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| ID | Type | Description | Link |
|---|---|---|---|
| R01715 | Other Identifier | CMFT |
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| Name | Class |
|---|---|
| National Institute for Health Research, United Kingdom | OTHER_GOV |
| University of Manchester | OTHER |
| Cardiff University | OTHER |
| Bangor University |
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Over 1 million people in the UK suffer from untreatable visual impairment, many of them elderly. The major complaint of visually impaired people is their inability to carry out simple tasks, especially those involving reading. It is known that this activity limitation is a major cause of depression in an older population, and it is reflected in reduced quality of life. Low vision clinics, mostly based within hospital ophthalmology departments, dispense optical magnifiers to allow patients to carry out these tasks again, but these devices do have limitations (unusual posture, short working distance, monocular viewing). Although electronic magnifiers have been around since the 1960s, they were initially very large and expensive. Recent advances in technology have brought about an explosion in the number and range of portable and moderately-priced aids, which can be used binocularly, in a natural working position: these are currently not available through the NHS. Evidence is needed as to whether these portable hand-held electronic magnifiers could offer a significant benefit to the majority of patients, and therefore whether they should be routinely dispensed in low vision clinics.
The proposed study is a two-arm randomised crossover trial with existing users of optical magnifiers being assigned to use a hand-held electronic magnifier in addition to their existing devices for 2 months. Reading and task performance will be measured with the aid, and compared to the performance with optical aids, and the patient will be asked to report on the comparisons between the aids.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| portable electronic magnifier | Experimental | Use of a prescribed electronic magnifier plus existing optical aids for a period of 2 months |
|
| optical aids | Active Comparator | Use of existing optical aids for 2 months |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| portable electronic magnifier | Procedure |
|
|
| Measure | Description | Time Frame |
|---|---|---|
| usage of magnifiers | Use of Manchester Low Vision Questionnaire to quantify device usage | Change from baseline at 2 months and 4 months |
| reading speed | Reading speed using the device assessed by MNREAD test | Change from baseline at 2 months and 4 months |
| Measure | Description | Time Frame |
|---|---|---|
| speed of performance of activities of daily living | total time taken to performance 5 selected activities of daily living using aids if required | Change from baseline at 2 months and 4 months |
| difficulty with near vision activities |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Chris M Dickinson, PhD | University of Manchester | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Manchester Royal Eye Hospital | Manchester | M13 9WL | United Kingdom |
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| OTHER |
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| optical aids | Procedure |
|
|
Use of NV-VFQ-15 questionnaire to self-rate difficulty in performance of near vision activities
| Change from baseline at 2 months and 4 months |
| health related quality of life | Use of EQ-5D and VISQOL questionnaires to self-rate health-related quality of life | Change from baseline at 2 months and 4 months |
| well-being | use of WHO-5 questionnaire to self-rate wellbeing | Change from baseline at 2 months and 4 months |
| ID | Term |
|---|---|
| D008224 | Lymphoma, Follicular |
| D014786 | Vision Disorders |
| ID | Term |
|---|---|
| D008228 | Lymphoma, Non-Hodgkin |
| D008223 | Lymphoma |
| D009370 | Neoplasms by Histologic Type |
| D009369 | Neoplasms |
| D008232 | Lymphoproliferative Disorders |
| D008206 | Lymphatic Diseases |
| D006425 | Hemic and Lymphatic Diseases |
| D007160 | Immunoproliferative Disorders |
| D007154 | Immune System Diseases |
| D012678 | Sensation Disorders |
| D009461 | Neurologic Manifestations |
| D009422 | Nervous System Diseases |
| D005128 | Eye Diseases |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
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