Table 1

Visual function questionnaire

VariableQuestionGrading
Self assessment of visionIn general, would you say your vision (with glasses if you are wearing them) is:very good, 1; good, 2; fair, 3; poor, 4
Visual function:
Limitation of daily activitiesTo what extent does your eye sight limit you in your daily activities?not at all, 1; a little, 2; quite a bit, 3; a lot, 4
 Recognition of faceDo you have a problem recognising the face of a person standing near you?not at all, 1; a little, 2; quite a bit, 3; a lot, 4
 Identifying small objectsDo you have a problem recognising small or minute objects (such as grains or the lines on your hand)?not at all, 1; a little, 2; quite a bit, 3; a lot, 4
 Dark adaptationDo you have a problem adjusting to darkness after being in bright light?not at all, 1; a little, 2; quite a bit, 3; a lot, 4
 Light adaptationDo you have a problem adjusting to brightness after being in a dark place?not at all, 1; a little, 2; quite a bit, 3; a lot, 4