Appendix 2.

Characteristics of questionnaires.

PAPER	NAME	PURPOSE OF QUESTIONNAIRE	MEASUREMENT FACTORS AS DISCOVERED BY EXPLORATORY FACTOR ANALYSIS	COMPLETED BY	RESPONSES	SCORING AND INTERPRETATION
Ferziger et al. 2011	Functional Vision Questionnaire	Description of vision skills	Task orientated visual skills, Basic visual skills	Primary educator	Items rated 1(never), 2(occasionally 25%), 3(some of the time 50%), 4(most of the time 75%), 5(often >75%) or N/A	No final score or instructions for interpretation
McCulloch et al. 2007	Visual Skills Inventory	Description of vision skills	Visual responses to food and objects, Visual responses to social content, Light perception and/or photophobia	Parent/carer	Binary (yes/no) responses for all. Four sub-questions with ordinal scale responses to rate degree of performance.	No final score or instructions for interpretation