Development of the Ultra-Low Vision Visual Functioning Questionnaire (ULV-VFQ)

Jeter, Pamela E.; Rozanski, Collin; Massof, Robert W.; Adeyemo, Olukemi; Dagnelie, Gislin

doi:10.1167/tvst.6.3.11

Cited by 31 publications

(26 citation statements)

References 57 publications

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“… 11 Another questionnaire that some implantation sites are using is the Prosthetic Low Vision Rehab (PLoVR) or the Ultra-Low Vision Visual Functioning Questionnaire (ULV-VFQ) that have been developed specifically for patients with very low vision. 12 …”

Section: Patient Selectionmentioning

confidence: 99%

Argus II retinal prosthesis system: a review of patient selection criteria, surgical considerations, and post-operative outcomes

Finn¹,

Grewal²,

Vajzovic³

2018

OPTH

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Retinitis pigmentosa (RP) is a group of heterogeneous inherited retinal degenerative disorders characterized by progressive rod and cone dysfunction and ensuing photoreceptor loss. Many patients suffer from legal blindness by their 40s or 50s. Artificial vision is considered once patients have lost all vision to the point of bare light perception or no light perception. The Argus II retinal prosthesis system is one such artificial vision device approved for patients with RP. This review focuses on the factors important for patient selection. Careful pre-operative screening, counseling, and management of patient expectations are critical for the successful implantation and visual rehabilitation of patients with the Argus II device.

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Section: Patient Selectionmentioning

confidence: 99%

Argus II retinal prosthesis system: a review of patient selection criteria, surgical considerations, and post-operative outcomes

Finn¹,

Grewal²,

Vajzovic³

2018

OPTH

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“…6 Briefly summarized, the items were derived from a larger set of 760 activities for which focus groups of individuals with ULV reported still making use of their rudimentary vision. 7 A larger pool of individuals with ULV was recruited as respondents for the ULV-VFQ prototype.…”

Section: Methodsmentioning

confidence: 99%

Optimizing the ULV-VFQ for Clinical Use Through Item Set Reduction: Psychometric Properties and Trade-Offs

Dagnelie

Jeter

Adeyemo

2017

Trans. Vis. Sci. Tech.

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PurposeWe examine the dimensionality of the 150-item visual functioning questionnaire for individuals with ultralow vision (ULV-VFQ) and develop representative abbreviated versions, facilitating clinical use, while retaining compatibility with a 17-item performance assessment.MethodsSubsets with 50 and 23 items covering the full difficulty range were selected, with evenly spaced item measures (IMs) and good representation of visual aspects and functional domains. Person measures (PMs) for the anchored subsets were derived through Rasch analysis of data from 80 respondents.ResultsFit statistics for the reduced item sets were similar to those for the full set, with reliabilities at or above 95%. Mean PMs in the reduced sets were within 0.8 standard errors (SEs) of those in the full set. SEs of the PMs increased from the SE for 150 items, roughly in inverse proportion with the square root of the set size. Unexplained variance levels (24%–27%) and variance of the first unexplained factor (3.3%–3.9%) were close to those (30% and 2.6%) for 150 items. Differential item functions for omitted items were negligible. Aspects and domains are adequately represented in the reduced sets.ConclusionsSelf-reported visual ability can be measured accurately using appropriately chosen anchored subsets of the ULV-VFQ. Functional ability of individuals with ULV is characterized adequately by a single dimension.Translational RelevanceThe ULV-VFQ50 and ULV-VFQ23, using anchored IMs from the 150-item ULV-VFQ, provide an efficient and reliable self-report assessment of visual ability in individuals whose visual impairment is too severe for assessment with VFQs currently in use.

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“…Finally, there is also a considerable gap between visual prosthesis device implementation and the rehabilitative challenges that arise from these new technologies. Thus, although prosthetic vision rehabilitation has many parallels with low-vision rehabilitation, also differs in many ways from native vision (Jeter et al, 2017). As a consequence, the modest success achieved to date with human experimentation is not merely limited by the technical issues that remain to be solved but is also significantly related to our limited knowledge on how to communicate with a visually deprived brain.…”

Section: Patient Selection and Visual Rehabilitationmentioning

confidence: 99%

Development of visual Neuroprostheses: trends and challenges

Fernández

2018

Bioelectron Med

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Visual prostheses are implantable medical devices that are able to provide some degree of vision to individuals who are blind. This research field is a challenging subject in both ophthalmology and basic science that has progressed to a point where there are already several commercially available devices. However, at present, these devices are only able to restore a very limited vision, with relatively low spatial resolution. Furthermore, there are still many other open scientific and technical challenges that need to be solved to achieve the therapeutic benefits envisioned by these new technologies. This paper provides a brief overview of significant developments in this field and introduces some of the technical and biological challenges that still need to be overcome to optimize their therapeutic success, including long-term viability and biocompatibility of stimulating electrodes, the selection of appropriate patients for each artificial vision approach, a better understanding of brain plasticity and the development of rehabilitative strategies specifically tailored for each patient.

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Development of the Ultra-Low Vision Visual Functioning Questionnaire (ULV-VFQ)

Cited by 31 publications

References 57 publications

Argus II retinal prosthesis system: a review of patient selection criteria, surgical considerations, and post-operative outcomes

Argus II retinal prosthesis system: a review of patient selection criteria, surgical considerations, and post-operative outcomes

Optimizing the ULV-VFQ for Clinical Use Through Item Set Reduction: Psychometric Properties and Trade-Offs

Development of visual Neuroprostheses: trends and challenges

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