Effectiveness of portable electronic and optical magnifiers for near vision activities in low vision: a randomised crossover trial

Taylor, John; Bambrick, Rachel; Brand, Andrew; Bray, Nathan; Dutton, Michelle; Harper, Robert A.; Hoare, Zoë; Ryan, Barbara; Edwards, Rhiannon Tudor; Waterman, Heather; Dickinson, Christine

doi:10.1111/opo.12379

Cited by 32 publications

(25 citation statements)

References 29 publications

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“…In the U.K., research has found portable electronic magnifiers to be the device of choice for leisure reading in experienced optical magnifier users, and a cost-effective supplement to optical devices. 10,11 Together, these findings support the importance of electronic magnifier provision, even in a setting with limited financing.…”

Section: Discussionmentioning

confidence: 54%

Utilization and Abandonment of Low Vision Devices Prescribed on a Mobile Clinic

et al. 2018

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Section: Discussionmentioning

confidence: 54%

Utilization and Abandonment of Low Vision Devices Prescribed on a Mobile Clinic

et al. 2018

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“…This is probably due to the fact that optical magnifier with higher magnification power restrict the field of vision distinctively. Besides that, p-EVES allow handling in habitual distance and better contrast [43]. Despite that, all patients could read fastest with CCTV.…”

Section: Discussionmentioning

confidence: 99%

Visual rehabilitation of patients with corneal diseases

et al. 2020

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Background: Although most patients with visual impairment due to corneal diseases can be treated successfully with surgery, some require visual rehabilitation to restore reading ability. To evaluate the best LVAs especially in terms of reading speed and characterize this specific patient group we performed a prospective, randomized crossover trial. Methods: All 34 patients underwent a detailed examination (slit-lamp, funduscopy, SD-OCT, ETDRS) as screening. Only patients with corneal diseases without other ocular diseases were included. Reading-speed was assessed with International-Reading-Speed-Texts (IReST) consecutively with five different LVAs (low vision aids) during one day in a randomized cross-over design. Corneal haze was quantified with corneal densitometry (Pentacam). Results: Patients were either visually impaired (n = 28), severely impaired (n = 4) or legally blind (n = 2). Patients read significantly faster with LVAs (p < 0.0001). Fastest reading speed could be achieved with video magnifier (CCTV). Optical magnifier and portable-electronic magnifier enabled significantly lower reading speeds (p < 0.01). In a subgroup of patients (VA < 3/60,n = 6) black background enabled patients to read significantly faster compared to white background (p = 0.03). Conclusion: Patients with low magnification requirement can be treated successfully with optical LVAs and portable-electronic magnifiers. More severely afflicted patients need a CCTV. Black background enables fastest reading-speeds, probably due to less blinding. Visual impairment can be estimated with corneal densitometry. Our trial confirms the capability of LVAs to successfully restore the reading ability in patients with corneal diseases, which is a crucial part of visual rehabilitation. Trial registration: This trial was registered at the German Clinical Trials Register as DRKS00010887 at 09.08.2016.

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“…In another crossover study comparing the near vision activity performance of 84 experienced users of optical aids when using portable electronic vision enhancement systems plus optical magnifiers or optical magnifiers alone, it was observed that, at 2 months, the use of electronic systems allowed longer duration of reading. In addition, participants reported less difficulty performing a range of near vision activities when using these systems and were able to perform more tasks independently [70].…”

Section: Electronic Aidsmentioning

confidence: 99%

Evidence-Based Practice and Trends in Visual Rehabilitation for Patients with Age-Related Macular Degeneration

Leal-Vega¹,

Herrero²,

Gutiérrez³

et al. 2022

Recent Advances and New Perspectives in Managing Macular Degeneration

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Age-related macular degeneration (AMD) is a common, chronic, and progressive eye disease that is considered the leading cause of visual loss among the elderly in developed countries. Advanced AMD, including choroidal neovascularization (CNV) or geographic atrophy (GA), is associated with substantial and progressive visual impairment that can lead to a significant reduction in functional independence and quality of life (QoL) for affected individuals, whose number is expected to increase in the coming years in line with population growth and ageing. In this context, while an important part of medical care is focused on preventing the progression of the disease, Visual Rehabilitation (VR) aims to address its consequences by providing these patients with a number of strategies to achieve their goals and participate autonomously, actively and productively in society. This chapter aims to provide an update on evidence-based practices in the field and how modern technologies play an important role in the development of new VR approaches.

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Effectiveness of portable electronic and optical magnifiers for near vision activities in low vision: a randomised crossover trial

Abstract: The study provides evidence that p-EVES devices can play a useful role in supplementing the range of low vision aids used to reduce activity limitation for near vision tasks.

Cited by 32 publications

References 29 publications

Utilization and Abandonment of Low Vision Devices Prescribed on a Mobile Clinic

Utilization and Abandonment of Low Vision Devices Prescribed on a Mobile Clinic

Visual rehabilitation of patients with corneal diseases

Evidence-Based Practice and Trends in Visual Rehabilitation for Patients with Age-Related Macular Degeneration

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