Progressive lens and method of manufacture thereof
AssigneeAddon Optics Ltd.
InventorsDan Katzman, Haim Engler
Life of this patent
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Abstract
Apparatus and methods are described including a progressive lens that is configured to provide a far-vision correction and a near-vision correction. The progressive lens includes a single-focus, far-vision corrective lens that is configured to provide only a portion of the far-vision correction, and a film coupled to the single-focus, far-vision corrective lens. The film defines a far-vision corrective portion that is configured to provide the remainder of the far-vision correction, a near-vision corrective portion that is configured to provide additive near-vision correction, and an intermediate portion in which the film transitions between the far-vision corrective portion and the near-vision corrective portion. Other applications are also described.
Claims12
Apparatus comprising:
- a progressive lens that is configured to provide a far-vision correction and a near-vision correction, the progressive lens comprising:
- a single-focus, far-vision corrective lens that is configured to provide only a portion of the far-vision correction;
- and
- a film coupled to the single-focus, far-vision corrective lens, the film comprising a thermoplastic material and being configured to define:
- a far-vision corrective portion that is configured to provide the remainder of the far-vision correction;
- a near-vision corrective portion that is configured to provide additive near-vision correction;
- and
- an intermediate portion in which the film transitions between the far-vision corrective portion and the near-vision corrective portion,
- wherein the far-vision corrective portion of the film is configured to provide a portion of the far-vision correction such that an edge thickness of the film is at least 0.1 mm, and wherein the edge thickness of the film being at least 0.1 mm facilitates manufacture of the film using injection molding of the thermoplastic material when the thermoplastic material is in melted form.
Dependencies are inferred from the claim text.