Assessing the iPad as a tool for low-vision rehabilitation

Impact of Apps as Assistive Devices for Visually Impaired Persons

The pervasiveness of mobile devices and other associated technologies has affected all aspects of our daily lives. People with visual impairments are no exception, as they increasingly tend to rely on mobile apps for assistance with various visual tasks in daily life. Compared to dedicated visual aids, mobile apps offer advantages such as affordability, versatility, portability, and ubiquity. We have surveyed hundreds of mobile apps of potential interest to people with vision impairments, either released as special assistive apps claiming to help in tasks such as text or object recognition (n = 68), digital accessibility (n = 84), navigation (n = 44), and remote sighted service (n = 4), among others, or marketed as general camera magnification apps that can be used for visual assistance (n = 77). While assistive apps as a whole received positive feedback from visually impaired users, as reported in various studies, evaluations of the usability of every app were typically limited to user reviews, which are often not scientifically informative. Rigorous evaluation studies on the effect of vision assistance apps on daily task performance and quality of life are relatively rare. Moreover, evaluation criteria are difficult to establish, given the heterogeneity of the visual tasks and visual needs of the users. In addition to surveying literature on vision assistance apps, this review discusses the feasibility and necessity of conducting scientific research to understand visual needs and methods to evaluate real-world benefits.

Assessing optimal colour and illumination to facilitate reading: an analysis of print size

PURPOSE

This study examined how optimal colour/illumination conditions and the efficacy of the iPad, LuxIQ and Smart Bulb varied as a function of print size in younger, older and visually impaired adults.

METHODS

Participants with visual impairments and simulated low vision (SLV) read the MNRead using the iPad, LuxIQ and Smart Bulb.

RESULTS

In the impairment condition at 1.20 logMAR, the iPad (M = 9.49, 95% CI [3.18, 19.42]) and LuxIQ (M = 15.95, 95% CI [9.54, 24.86]) improved the reading speeds. At 0.80 logMAR (SLV), all devices improved reading speeds of older adults (iPad (M = 28.70, 95% CI [14.65, 42.51]); LuxIQ (M = 49.63, 95% CI [30.04, 69.68]); Smart Bulb (M = 23.11, 95% CI [3.33, 42.11])), but in younger adults only the LuxIQ (M = 13.04, 95% CI [3.21, 21.27]) did so. In the impairment condition, the iPad (M = 5.54, 95% CI [0.31, 12.13]) and LuxIQ (M = 13.90, 95% CI [7.88, 23.49]) improved reading speeds. In the SLV condition, age was a significant predictor of reading speed at 1.20 logMAR (F_3,164  = 10.74, p < 0.001, Adj. R²  = 0.16). At 0.80 logMAR, age and luminance, but not colour, were significant predictors (F_3,164  = 52.52, p < 0.001, Adj. R²  = 0.49). In the impairment condition, both age and lux were significant predictors of reading speed at 1.20 (F_3,85  = 7.14, p < 0.001, Adj. R²  = 0.20) and 0.80 logMAR (F_3,85  = 7.97, p < 0.001, Adj. R²  = 0.22), but colour was not.

CONCLUSIONS

Light source effectiveness and optimal colour/illumination vary as a function of print size. It appears that print size is the most important factor for improving reading speed. As print size decreases, luminance becomes crucial, and only at the smallest print sizes does the effect of colour become useful.

Low Vision and Dry Eye: Does One Diagnosis Overshadow the Other?

SIGNIFICANCE

The prevalence of dry eye disease and low vision increases with age; they share risk factors and can be the result of underlying common causes. They are generally studied separately; however, combining these perspectives is relevant for research on assistive technology given that sustained focus affects the tear film because of decreased blinking rates.

PURPOSE

The objective of this study was to elucidate to which extent dry eye disease risk factors, signs, and symptoms are assessed in low vision patients who receive an eye examination as part of their vision rehabilitation services.

METHODS

Using a retrospective chart review, dry eye disease risk factors, signs, or symptoms were extracted from 201 randomly selected files that contained an eye examination in the past 5 years from two vision rehabilitation centers.

RESULTS

Demographic variables of charts from the two sites did not differ (mean visual acuity, 0.85 logMAR [standard deviation, 0.53; range, 0 to 2.3]; mean age, 71.2 years [standard deviation, 19 years; range, 24 to 101 years]). Fifty charts (25%) mentioned at least one dry eye disease symptom. Sixty-one charts (30.3%) reported systemic medications that can exacerbate dry eye disease, whereas 99 (49.2%) contained at least one systemic disease thought to contribute to dry eye disease symptoms; 145 (72.1%) mentioned at least one type of ocular surgery. Artificial tears were documented in 74 charts (36.8%). Few specific dry eye tests were performed, with the exception of corneal integrity assessment reported in 18 charts (8.95%).

CONCLUSIONS

Low vision patients have multiple risk factors for dry eye disease; however, dry eye disease tests were not frequently performed in comprehensive low vision eye examinations in this sample. More efforts should be made to assess dry eye disease to enhance comfort and functional vision, especially with the increasing demands of digital devices as visual aids.

Applying Video Modeling to Promote the Handwriting Accuracy of Students with Low Vision Using Mobile Technology

Introduction:

In Taiwan, although many school-aged students with low vision struggle with poor handwriting, there is a lack of evidence-based educational practices for handwriting enhancement. Since the use of mobile technology has increased recently, iPads have been identified as an effective tool to deliver video-based instruction to individuals. In this study, iPads were used to deliver video modeling to provide instruction designed to enhance the handwriting accuracy among students with low vision.

Methods:

A multiple-baseline-across-participants-probe design was used in this study to assess the success of the intervention with three individuals with low vision who were 9, 12, and 14 years of age.

Results:

During the baseline phase, the accuracy for each of the participants was under 50%. After intervention, their handwriting accuracy increased. The participants were also able to maintain their performance during follow-up sessions. Moreover, the study demonstrated good social validity, since the stakeholders all indicated a high level of treatment acceptability for this intervention.

Discussion:

The outcome of this study demonstrates that iPads used with video modeling can lead to improved accuracy in handwriting for students with low vision. The findings also support video modeling as an effective strategy for teaching new skills and may be applied to students with different special learning needs.

Implications for practitioners:

Video modeling is an effective and feasible instructional strategy for practitioners as it can be easily implemented. Additionally, given its built-in visual support, the iPad is an effective instrument that can help students with low vision reach a higher potential for handwriting accuracy. It is worth noting that, in addition to the presence of video modeling, proper instruction, as well as opportunities to practice, is needed for students to produce accurate word formation. Thus, short daily practices combined with the intervention method presented in this study are likely to gain better results for students with low vision.

iPad Use Among Older Women with Low Vision: Follow-Up Focus Group Findings

Technology can enable efficient, effective, and independent performance of daily occupations and enhance social and leisure participation. This paper describes the findings of a qualitative study exploring iPad use during daily activities among adults with low vision. Five women who previously participated in a group iPad intervention participated in the study. Thematic analysis revealed 5 main themes: integration of the iPad into daily routine, benefits and barriers of the iPad, psychosocial factors, preferences regarding iPad use, and group instruction in individual iPad use. Group instruction may be a viable intervention option in low vision rehabilitation to improve occupational participation.

The extent to which mobile applications support independence among the visually impaired - a pilot study

Background and aim: Visual impairment (VI) problems are increasing as the global aging population grows. Mobile devices have become essential to interacting with friends and society. Because the visually impaired are no exception, it would be useful to determine the functionalities that best support the independence of people with VI. The currently available functionalities and applications were analysed to provide insight about which features the visually impaired value most.Materials and methods: A Webropol survey with structured and open-ended questions was carried out. The participants (n = 26) were asked about their use of mobile applications and opinions regarding the usefulness of certain applications in promoting independent functioning. An instrument was developed for this study based on previous literature, and its quality was assured through an expert panel evaluation and pre-testing. The collected data were analysed statistically and by inductive content analysis.Results: A majority of the participants were active users of mobile devices. Substantial variation was observed in the evaluations of how useful various applications are to different everyday tasks. The participants suggested numerous improvements, such as additional customization, to the current mobile devices and applications.Implications for RehabilitationPeople with VI benefit from the use of mobile devices in the same way that the population with normal vision does, and mobile devices and applications can be pivotal to supporting their independence.The participants offered innovative ideas and suggestions for how mobile devices and applications could be designed to better meet the needs of the visually impaired.

Occupational Therapy Interventions to Improve Reading Performance of Older Adults With Low Vision: A Systematic Review

IMPORTANCE

Low vision affects many older adults and is expected to significantly increase over the next several decades. It has a significant impact on all aspects of daily life, including the reading required for participation in occupations.

OBJECTIVE

To determine the effectiveness of interventions within the scope of occupational therapy to improve reading required for the performance of occupations by older adults with low vision.

DATA SOURCES

We conducted a systematic review of literature published in the Cochrane Database of Systematic Reviews, MEDLINE, PsycINFO, CINAHL, and OTseeker databases from 2010 through 2016. The references of retrieved articles were also hand searched.

STUDY SELECTION AND DATA COLLECTION

Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were used to abstract and assess data quality and validity. This review followed the established methodology of the American Occupational Therapy Association Evidence-Based Practice Project.

FINDINGS

Sixteen articles met the inclusion criteria and were categorized into three themes: (1) technology, (2) visual skills training, and (3) multicomponent interventions. Moderate evidence supports stand-based electronic magnification and eccentric viewing training to improve reading outcomes. Strong evidence supports multicomponent interventions.

CONCLUSIONS AND RELEVANCE

Occupational therapy practitioners working with older adults with low vision are strongly encouraged to integrate stand-based electronic magnification, eccentric viewing training, and comprehensive low vision services into routine care. Further research with larger sample sizes and functional reading outcome measures is needed.

WHAT THIS ARTICLE ADDS

This review provides additional support for the use of select occupational therapy interventions (stand-based electronic magnification, eccentric viewing training, and comprehensive low vision services) to support the reading required for occupational performance for older adults with low vision. The findings provide guidance to occupational therapy practitioners for selection and implementation of evidence-based interventions for reading.

Effectiveness of the Apple iPad as a Spot-reading Magnifier

SIGNIFICANCE

There are no data available comparing the iPad as a portable magnification device with a portable video magnifier. Our study supports the use and integration of mainstream tablet computers into vision rehabilitation to overcome potential barriers to device uptake due to the stigma attached to traditional devices.

PURPOSE

Portable personal tablet computers have taken on an important role as assistive devices for individuals with visual impairment; however, their use is rarely supported by independent data. Our study aims to contribute to evidence-based practice by comparing a tablet computer with a portable video magnifier in their use as spot-reading devices.

METHODS

We compared the Optelec Compact 5 HD portable video magnifier (Optelec, Longueuil, Canada) and the Apple iPad Air tablet computer (Apple Inc, Cupertino, CA) using the SuperVision+ Magnifier app by asking 60 adults with low vision (age range, 19 to 97 years; mean visual acuity, 20/136) to spot read information on a bill, a medication box, and a food label. Their ability to complete each task was timed; they completed the Quebec User Evaluation of Satisfaction with assistive Technology questionnaire and indicated their preferred device.

RESULTS

Performance speed indicated that easier tasks were completed faster; however, there were no statistically significant differences in performance between the two device conditions. The highest satisfaction scores for both devices were identical: dimensions, ease of use, and effectiveness. Preference between the two devices was split at 25 for iPad, 33 for the portable closed-circuit television, and 2 for undecided.

CONCLUSIONS

The results indicate that performance speed on our spot-reading tasks was comparable across the two devices. In addition, subjective judgment of the device features and personal preferences lead us to conclude that both the iPad and the portable magnifier may have certain equivalence in their functionality, depending on the user and the task for which they are used.

Randomized Trial of Tablet Computers for Education and Learning in Children and Young People with Low Vision

SIGNIFICANCE

Mobile devices such as tablet computers have become widely available as mainstream devices and are also used in some schools, but there is an absence of robust information regarding the efficacy of any optical/electronic low vision device or tablet computer in supporting education of young people with low vision.

PURPOSE

A randomized controlled trial (RCT) is needed to measure the impact of tablet computers on education, specifically on independent access to educational material, in children and young people with low vision. We conducted a pilot RCT to determine the feasibility of conducting a full-scale trial.

METHODS

This was a randomized multicenter pilot trial across two sites in the United Kingdom and one site in India. Forty children and young people aged 10 to 18 years with low vision (best-corrected visual acuity for distance between <20/60 [0.48 logMAR] and 20/400 [1.30 logMAR] in the better eye) in the United Kingdom (n = 20) and India (n = 20) were randomized to two parallel arms, with a 1:1 allocation ratio, to control (n = 20) or intervention (n = 20). Control group participants received standard low vision care. The intervention group received a tablet computer (iPad) with low vision applications and instruction in its use, including accessibility features. Four primary outcomes included (1) 6-month recruitment rate, (2) retention of participants for 3 months, (3) acceptance/usage of device, and (4) accessibility of device.

RESULTS

Nineteen participants (95%) enrolled within 6 months in the United Kingdom, and 20 participants (100%), in India. Retention at 3 months was 85% (n = 17) in the United Kingdom and 95% (n = 19) in India. More than one half of participants reported using a tablet computer at school at least once every day. The majority (90%) found it easily accessible.

CONCLUSIONS

This study demonstrated that it is feasible to recruit children and young people with low vision into an international multicenter RCT of electronic assistive technology. Regardless of geographical location, children and young people with low vision reported using tablet computers at least once a day at school and accessed them easily.

Development of an English-language version of a Japanese iPad application to facilitate collaborative goal setting in rehabilitation: a Delphi study and field test

OBJECTIVE

This study aimed to investigate the content of an English-language version of a Japanese iPad application designed to facilitate shared decision-making around goal setting in rehabilitation: Aid for Decision-making in Occupational Choice-English (ADOC-E).

DESIGN

Phase 1: Delphi methods to reach consensus with an international group of expert occupational therapists on the text and images in ADOC-E. Phase 2: Testing correct recognition (unprompted and prompted) of images in ADOC-E by health service users in inpatient rehabilitation and residential care.

SETTING

Phase 1: International, online. Phase 2: Three healthcare services in New Zealand-(1) a residential rehabilitation service for traumatic brain injury, (2) a nursing home for frail older adults and (3) an inpatient rehabilitation ward in a public hospital.

PARTICIPANTS

Phase 1: Fourteen experienced occupational therapists from New Zealand (4), Australia (4), UK (2) and USA (4). Phase 2: Twenty-four rehabilitation and residential care service users (10 men, 14 women; 20-95 years; Mini-Mental State Exam scores 13-30).

RESULTS

Four Delphi rounds were required to reach consensus with the experienced occupational therapists on the content of ADOC-E, ending with 100 items covering daily activities that people do and social roles they participate in. Ninety-five per cent (95/100) of ADOC-E items could each be correctly identified by over 80% of service user participants with either unprompted or prompted recognition.

CONCLUSION

While a few of the more abstract concepts in ADOC-E (related to complex social roles) were less likely to be correctly recognised by all participants, the text and images ADOC-E were deemed to be fit for purpose overall and ready for future clinical testing.

Revisiting Vision Rehabilitation

Low vision is a condition caused by eye or brain disease, in which visual acuity is 20/70 (3/10 or 6/18) or poorer in the better-seeing eye and cannot be corrected or improved with regular eyeglasses. It impacts personal ability to perform vision-dependent tasks as activities of daily living, walking, reading or using a computer. Rehabilitation is a multidisciplinary training dedicated to improve patients’ functional abilities and quality of life. It has to be personalized to every individual situation, whatever the underlying pathology.