title: Wearable telescopic contact lens.
abstract: We describe the design, fabrication, and testing of a 1.6 mm thick scleral contact lens providing both 1× and 2.8× magnified vision paths, intended for use as a switchable eye-borne telescopic low-vision aid. The F/9.7 telescopic vision path uses an 8.2 mm diameter annular entrance pupil and 4 internal reflections in a polymethyl methacrylate precision optic. This gas-impermeable insert is contained inside a smooth outer casing of rigid gas-permeable polymer, which also provides achromatic correction for refraction at the curved lens face. The unmagnified F/4.1 vision path is through the central aperture of the lens, with additional transmission between the annular telescope rings to enable peripheral vision. We discuss potential solutions for providing oxygenation for an extended wear version of the lens. The prototype lenses were characterized using a scale-model human eye, and telescope functionality was confirmed in a small-scale clinical (nondispensed) demonstration.
authors.forename: Ashkan
authors.initials: A
authors.lastname: Arianpour
authors.forename: Glenn M
authors.initials: GM
authors.lastname: Schuster
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Tremblay
authors.forename: Igor
authors.initials: I
authors.lastname: Stamenov
authors.forename: Alex
authors.initials: A
authors.lastname: Groisman
authors.forename: Jerry
authors.initials: J
authors.lastname: Legerton
authors.forename: William
authors.initials: W
authors.lastname: Meyers
authors.forename: Goretty Alonso
authors.initials: GA
authors.lastname: Amigo
authors.forename: Joseph E
authors.initials: JE
authors.lastname: Ford
mesh_terms: D000328:Adult; D015331:Cohort Studies; D003198:Computer Simulation; D003261:Contact Lenses; D004867:Equipment Design; D005740:Gases; D006801:Humans; D007368:Interferometry / Q000379:methods; D008268:Macular Degeneration / Q000628:therapy; D055095:Optics and Photonics; D010100:Oxygen / Q000737:chemistry; D010539:Permeability; D011108:Polymers / Q000737:chemistry; D014785:Vision, Ocular
chemical_list: D005740:Gases; D011108:Polymers; D010100:Oxygen