Behind the Lens Telescope: A New Concept in Bioptics

Spitzberg, Larry A.; Jose, Randall T.; Kuether, Christian L.

doi:10.1097/00006324-198909000-00008

Cited by 9 publications

(2 citation statements)

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“…22,[34][35][36] Our Ocutech VES mini telescope has a fixed magnification of 3×. Subjects with a visual acuity worse than 0.16 (20/125) theoretically need more than 3× magnification to reach the limiting acuity value for driving of 0.5 (20/40).…”

Section: Biopticmentioning

confidence: 99%

A Demonstration Project on Driving with Reduced Visual Acuity and a Bioptic Telescope System in the Netherlands

Melis-Dankers

Kooijman

Brouwer

et al. 2008

Visual Impairment Research

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Background: In Europe, driving a passenger car is prohibited if binocular best corrected visual acuity (BCVA) is below 0.5 (20/40). Some US states allow people with reduced visual acuity to use a bioptic telescope system when driving. The aim of our study is to introduce a bioptic telescope system for driving in the Netherlands and to investigate whether it enables people with reduced visual acuity to gain sufficient practical fitness to drive in a European setting. Results: Out of 378 persons who applied for information following media attention for the project, 160 candidates volunteered to participate. Based on the available information, 36 subjects (binocular BCVA: 0.16-0.5 [20/125-20/40]) were invited for assessment (vision, mobility, cognitive function, and driving skills). Of these, 16 did not meet the inclusion criteria and 2 decided not to participate. The remaining 18 subjects were trained in the use of a monocular bioptic telescope (3× magnification). They all completed the predriving training successfully and received driving lessons from specialized professional driving instructors. Eventually, 9 subjects passed the official on-road test of practical fitness to drive, 7 were excluded after a number of driving lessons, and another 2 withdrew on their own initiative. Conclusion: This is the first study in Europe to prepare subjects with reduced visual acuity to drive with the use of a bioptic telescope system. About 55% of the preselected subjects fulfilled all inclusion criteria. Half of the subjects who entered the bioptic training program passed the official fitness to drive test, demonstrating that they could drive smoothly and safely in Dutch traffic using a bioptic telescope system. INTODUCTIONWithout a doubt, vision is crucial for the complex task of driving a motor vehicle and constitutes the main input of information to the driver. Reduction of visual function can limit the ability to drive a car safely and, for this reason, official minimum requirements regarding the visual capacity of

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Section: Biopticmentioning

confidence: 99%

A Demonstration Project on Driving with Reduced Visual Acuity and a Bioptic Telescope System in the Netherlands

Melis-Dankers

Kooijman

Brouwer

et al. 2008

Visual Impairment Research

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“…The telescope might be located on the central field of the spectacle lens (for reading tasks), but more commonly in the upper field as a bioptic approach for distance tasks, and they can be used binocularly or monocularly (binocular multiplexing) [1]. There are intrinsic limitations to this approach, from cosmetic [2] to more fundamental issues, in particular, these devices have a restricted field of view [3,4] that necessitates the continuous scanning of objects using movements of the head. Alternatives to spectacle mounted telescopes, include the combination of a high positive power spectacle lens with a high negative power contact lens [5] or an intraocular lens [6] (after removal of the crystalline lens optics in cataract surgery) to form a magnified images on the retina.…”

Section: Introductionmentioning

confidence: 99%

An aspheric intraocular telescope for age-related macular degeneration patients

Tabernero¹,

Qureshi²,

Robbie³

et al. 2015

Biomed. Opt. Express

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Abstract:We have designed an intraocular telescope for the posterior chamber of the human eye of patients with age related macular degeneration. The basic design is composed of two decentered high optical power lenses ( + 66D and −66D) inducing a 3° prismatic effect to project a magnified central field of view into a healthier location off the central fovea. Aspheric surfaces were used to ensure a compromise between good optical quality and high tolerance to the final axial position of both lenses after surgery. With this particular design, the telescope affords an extended range of depth of focus, high tolerance to different axial lengths of the eye and robustness against typical values of astigmatism and higher order aberrations. The final design has been manufactured in a foldable material and is compact enough to facilitate surgical implantation. This telescope is a simple but promising intraocular visual aid for AMD patients. IMT-002 Study Group, "Implantable miniature telescope for the treatment of visual acuity loss resulting from end-stage age-related macular degeneration:

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Driving with Low Vision

Peli

Moharrer

2022

Albert and Jakobiec's Principles and Practice of Ophthalmology

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Behind the Lens Telescope: A New Concept in Bioptics

Cited by 9 publications

References 0 publications

A Demonstration Project on Driving with Reduced Visual Acuity and a Bioptic Telescope System in the Netherlands

A Demonstration Project on Driving with Reduced Visual Acuity and a Bioptic Telescope System in the Netherlands

An aspheric intraocular telescope for age-related macular degeneration patients

Driving with Low Vision

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