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Authors
RYAN, BARBARA Bsc(Hons), MCOptom; COURT, HELEN Bsc(Hons); MARGRAIN, TOM H. PhD, Bsc, MILT, MCOptom

Measuring Low Vision Service Outcomes: Rasch Analysis of the Seven-Item National Eye Institute Visual Function Questionnaire

publication date
October 20, 2007
Category
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Abstract/Introduction

Purpose

To describe a short, functional visual disability instrument capable of measuring the outcomes of a government funded country-wide multicenter low vision service in Wales and to determine if postal implementation might lead to response bias.

Methods

Seven items from the National Eye Institute Visual Function Questionnaire (NEI VFQ), which have previously been shown to be responsive to low vision service intervention, were incorporated into a postal questionnaire which was given to patients before they attended the all Wales Low Vision Service. Rasch analysis was used to describe the instrument's psychometric properties.


Conclusion/Results

Results

Rasch analysis of 490 completed questionnaires showed that all seven questions worked together to form a unidimensional scale. By combining the first two response categories, category utilization and targeting was improved. There were no significant differences in the age (p = 0.29), gender (p = 0.75), distance binocular Visual Acuity (VA; p = 0.86), living situation (p = 0.34) or prevalence of macular degeneration (p = 0.31) between those who returned a completed questionnaire and those who did not.

Conclusions

The seven-item National Eye Institute Visual Function Questionnaire is an appropriate and precise outcome measure that is acceptable to patients and easy to administer. It measures aspects of near, reading, and distance visual disability that have been shown to be amenable to low vision service provision and, therefore, it should be highly responsive to this intervention and facilitate inter-service assessment. We found no evidence to suggest that postal implementation results in response bias. The instrument is an appropriate measure of patient based outcomes for a large-scale, multicenter low vision service.


Testimonials


I haven't actually used the optometrist side, so my review is limited to the vision therapy offered.  This office was recommended by my occupational therapist for the treatment of my double vision following a stroke.


Claire A.

Love this location. I had a brain injury accident from day one one. All the team make you feel you still important and hope in the horizon after when the medical system fell you miserably. Dr. Ikeda very professional and very understanding about your issue. Two tombs up.


Jim K.

My husband and I were immediately impressed with Dr Ikeda. I was hit by a car while cycling which caused broken bones and three brain injuries. The brain injuries caused double vision. Dr. Ikeda examined my eyes and got me started on vision therapy with his occupational therapist who specializes in vision therapy.  She (Chris) is absolutely great.  I am impressed with the array of tools used to help recover my binocular vision.  I am doing things I never thought were possible (balance boards etc).  Chris pushes me and keeps me motivated. I really enjoy my sessions with her.  The office staff is always friendly and they have a wonderful appointment reminder tool that makes it easy to keep my calendar up to date. I am happy the rehab center at Little Co. of Mary recommended them!!


Teresa S.

The Vision Therapy is handled in a separate office through a different door from the shared waiting room. Chris, the vision therapist, has a wide and varied assortment of tools, equipment and resources to best evaluate and treat most vision issues. After just a few visits, my double vision became easier to control, using exercises developed during the therapy process. It was time well-spent.


Joe M.

I have been coming here since I can remember. I love it here. The staff is so amazing and nice. They explain everything they gonna do and never make you feel rushed. Dr. Ikeda has always been my doctor and I would never want another one. He is the doctor for my whole family and is always asking how everyone is doing. I am also so crazy about picking out my frames and have to try so many and each person who helps me take the time and lets me try them all on. I would never want to go anywhere else! I definitely would recommend this office to anyone looking for a great eye doctor.


Kayla W.

This is not for the eye exam but for the frames selection portion. I brought my prescription from Kaiser here with my VSP insurance. The reception staff was very polite and professional.  Manny helped me to pick out frames and explain my coverage.  Very helpful and patient not like the individual at the other place I rated here on Yelp.  I was running late and he still helped me and was not bothered at all.  I am so glad I came here ..........very pleased.

Very professional staff and pleasant.


Daniel G.
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