February 17, 2014
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New functional vision questionnaire found to be effective for young people

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Tadic and colleagues developed an age-appropriate self-reporting questionnaire to test functional vision by visually impaired children and young people for use in research and in clinical practice.

Ophthalmology reported that a sample of visually impaired children and young people 10 to 15 years old and a school-based nonrandom expert group sample of visually impaired students 12 to 17 years old participated in testing the questionnaire.

The study abstract explained that the researchers conducted 32 qualitative semi-structured interviews supplemented by narrative feedback from 15 eligible visually impaired (VI) children and young people to produce the draft instrument questionnaire. Seventeen VI students were consulted individually on item relevance and comprehensibility, instrument instructions, format and administration methods. The draft instrument was then piloted with 101 VI children, drawn from 21 hospitals in the United Kingdom.

After piloting the draft version, 20 items were removed for reasons such as high percentage of missing data or skewness. The remaining 36 items showed good measurement precision and targeting, per the abstract.

Tadic and colleagues concluded that the 36-item, four-point unidimensional scale has potential as a complementary adjunct to objective clinical assessments in routine pediatric eye care practice and in research.