Corneal optic formed of degradation resistant polymer
First Claim
1. An implantable mask, comprising:
- a central optical axis;
an anterior surface extending between an outer periphery and an inner periphery of the mask, the anterior surface configured to reside adjacent a first layer of the stroma of a cornea;
a posterior surface extending between the outer periphery and the inner periphery of the mask, the posterior surface configured to reside adjacent a second layer of the stroma of the cornea;
a mask thickness between the anterior and posterior surfaces of less than about 20 microns;
a substantially opaque annular portion extending between the anterior and posterior surfaces and from the inner periphery toward the outer periphery, the opaque portion configured to substantially prevent transmission of light;
an aperture disposed about the central optical axis and configured to transmit substantially all light directed toward the aperture, the aperture having a dimension generally transverse to the optical axis of about 2.2 millimeters or less, wherein the aperture is surrounded by an inner peripheral region, a hole region, and an outer peripheral region wherein the inner peripheral region is generally concentric with and located between the aperture and the hole region, and the hole region extends from the inner peripheral region to the outer peripheral region; and
a plurality of transport holes having a hole entrance at the anterior surface and extending from the anterior surface to the posterior surface, the hole entrances configured such that sufficient transport of tissue maintaining substances through the mask between the first and second stromal layers is adapted to prevent depletion of tissue maintaining substances that would harm adjacent stromal layers;
wherein substantially all of the holes are located in the hole region and the holes are positioned at irregular locations to minimize the generation of visible artifacts due to the transmission of light through the holes, the inner peripheral region and the outer peripheral region are substantially free of holes, andthe implantable mask is formed from a material comprising a highly fluorinated polymeric material in which the number of carbon-fluorine bonds equals or exceeds the number of carbon-hydrogen bonds in the highly fluorinated polymeric material.
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Accused Products
Abstract
Disclosed are mask optics configured to be implanted in a cornea of a patient. In one embodiment, the body of the optic has a light transmitting portion, a light blocking portion disposed about the light transmitting portion, and an outer periphery surrounding the light blocking portion. The optic is adapted to reside between two intracorneal layers of a cornea. The mask optic may be formed from a material comprising a highly fluorinated polymeric material and an opacification agent. Preferred highly fluorinated polymeric materials include polyvinylidene fluoride (PVDF) and preferred opacification agents include carbon. The highly fluorinated polymeric material is preferably resistant to degradation upon exposure to ultraviolet light.
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Citations
36 Claims
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1. An implantable mask, comprising:
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a central optical axis; an anterior surface extending between an outer periphery and an inner periphery of the mask, the anterior surface configured to reside adjacent a first layer of the stroma of a cornea; a posterior surface extending between the outer periphery and the inner periphery of the mask, the posterior surface configured to reside adjacent a second layer of the stroma of the cornea; a mask thickness between the anterior and posterior surfaces of less than about 20 microns; a substantially opaque annular portion extending between the anterior and posterior surfaces and from the inner periphery toward the outer periphery, the opaque portion configured to substantially prevent transmission of light; an aperture disposed about the central optical axis and configured to transmit substantially all light directed toward the aperture, the aperture having a dimension generally transverse to the optical axis of about 2.2 millimeters or less, wherein the aperture is surrounded by an inner peripheral region, a hole region, and an outer peripheral region wherein the inner peripheral region is generally concentric with and located between the aperture and the hole region, and the hole region extends from the inner peripheral region to the outer peripheral region; and a plurality of transport holes having a hole entrance at the anterior surface and extending from the anterior surface to the posterior surface, the hole entrances configured such that sufficient transport of tissue maintaining substances through the mask between the first and second stromal layers is adapted to prevent depletion of tissue maintaining substances that would harm adjacent stromal layers; wherein substantially all of the holes are located in the hole region and the holes are positioned at irregular locations to minimize the generation of visible artifacts due to the transmission of light through the holes, the inner peripheral region and the outer peripheral region are substantially free of holes, and the implantable mask is formed from a material comprising a highly fluorinated polymeric material in which the number of carbon-fluorine bonds equals or exceeds the number of carbon-hydrogen bonds in the highly fluorinated polymeric material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A mask optic comprising:
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an aperture having a major axis of about 2.2 mm or less; and an annular body extending between the aperture and an outer periphery of the mask, the annular body being substantially opaque, wherein the annular body comprises an anterior surface, a posterior surface, and a plurality of holes extending between the anterior surface and the posterior surface, said holes being positioned at irregular locations to minimize diffraction patterns visible to the patient; an inner peripheral region and a hole region, the inner peripheral region being located between the aperture and the hole region, wherein the inner peripheral region is substantially devoid of holes; and wherein the annular body is formed of a material comprising a highly fluorinated polymeric material, wherein the number of carbon-fluorine bonds in the highly fluorinated polymeric material equals or exceeds the number of carbon-hydrogen bonds, and an opacification agent, the opacification agent being present in sufficient quantity to prevent at least a substantial portion of light incident on the anterior surface from being transmitted from the anterior surface to the posterior surface. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A corneal inlay for treating presbyopia, comprising:
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an anterior surface extending between an outer periphery and an inner periphery of the corneal inlay, the anterior surface configured to reside adjacent a first layer of the stroma of a cornea; a posterior surface extending between the outer periphery and the inner periphery of the corneal inlay, the posterior surface configured to reside adjacent a second layer of the stroma of the cornea; a corneal inlay thickness between the anterior and posterior surfaces of less than about 20 microns; a substantially opaque portion extending between the anterior and posterior surfaces and between the outer periphery and the central optical axis, the opaque portion comprising an inner region, an outer region, and a central region disposed between the inner and outer regions, the opaque portion configured to substantially prevent transmission of light; an aperture disposed about the central optical axis and configured to transmit substantially all incident light, the aperture having a dimension generally transverse to the optical axis, the dimension being about 2.2 millimeters or less; a plurality of transport holes having a hole entrance at the anterior surface and extending from the anterior surface to the posterior surface, the hole entrances providing an open area of the corneal inlay such that sufficient transport of tissue maintaining substances through the corneal inlay between the first and second stromal layers is enabled to prevent depletion of tissue maintaining substances that would harm adjacent stromal layers; wherein the holes are positioned at irregular locations between the inner region and the outer region to minimize the generation of visible artifacts due to the transmission of light through the holes; wherein the inner region and outer region are devoid of open area; and the corneal inlay is formed from a material comprising a highly fluorinated polymeric material in which the number of carbon-fluorine bonds equals or exceeds the number of carbon-hydrogen bonds in the highly fluorinated polymeric material.
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Specification