least said reading mode with a plane defined by the frame of the spectacles, relative to said frame; and positioning said progressive lens via at least one of a horizontal translation, a vertical translation, and a rotation of the lens relative to said frame so as to ensue that said location is positioned substantially in the near vision zone, and a line connecting said location at the reading mode with said far vision zone lies substantially within said zone of the continuous focus.

Claim 23

A system for adjusting a progressive lens relative to a frame of a patient's spectacles, the lens having distributions of an optical power and optical distortions therein defining far and near vision zones which are located in accordance with respective prescribed first and second values of the optical power required for the patient's eye at distance and reading modes, respectively, and are spaced from each other by a zone of continuous focus defined in accordance with addition of said lens, the system comprising: (i) a device for the determination of a location of intersection of a line of sight of the patient's eye at said reading mode with a plane defined by the frame of the spectacles, relative to said frame; and (ii) a device for positioning of said progressive lens relative to said frame so as to ensure that said location at the reading mode is positioned substantially in said near vision zone, and a line connecting said location at the reading- mode with said far vision zone lies substantially within said zone of the continuous focus.

Claim 24

A system for adjusting a progressive lens relative to a frame of a patient's spectacles, the lens having distributions of an optical power and optical distortions therein defining far and near vision zones which are located in accordance with respective prescribed first and second values of the optical power required for the patient's eye at distance and reading modes, respectively, and are spaced from each other by a zone of continuous focus defined in accordance with addition of said lens, the system comprising: (i) a device for the determination of a location of intersection of a line of sight of the patient's eye at said reading mode with a plane defined by the frame of the spectacles, relative to said frame; and (ii) a device for positioning of said progressive lens relative to said frame so as to ensure that said location at the reading mode is positioned substantially in said near vision zone, and a line connecting said location at the reading- mode with said far vision zone lies substantially within said zone of the continuous focus.

Claim 38

A system for adjusting a progressive lens relative to a frame of a patient's spectacles, wherein the lens has distributions of an optical power and distortions therein defining far and near vision zones which are located in accordance with respective prescribed first and second values of the optical power required for the patient's eye at distance and reading vision, respectively, and are spaced from each other by a zone of continuous focus defined in accordance with addition of the lens, the system comprising: a mapping device for the determination of the distributions of said optical power and of said optical distortions of said progressive lens; a means for determination of a location of intersection of a line of sight of the patient's eye for at least said reading mode with a plane defined by the frame of the spectacles, relative to said frame; and a device for positioning of said progressive lens via at least one of a horizontal translation, a vertical translation, and a rotation of the lens relative to said frame so as to ensure that said location at the reading mode is positioned substantially in said near vision zone, and a line connecting said location at the reading mode with said far vision zone lies substantially with said zone of the continuous focus.

Claim 39

A system for adjusting a progressive lens relative to a frame of a patient's spectacles, wherein the lens has distributions of an optical power and distortions therein defining far and near vision zones which are located in accordance with respective prescribed first and second values of the optical power required for the patient's eye at distance and reading vision, respectively, and are spaced from each other by a zone of continuous focus defined in accordance with addition of the lens, the system comprising: a mapping device for the determination of the distributions of said optical power and of said optical distortions of said progressive lens; a means for determination of a location of intersection of a line of sight of the patient's eye for at least said reading mode with a plane defined by the frame of the spectacles, relative to said frame; and a device for positioning of said progressive lens via at least one of a horizontal translation, a vertical translation, and a rotation of the lens relative to said frame so as to ensure that said location at the reading mode is positioned substantially in said near vision zone, and a line connecting said location at the reading mode with said far vision zone lies substantially with said zone of the continuous focus.

Claim 43

A method of edging a spectacle progressive lens to fit into a contour frame opening (10a, 10b) of a spectacle frame to be worn by a person, the frame opening generally defining a frame plane; (a) wherein a person wearing the frame has a natural reading line of sight (52) which passes through the frame opening and intersects the frame plane at a near-vision intersection point (34a, 34b), and the person wearing the frame has a natural distant line of sight (54) which passes through the frame opening and intersects the frame plane at a far-vision intersection point (32a, 32b); (b) the spectacle lens including a near-vision zone (3a, 3b), a far-vision zone (2a, 2b), and a zone of continuous focus (4a) therebetween; the method comprising: edging the lens such that, when the lens is mounted in the frame opening, (c) a center of the near-vision zone is located substantially at the near-vision intersection point, (d) a center of the far-vision zone is located substantially at the far-vision intersection point, and (e) a line connecting the center of the near-vision zone to the center of the far-vision zone lies entirely within the zone of continuous focus of the lens.

Claim 44

A method of edging a spectacle progressive lens to fit into a contour frame opening (10a, 10b) of a spectacle frame to be worn by a person, the frame opening generally defining a frame plane; (a) wherein a person wearing the frame has a natural reading line of sight (52) which passes through the frame opening and intersects the frame plane at a near-vision intersection point (34a, 34b), and the person wearing the frame has a natural distant line of sight (54) which passes through the frame opening and intersects the frame plane at a far-vision intersection point (32a, 32b); (b) the spectacle lens including a near-vision zone (3a, 3b), a far-vision zone (2a, 2b), and a zone of continuous focus (4a) therebetween; the method comprising: edging the lens such that, when the lens is mounted in the frame opening, (c) a center of the near-vision zone is located substantially at the near-vision intersection point, (d) a center of the far-vision zone is located substantially at the far-vision intersection point, and (e) a line connecting the center of the near-vision zone to the center of the far-vision zone lies entirely within the zone of continuous focus of the lens.