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The Acuity 181™ (tisilfocon A) and Acuity 181™ (tisilfocon A) with Tangible™ Hydra-PEG® SPHERICAL Rigid Gas Permeable (RGP) Contact Lens is indicated for daily wear for the correction of refractive error in aphakic and not aphakic persons with non-diseased eyes with myopia or hvperopia. The Acuity 181™ (tisilfocon A) and Acuity 181™ (tisilfocon A) with Tangible™ Hydra-PEG® TORIC Rigid Gas Permeable (RGP) Contact Lens is indicated for daily wear for the correction of refractive error in aphakic and not aphakic persons with non-diseased eyes with myopia or hyperopia and/or possesses refractive astigmatism not exceeding 10.00 diopters. The Acuity 181™ (tisilfocon A) and Acuity 181™ (tisilfocon A) with Tangible™ Hydra-PEG® MULTIFOCAL/BIFOCAL Rigid Gas Permeable (RGP) Contact Lens is indicated for daily wear for the correction of refractive error in aphakic and not aphakic persons with non-diseased eyes with myopia or hyperopia and/or possesses refractive astigmatism not exceeding 4.00 diopters and are presbyopic requiring add power of up to +4.00 diopters. The Acuity 181™ (tisilfocon A) and Acuity 181™ (tisilfocon A) with Tangible™ Hydra-PEG® IRREGULAR CORNEA Daily Wear Contact Lens may be prescribed in otherwise non-diseased eyes that require a rigid gas permeable lens for the management of irregular corneal conditions such as; keratoconus, pellucid marginal degeneration or following penetrating keratoplasty or refractive (e.g. LASIK) surgery. The Acuity 181™ (tisilfocon A) and Acuity 181™ (tisilfocon A) with Tangible™ Hydra-PEG® ORTHOKERATOLOGY contact lenses are indicated for daily wear in an orthokeratology fitting program for the temporary reduction of myopia of up to 5.00 diopters with eyes having astigmatism up to 1.50 diopters in non-diseased eyes. To maintain the orthokeratology effect of myopia reduction, lens wear must be continued on a prescribed wearing schedule. Furthermore, eyes suffering from certain ocular surface disorders may benefit from the physical protection, aqueous hydrated environment and the saline bath provided by scleral lens designs. Acuity 181™ (tisilfocon A) and Acuity 181™ (tisilfocon A) with Tangible™ Hydra-PEG® (tisilfocon A) SCLERAL lenses are indicated for therapeutic use for the management of irregular and distorted corneal surfaces where the subject: l . cannot be adequately corrected with spectacle lenses 2. requires a rigid gas permeable contact lens surface to improve vision 3. is unable to wear a corneal rigid gas permeable lens due to corneal distortion or surface irregularities. Common causes of corneal distortion include but are not limited to corneal infections, trauma, tractions as a result of scar formation secondary to refractive surgery (e.g. LASIK or radial keratotomy) or corneal transplantation. Causes may also include corneal degeneration ( e.g. keratoconus, keratoglobus, pellucid marqinal degeneration. Salzmann's nodular degeneration) and corneal dystrophy (e.g., lattice dystrophy, granular corneal dystrophy, Reis-Bucklers dystrophy, Cogan's dystrophy). The Acuity 181™ (tisilfocon A) and Acuity 181™ (tisilfocon A) with Tangible™ Hydra-PEG® (tisilfocon A) SCLERAL lenses are indicated for therapeutic use in eyes with ocular surface disease (e.g. ocular Graft-versus-Host disease, Sjogren's syndrome, dry eye syndrome and Filamentary Keratitis}, limbal stem cell deficiency ( e.g. Stevens-Johnson syndrome, chemical radiation and thermal burns), disorders of the skin ( e.g. atopy, ectodermal dysplasia), neurotrophic keratitis (e.g. Herpes simplex, Herpes zoster, Familial Dysautonomia), and corneal exposure ( e.g. anatomic, paralytic) that might benefit from the presence of an expanded tear reservoir and protection against an adverse environment. When prescribed for therapeutic use for a distorted cornea or ocular surface disease, the Acuity 181™ (tisilfocon A) and Acuity 181™ (tisilfocon A) with Tangible™ Hydra-PEG® (tisilfocon A) (tisilfocon A) SCLERAL lenses may concurrently provide correction of refractive error. Eyecare practitioners may prescribe the lenses or frequent/ planned replacement wear, with cleaning, disinfection and scheduled replacement. When prescribed for frequent/planned replacement wear, the lens may be cleaned and disinfected using a chemical (not heat) lens care system.

Acuity 181™ (tisilfocon A) Rigid Gas Permeable Contact Lens is manufactured from a machine latheable rigid gas permeable material composed of siloxanyl fluoromethacrylate copolymer that is tinted for visibility and available with or without an ultraviolet (UV) light absorber. The lenses may be plasma treated during the manufacturing process. Acuity 181™ (tisilfocon A) with Tangible™ Hydra-PEG® Contact Lenses are treated to incorporate Hydra-PEG® Technology (HPT), which is a thin polyethylene glycol (PEG)-based polymer that is covalently (permanently) bonded to the surface of the contact lens and is designed to enhance the surface properties of the contact lens while retaining the mechanical properties of the underlying material. When coated with Tangible™ Hydra-PEG® the underlying material, tisilfocon A, is encapsulated in a thin layer of polymer that results in measurable improvement of wettability (sessile drop contact angle compared to untreated lenses). Acuity 181™ (tisilfocon A) and Acuity 181™ (tisilfocon A) with Tangible™ Hydra-PEG® Rigid Gas Permeable Contact Lens are available in spherical, toric, multifocal/bifocal, orthokeratology, and scleral design for daily wear only.

The Acuity 200™ (fluoroxyfocon A), Acuity 100™ (hexafocon A), Acuity 200™ with Tangible® Hydra-PEG® (fluoroxyfocon A), and Acuity 100™ with Tangible® Hydra-PEG® (hexafocon A) Rigid Gas Permeable Contact Lenses are indicated for daily wear for the correction of refractive error (myopia, presbyopia and/or astigmatism) in aphakic and non-aphakic persons with non-diseased eyes. The lenses may be prescribed for daily wear in otherwise nondiseased eyes that require a rigid contact lens for the management of irregular corneal conditions such as keratoconus, pellucid marginal degeneration, or following penetrating keratoplasty or refractive (e.g., LASIK) surgery. The Acuity 200™ (fluoroxyfocon A), Acuity 100™ (hexafocon A), Acuity 200™ with Tangible® Hydra-PEG® (fluoroxyfocon A), and Acuity 100™ with Tangible® Hydra-PEG® (hexafocon A) Rigid Gas Permeable Contact Lenses are also indicated for therapeutic use in eyes with ocular surface disease (e.g. ocular Graft-versus-Host disease, Sjögren's syndrome, dry eve syndrome and Filamentary Keratitis), limbal stem cell deficiency (e.g. Stevens-Johnson syndrome, chemical radiation and thermal burns), disorders of the skin (e.g. atopy, ectodermal dysplasia), neurotrophic keratitis (e.g. Herpes simplex, Herpes zoster, Familial Dysautonomia), and corneal exposure (e.g. anatomic, paralytic) that might benefit from the presence of an expanded tear reservor and protection against an adverse environment. When prescribed for therapeutic use for a distorted cornea or ocular surface disease, the lens may concurrently provide correction of refractive error. The Acuity 200™ (fluoroxyfocon A), Acuity 100™ (hexafocon A), Acuity 200™ with Tangible® Hydra-PEG® (fluoroxyfocon A), and Acuity 100™ with Tangible® Hydra-PEG® (hexafocon A) Rigid Gas Permeable Contact Lenses may be cleaned and disinfected using a chemical (not heat) lens care system.

The Acuity 200™ (fluoroxyfocon A), Acuity 100™ (hexafocon A), Acuity 200™ with Tangible® Hydra-PEG® (fluoroxyfocon A), and Acuity 100™ with Tangible® Hydra-PEG® Rigid Gas Permeable Contact Lenses are manufactured from machine latheable rigid gas permeable materials composed of siloxanyl fluoromethacrylate copolymers that are tinted for visibility and available with or without an ultraviolet (UV) light absorbers. Acuity 200™ with Tangible® Hydra-PEG® (fluoroxyfocon A), and Acuity 100™ with Tangible® Hydra-PEG® Rigid Gas Permeable Contact Lenses are treated to incorporate Hydra-PEG Technology developed by Tangible Sciences. This PEG polymer is permanently attached to the surface and is designed to enhance surface (wetting) properties while not affecting the mechanical or optical properties of the underlying material. The Acuity 200™ (fluoroxyfocon A), Acuity 100™ (hexafocon A), Acuity 200™ with Tangible® Hydra-PEG® (fluoroxyfocon A), and Acuity 100™ with Tangible® Hydra-PEG® Rigid Gas Permeable Contact Lenses for daily wear are made available in spherical, toric, multifocal, scleral and aspheric designs.

Acuity™ 100 (hexafocon A) with Tangible™ Hydra-PEG® Rigid Gas Permeable Contact Lenses are indicated for daily wear for the correction of refractive error (myopia, presbyopia and/or astigmatism) in aphakic and non-aphakic persons with non-diseased eyes. The lenses may be prescribed for daily wear in otherwise non-diseased eyes that require a rigid contact lens for the management of irregular corneal conditions such as keratoconus, pellucid marginal degeneration, or following penetrating keratoplasty or refractive (e.g., LASIK) surgery. The lens may be disinfected using a chemical disinfection system only. TYRO™ 97 (hofocon A) with Tangible™ Hydra-PEG® Rigid Gas Permeable Contact Lenses are indicated for daily wear for the correction of visual acuity in non-aphakic persons with non-diseased eyes that are myopic, hyperopic or presbyonic and which may exhibit corneal astigmatism. Also, the lenses may be prescribed in otherwise non-diseased eyes that require a gas permeable contact lens for the management of irregular corneal conditions such as keratoconus, pellucid marginal degeneration, or following penetrating keratoplasty or refractive (e.g., LASIK) surgery. The lenses may be disinfected only by using chemical disinfection.

Acuity 100™ (hexafocon A) are available as lathe cut rigid gas permeable contact lenses for daily wear only. The lenses are manufactured from a currently marketed contact lens material, hexafocon A. comprised of a siloxanyl fluoromethacrylate copolymer (fluorosilicone acrylate monomers), tinted for visibility, and with or without UV light absorber. Non-proprietary names were assigned by the United States Adopted Names Council (USAN). Acuity 100™ (hexafocon A) Rigid Gas Permeable Contact Lenses are treated to incorporate Tangible™ Hydra-PEG® surface coating, which is a thin, polyethylene glycol (PEG) based polymer that is covalently bonded to the surface of the contact lens and is designed to enhance the surface properties of the contact lens while retaining the mechanical properties of the underlying material. When treated with Tangible™ Hydra-PEC® , the underlying material is encapsulated in a thin layer of polymer that results in measurable improvement of wettability (sessile drop contact angle) compared to untreated lenses. TYRO" -97 (hofocon A) Rigid Gas Permeable Contact Lenses are available as lathe cut rigid gas permeable contact lenses for daily wear only. The lenses are manufactured from currently marketed contact lens material. hofocon A. polymer of trifluoroethyl methacrylate and silicone methacrylate (fluorosilicone acrylate monomers), tinted for visibility, with or without UV light absorber. Non-proprietary names were assigned by the United States Adopted Names Council (USAN). TYRO""-97 (hofocon A) Rigid Gas Permeable Contact Lenses are treated to incorporate Tangible™ Hydra-PEG® surface coating, which is a thin, polyethylene glycol (PEG) based polymer that is covalently bonded to the surface of the contact lens and is designed to enhance the surface properties of the contact lens while retaining the mechanical properties of the underlying material. When treated with Tangible™ Hydra-PEG® .the underlying material is encapsulated in a thin laver of polymer that results in measurable improvement of wettability (sessile drop contact angle) compared to untreated lenses.

Acuity 200™ with Tangible® Hydra PEG® (fluoroxyfocon A) Rigid Gas Permeable Contact Lens is indicated for daily wear for the correction of refractive error (myopia, hyperopia, presbyopia and/or astigmatism) in aphakic persons with non-diseased eyes. The lenses may be prescribed for daily wear in otherwise non-diseased eyes that require a rigid contact lens for the management of irregular corneal conditions such as keratoconus, pellucid marginal degeneration, or following penetrating keratoplasty or refractive (e.g., LASIK) surgery. The Acuity™ 200 with Tangible® Hydra-PEG® (fluoroxyfocon A) Rigid Gas Permeable Contact Lens may be cleaned and disinfected using a chemical (not heat) lens care system.

Acuity 200™ with Tangible® Hydra PEG® (fluoroxyfocon A) Rigid Gas Permeable Contact Lens is manufactured from a machine latheable rigid gas permeable material composed of siloxanyl fluoromethacrylate copolymer that is tinted for visibility and available with or without an ultraviolet (UV) light absorber. Acuity 200™ with Tangible® Hydra PEG® (fluoroxyfocon A) Rigid Gas Permeable Contact Lens is treated to incorporate Hydra-PEG Technology developed by Tangible Sciences. This PEG polymer is permanently attached to the surface and is designed to enhance surface (wetting) properties while not affecting the mechanical or optical properties of the underlying material. Acuity 200™ with Tangible® Hydra PEG® (fluoroxyfocon A) Rigid Gas Permeable Contact Lenses are daily wear rigid gas permeable contact lenses: - in the power range of -20.00 to +20.00 diopters for spheres . - with base curves of 4.0 mm to 11.50 mm ● - with base curve chord of 6.0 mm to 6.5 mm ● - with diameters of 7.0 to 21.0 mm The lens material incorporates an ultraviolet light absorber and lenses are lathe cut in the following designs: spherical, toric, multifocal, scleral and aspheric surfaces in visibility tinted material.

The Acuity 200™ (fluoroxyfocon A) Rigid Gas Permeable Contact Lens is indicated for daily wear for the correction of refractive error (myopia, hyperopia, presbyopia and/or astigmatism) in aphakic and non-aphakic persons with non-diseased eyes. The lenses may be prescribed for daily wear in otherwise non-diseased eyes that require a rigid contact lens for the management of irregular corneal conditions such as keratoconus, pellucid marginal degeneration, or following penetrating keratoplasty or refractive (e.g., LASIK) surgery. The Acuity 200™ (fluoroxyfocon A) Rigid Gas Permeable Contact Lens may be cleaned and disinfected using a chemical (not heat) lens care system.

The Acuity 200™ (fluoroxyfocon A) Rigid Gas Permeable Contact Lens is manufactured from a machine latheable rigid gas permeable material composed of siloxanyl fluoromethacrylate copolymer that is tinted for visibility and available with or without an ultraviolet (UV) light absorber. The Acuity 200™ (fluoroxyfocon A) Rigid Gas Permeable Contact Lens for daily wear is made available in spherical, toric, multifocal, scleral and aspheric designs in the following lens parameters: Parameter | Range | Tolerance ---|---|--- Base Curve | 4.00mm to 11.5mm | ± 0.05 mm Center Thickness | 0.08mm to 0.75mm | ± 0.02 mm Diameter | 7.0mm to 21.0mm | ±0.10mm Spherical Power | -20.00D to +20.00D | ± 0.12 (0 to = 5D)<br> ± 0.18 (5 to = 10.0D)<br> ± 0.25 (10 to = 15D)<br> ± 0.37 (15 to = 20D)<br> ± 0.50 (over 20D) Cylindrical Power | Up to 9.00D | ± 0.25 (0 to = 2D)<br> ± 0.37 (2 to = 4D)<br> ± 0.50 (over 4D) Multifocal Power | +1.00D to 4.00D | ± 0.25D Surface Appearance | | Lenses should be clear with no surface<br>defect The following table depicts the physical properties of the Acuity 200™ (fluoroxyfocon A) Rigid Gas Permeable Contact Lens: | | Acuity 200™ (fluoroxyfocon A) Rigid Gas Permeable Contact Lens | |-----------------------------|--------------------------------------------------------------------------------| | Refractive Index | 1.430 | | Modulus (MPa) | 1194 | | Hardness (Shore D) | 78 | | Specific Gravity | 1.18 | | Oxygen Permeability<br>(Dk) | 200 x 10⁻¹¹ (cm²/sec) (ml O₂/ml x mm Hg @ 35 °C) | | Color Additives | Visibility Tints – D&C Green #6, D&C Violet #2, Solvent Yellow 18, D&C Red #17 |

The Acuity 200™ (fluoroxyfocon A) Rigid Gas Permeable Contact Lenses are indicated for the correction of refractive error (myopia, presbyopia and/or astigmatism) in aphakic and non-aphakic persons with non-diseased eyes. The lens may be prescribed in spheric powers ranging from -20.00 D to +20.00 D for daily wear.

The Acuity 200™ (fluoroxyfocon A) Rigid Gas Permeable Contact Lens is manufactured from a machine latheable rigid gas permeable material composed of siloxanyl fluoromethacrylate copolymer that is tinted for visibility and available with or without an ultraviolet (UV) light absorber. The Acuity 200™ (fluoroxyfocon A) Rigid Gas Permeable Contact Lenses are daily wear rigid gas permeable contact lenses: - . in the power range of -20.00 to +20.00 diopters for spheres - with base curves of 4.0 mm to 11.50 mm - with base curve chord of 6.0 mm to 6.5 mm ● - with diameters of 7.0 to 21.0 mm ● The lens material incorporates an ultraviolet light absorber and lenses are lathe cut in the following designs: spherical, toric, multifocal, scleral and aspheric surfaces in visibility tinted material.

The Acuity 100 (hexafocon A), Acuity 85 (oprifocon A), Acuity 58 (enflufocon B) and Acuity 18 (enflufocon A) Rigid Gas Permeable Contact Lenses are indicated for daily wear for the correction of refractive error (myopia, hyperopia, presbyopia and/or astigmatism) in aphakic and non-aphakic persons with non-diseased eyes. The lens may be prescribed in spherical and aspheric powers ranging from -20.00 D to +20.00 D for daily wear. The lenses may be prescribed for daily wear in otherwise non-diseased eyes that require a rigid contact lens for the management of irregular corneal conditions such as keratoconus, pellucid marginal degeneration, or following penetrating keratoplasty or refractive (e.g., LASIK) surgery. The lens may be disinfected using a chemical disinfection system only. The lenses may be stored in a multipurpose solution (BOSTON SIMPLUS or Menicon Unique pH) solution up to 30 days.

The Acuity Polymers Rigid Gas Permeable Contact Lenses are daily wear rigid gas permeable contact lenses comprised of fluoro-silicon acrylate copolymers wet shipped in Boston SIMPLUS Multi-Action Solution or Menicon Unique pH Multi-purpose solution.

The Acuity 85™ (oprifocon A) Rigid Gas Permeable Contact Lenses are indicated for daily wear for the correction of refractive error (myopia, bresbyopia and/or astigmatism) in aphakic and non-aphakic persons with nondiseased eyes. The lens may be prescribed in spherical and aspheric powers ranging from -20.00 D for daily wear. The lenses may be prescribed for daily wear in otherwise non-diseased eyes that require a rigid contact lens for the management of irregular corneal conditions such as keratoconus, pellucid marginal degeneration, or following penetrating keratoplasty or refractive (e.g., LASIK) surgery. The lens may be disinfected using a chemical disinfection system only.

The Acuity 85™ (oprifocon A) Rigid Gas Permeable Contact Lenses are daily wear rigid gas permeable contact lenses: - in the power range of -20.00 to +20.00 diopters for sphere - with base curves of 4.0 mm to 11.50 mm - with base curve chord of 6.0 mm to 6.5 mm - with diameter of 7.0 to 21.0 mm The lens material (oprifocon A) incorporates an ultraviolet light absorber and lenses are lathe cut contact lenses in the following designs: spherical, toric, multifocal, and aspheric surfaces in visibility tinted material.

The Acuity 58™ (en:flufocon B) Rigid Gas Permeable Contact Lenses are indicated for daily wear for the correction of refractive error (myopia, hyperopia, presbyopia and/or astigmatism) in aphakic and non-aphakic persons with nondiseased eyes. The lens may be prescribed in spheric powers ranging from -20.00 D to +20.00 D for daily wear. The lenses may be prescribed for daily wear in otherwise non-diseased eyes that require a rigid contact lens for the management of irregular corneal conditions such as keratoconus, pellucid marginal degeneration, or following penetrating keratoplasty or refractive (e.g., LASIK) surgery. The lens may be disinfected using a chemical disinfection system only.

The Acuity 58™ (enflufocon B) Rigid Gas Permeable Contact Lenses are daily wear rigid gas permeable contact lenses: - in the power range of -20.00 to +20.00 diopters for sphere - with base curves of 4.0 mm to 11.50 mm - with base curve chord of 6.0 mm to 6.5 mm - with diameter of 7.0 to 21.0 mm The lens material (enflufocon B) incorporates an ultraviolet light absorber and lenses are lathe cut in the following designs: spherical, toric, multifocal, and aspheric surfaces in visibility tinted material from which these lenses are made and the contact lenses described herein are substantially equivalent to the Boston EO Material and Contact Lenses (enflufocon B) described K980741.

The Acuity 1800 (enflufocon A) Rigid Gas Permeable Contact Lenses are indicated for daily wear for the correction of refractive error (myopia, hyperopia, presbyopia and/or astigmatism) in aphakic and non-aphakic persons with nondiseased eyes. The lens may be prescribed in spheric powers ranging from -20.00 D to +20.00 D for daily wear. The lenses may be prescribed for daily wear in otherwise non-diseased eyes that require a rigid contact lens for the management of irregular corneal conditions such as keratoconus, pellucid marginal degeneration, or following penetrating keratoplasty or refractive (e.g., LASIK) surgery. The lens may be disinfected using a chemical disinfection system only.

The Acuity 18TM (enflufocon A) Rigid Gas Permeable Contact Lenses are daily wear rigid gas permeable contact lenses: - in the power range of -20.00 to +20.00 diopters for sphere - with base curves of 4.0 mm to 11.50 mm - with base curve chord of 6.0 mm to 6.5 mm ● - . with diameter of 7.0 to 21.0 mm The lens material enflufocon A) incorporates an ultraviolet light absorber and lenses are lathe cut contact lenses in the following designs: spherical, toric, multifocal, and aspheric surfaces in visibility tinted material. The material from which these lenses are made and the contact lenses described herein are substantially equivalent to the Boston ES (AKA Boston 7-30) Material and Contact Lenses (enflufocon A) described K943177 and K053124.