Advanced Glaucoma and Low Vision: Evaluation and Treatment

Robison, Scott

doi:10.1007/978-0-387-76700-0_31

Cited by 5 publications

(8 citation statements)

References 17 publications

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“…[3][4][5][6] Rehabilitation interventions for reading difficulties are often linked to magnification, and can fall into two main categories: low-tech with the use of tools such as loupes, and high-tech through the use of electronic magnification such as closed-circuit televisions or head-mounted devices. [7][8] The recent development of portable electronic devices that can be used for reading, such as the Apple iPad, offer an alternative magnification tool to those that are traditionally used in rehabilitation. However, there is little evidence to show how effective portable electronic reading devices are as low-vision aids or how they compare against existing magnification aids.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Apple iPad as a low-vision reading aid

Morrice

Johnson

Marinier

et al. 2017

Eye

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PurposeLow-vision clients frequently report having problems with reading. Using magnification, reading performance (as measured by reading speed) can be improved by up to 200%. Current magnification aids can be expensive or bulky; therefore, we explored if the Apple iPad offers comparable performance in improving reading speeds, in comparison with a closed-circuit television (CCTV) video magnifier, or other magnification devices.MethodsWe recruited 100 participants between the ages of 24-97 years, with low vision who were literate and cognitively capable, of whom 57 had age-related macular degeneration. To assess reading, participants read standardized iReST texts and were tested for comprehension. We compared reading speed on the Apple iPad (10 inch) with that of the CCTV, home magnification devices, and baseline measures.ResultsAll assistive devices improved reading rates in comparison to baseline (P<0.001, Hedge's g>1), however, there was no difference in improvement across devices (P>0.05, Hedge's g<0.1). When experience was taken into account, those with iPad experience read, on average, 30 words per minute faster than first time iPad users, whereas CCTV experience did not influence reading speed.ConclusionsIn our sample, the Apple iPad was as effective as currently used technologies for improving reading rates. Moreover, exposure to, and experience with the Apple iPad might increase reading speed with that device. A larger sample size, however, is needed to do subgroup analysis on who would optimally benefit from each type of magnification device.

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Section: Introductionmentioning

confidence: 99%

Assessment of the Apple iPad as a low-vision reading aid

Morrice

Johnson

Marinier

et al. 2017

Eye

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“…In one study, patients with visual field loss secondary to their glaucoma showed a diminished traffic gap judgment when crossing the street, which leads to an increased risk of harm. As a whole, the group made 23% more errors in identifying a gap as crossable when the gap was too narrow to be made safely 7. Another study found that 25% of patients with visual field loss in both the eyes reported a moderate-to-severe restriction in their mobility activities overall 8.…”

Section: Introductionmentioning

confidence: 97%

“…As a whole, the group made 23% more errors in identifying a gap as crossable when the gap was too narrow to be made safely. 7 Another study found that 25% of patients with visual field loss in both the eyes reported a moderate-to-severe restriction in their mobility activities overall. 8 Field loss secondary to glaucoma has also been shown to lead to a lower vision-related quality of life score.…”

Section: Introductionmentioning

confidence: 97%

“…In patients with advanced glaucomatous optic neuropathy, functional loss is often observed with mobility issues and difficulty ambulating. 7 In one study, patients with visual field loss secondary to their glaucoma showed a diminished traffic gap judgment when crossing the street, which leads to an increased risk of harm. As a whole, the group made 23% more errors in identifying a gap as crossable when the gap was too narrow to be made safely.…”

Section: Introductionmentioning

confidence: 99%

“… 9 When examined collectively, these reports and others suggest that individuals with reduced visual fields and glaucoma experience more falls, more motor vehicle accidents, greater overall difficulty with mobility activities and an overall decreased quality of living. 7 Best-corrected central visual acuity can vary over a wide range among patients with moderate-to-severe glaucoma, but overall, central vision reduction occurs late in the disease. 10 Mild central and diffuse reduction in fields can also be found in the early stages of glaucoma.…”

Section: Introductionmentioning

confidence: 99%

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Clinical effectiveness of currently available low-vision devices in glaucoma patients with moderate-to-severe vision loss

Patodia¹,

Golesic²,

Mao³

et al. 2017

OPTH

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PurposeThe aim of this trial is to study the effectiveness of currently available low-vision devices in glaucoma patients with moderate-to-severe vision loss.DesignThis is a randomized pilot clinical trial.ParticipantsSixteen low-vision glaucoma patients participated in this study.MethodsPatients with a best-corrected visual acuity between 20/70 and 20/400 in the better eye and a diagnosis of stable primary or secondary open-angle glaucoma were randomized to a low-vision treatment group or a nonintervention control group. A telephone interview was conducted before and after the 4-week testing period to assess functional vision. Patients placed in the treatment group received a low-vision examination and used various currently available low-vision aids. Patients placed in the control group received a low-vision examination only. Changes in patients’ reading ability and overall visual ability were chosen as the primary outcomes. Other visual functioning domains (mobility, visual information processing and visual motor skills) were considered as secondary outcomes.ResultsTen patients in the treatment group showed a significant improvement in reading ability and overall visual ability compared to the control group. The difference in mean score for reading ability was 2.52 logits (2.02; P<0.05) and overall visual ability was 0.78 logits (0.64; P<0.05). However, no significant improvement was noted in the other visual functioning domains involving mobility and visual motor skills.ConclusionCurrently available low-vision devices primarily enhance central vision with limited benefits to functional activities relying on peripheral vision.

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Assessing optimal colour and illumination to facilitate reading

Morrice

Murphy

Soldano

et al. 2021

Ophthalmic Physiologic Optic

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Purpose This study examined the effectiveness of the LuxIQ, the Apple iPad and a smart bulb in assessing optimal colour and illumination to facilitate reading in younger, older and visually impaired adults. Methods Participants read standardised texts at baseline (normal lighting/no device), then using the Apple iPad, LuxIQ and smart bulb, with their normal vision (20/20 condition) and using a simulated reduction in visual acuity/contrast sensitivity (20/80 condition). Visually impaired participants followed the same procedure used in the 20/80 condition. Results There was a significant interaction between condition and device in younger, F(1.5, 43.51) = 30.41, p < 0.001, ω2 = 0.34 and older, F(1.5, 4.51) = 4.51, p = 0.03, ω2 = 0.05 adults with normal vision, and there was a significant effect of device, F(2, 58) = 5.95, p = 0.004, ω2 = 0.12 in visually impaired adults. In the 20/20 condition, age and colour predicted reading speed, F(3, 176) = 36.25, p < 0.001, Adj. R2 = 0.37, whereas age, lighting and colour predicted reading speed, F(3, 176) = 36.25, p < 0.001, Adj. R2 = 0.37 in the 20/80 condition. In the visual impairment condition, lighting, colour and impairment severity predicted reading speed, F(3, 85) = 10.10, p < 0.001, Adj. R2 = 0.24. Conclusions The clinical implications of this study are that reading speeds improve in individuals with low vision under improved lighting conditions, specifically, with higher levels of luminance and colour temperature. The effectiveness of the devices varied across groups; however, the LuxIQ was the only device to improve reading speeds from baseline in older adults with visual impairments.

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Advanced Glaucoma and Low Vision: Evaluation and Treatment

Cited by 5 publications

References 17 publications

Assessment of the Apple iPad as a low-vision reading aid

Assessment of the Apple iPad as a low-vision reading aid

Clinical effectiveness of currently available low-vision devices in glaucoma patients with moderate-to-severe vision loss

Assessing optimal colour and illumination to facilitate reading

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