Switchable telescopic contact lens

Tremblay, Eric J.; Stamenov, Igor; Beer, R. Dirk; Arianpour, Ashkan; Ford, Joseph E.

doi:10.1364/oe.21.015980

Cited by 35 publications

(21 citation statements)

References 9 publications

(13 reference statements)

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“…The RGP material is intended to be Paragon HDS 100, which has permeability of ∼100 × 10 −11 cm 2 ∕s × mL O 2 ∕mL material × mm Hg which, for all purposes of our simulation (a steadystate situation), is equivalent to a combination of 100% solubility and a diffusion coefficient of 0.76 × 10 −6 cm 2 ∕s. The O 2 transport is from the atmosphere through the outer ring-shaped region of the upper shell (above the annular void), through the annular void region (8), towards the thin air cavity (3), and from the air cavity through the lower shell (2) towards the cornea (1). The simulation results indicate a nearly uniform distribution of the O 2 concentration over a plane at 30 μm distance from the bottom surface of the lens in the 11 mm diameter circle just above the cornea, other than in the immediate vicinity of the fin.…”

Section: Research Articlementioning

confidence: 99%

“…This geometry has the advantage of reducing overall lens thickness by a factor equal to approximately the number of internal reflections, and also offers a central clear lens aperture which can be used to provide a separate optical path for unmagnified normal vision. We earlier described [8] a 1.1 mm thick switchable telescopic lens that provided both 1× and 2.8× magnification ( Fig. 1) vision paths.…”

Section: Introductionmentioning

confidence: 99%

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Wearable telescopic contact lens

et al. 2015

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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.

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Section: Research Articlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wearable telescopic contact lens

et al. 2015

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“…Various VFEs have found a broad range of applications in many areas such as 3D microscopy, endoscopy, vision correction, display and so on [5][6][7][8][9][10]. In microscopy and endoscopy, an electrically tunable lens enables flexible volume imaging at high speeds without moving specimen or objective [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…In microscopy and endoscopy, an electrically tunable lens enables flexible volume imaging at high speeds without moving specimen or objective [7][8][9]. Tremblay et al demonstrated a contact lens switchable between normal and magnified vision using the polarization property of liquid crystal [10].…”

Section: Introductionmentioning

confidence: 99%

Digitally switchable multi-focal lens using freeform optics

Wang¹,

Qin²,

Hua³

et al. 2018

Opt. Express

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Optical technologies offering electrically tunable optical power have found a broad range of applications, from head-mounted displays for virtual and augmented reality applications to microscopy. In this paper, we present a novel design and prototype of a digitally switchable multi-focal lens (MFL) that offers the capability of rapidly switching the optical power of the system among multiple foci. It consists of a freeform singlet and a customized programmable optical shutter array (POSA). Time-multiplexed multiple foci can be obtained by electrically controlling the POSA to switch the light path through different segments of the freeform singlet rapidly. While this method can be applied to a broad range of imaging and display systems, we experimentally demonstrate a proof-of-concept prototype for a multi-foci imaging system.

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“…A third proposed design comprises a contact lens with a small, built-in telescope. 7 Although this is the most compact design, the use of a contact lens would not be convenient for occasional use.…”

Section: Introductionmentioning

confidence: 99%

Flat-plate magnifier for magnifying the view of a distant object

et al. 2014

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Abstract. An optically magnifying device for viewing a distant object is proposed. Since this device can be made in the form of a thin plate and can also have a large viewing area, a flat-plate magnifier is realized. The flat-plate magnifier mounted onto an eyeglass frame as a substitute for each lens provides a light-weight, hands-free magnifier. The flat-plate magnifier is made as a 3 to 4-mm-thick plastic plate and can be made up to 30 to 40 mm in diameter. The flat-plate magnifier is a two-dimensional array of magnifying modules and each magnifying module consists of a micromagnifier and a ray angle adjuster. The micromagnifier comprises a concave mirror and a convex mirror and magnifies the view. The ray angle adjuster is a transparent wedge and expands the viewing area. The flat-plate magnifier is designed so that the achromatic condition is satisfied by cancelling the angular dispersion produced by the micromagnifier with that of the ray angle adjuster. A prototype of the flatplate magnifier with a diameter of 9 mm and a magnification power of 3 was demonstrated. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Switchable telescopic contact lens

Cited by 35 publications

References 9 publications

Wearable telescopic contact lens

Wearable telescopic contact lens

Digitally switchable multi-focal lens using freeform optics

Flat-plate magnifier for magnifying the view of a distant object

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