Biased eyeglass frames
First Claim
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1. An eyeglass, containing a nonpowered decentered eyeglass lens which is optically corrected in an as-worn orientation with respect to the normal line of sight of a wearer, comprising:
- an investment cast metal frame; and
at least one lens attached to the frame and positioned by the frame such that the lens is adapted to have a predetermined orientation with respect to the wearer'"'"'s normal line of sight, said lens having an outer surface conforming to a portion of the surface of a first sphere having a first center and an inner surface conforming to a portion of the surface of a second sphere having a second center, and an optical centerline extending through the first and second centers;
wherein the frame maintains the lens in an as-worn orientation such that the optical centerline is adapted to be maintained substantially parallel to and spaced vertically and horizontally apart from the wearer'"'"'s normal line of sight.
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Abstract
Disclosed are dimensionally stable eyeglass orbitals, pivotably mounted in an eyeglass frame. In one embodiment, the eyeglass orbitals are investment cast from substantially pure titanium or a titanium based alloy. The orbitals hold the lenses in the as-worn orientation such that the optical centerline of each lens extends in a predetermined relationship with respect to the wearer'"'"'s theoretical straight ahead line of sight.
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Citations
21 Claims
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1. An eyeglass, containing a nonpowered decentered eyeglass lens which is optically corrected in an as-worn orientation with respect to the normal line of sight of a wearer, comprising:
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an investment cast metal frame; and at least one lens attached to the frame and positioned by the frame such that the lens is adapted to have a predetermined orientation with respect to the wearer'"'"'s normal line of sight, said lens having an outer surface conforming to a portion of the surface of a first sphere having a first center and an inner surface conforming to a portion of the surface of a second sphere having a second center, and an optical centerline extending through the first and second centers; wherein the frame maintains the lens in an as-worn orientation such that the optical centerline is adapted to be maintained substantially parallel to and spaced vertically and horizontally apart from the wearer'"'"'s normal line of sight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An eyeglass containing a nonpowered decentered eyeglass lens, comprising:
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a frame adapted to permit limited bending movement upon application of an external force, said frame being biased to return to a predetermined configuration upon removal of the external force; and at least one lens attached to said frame, said lens having an outer surface conforming to a portion of a surface of a first sphere having a first center and an inner surface conforming to a portion of a surface of a second sphere having a second center, and an optical centerline extending through the first and second centers; wherein said frame is adapted to maintain said lens in an as-worn orientation with both wrap and rake such that the optical centerline is substantially parallel to and spaced vertically and horizontally apart from the wearer'"'"'s normal line of sight. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification