Table 2 Factor loading, eigenvalues, and percent of variance for ASQE items emerging from the principal components analysis

6

I feel unsure or hesitant when putting something on a table

7

I miss the other person’s hand when trying to shake hands.

8

I have difficulty parking my car.

9

I find it difficult to put the cap on a pen or marker.

10

I find it difficult to put a power plug into a socket.

11

I have difficulties pouring drinks.

12

I have difficulties walking down stairs.

22

I have difficulty making eye contact in a one-on-one conversation.

23

I have difficulty making eye contact with people in a group conversation.

25

Because of my misaligned eyes I feel insecure.

26

If I did not have misaligned eyes, I would have more self-confidence.

14

I have difficulties finding my way in a shopping mall, especially when I am there for the first time.

15

I have difficulties finding my way in a department store or a supermarket, especially when I am there for the first time.

16

I have difficulties finding my way in a train station, especially when I am there for the first time.

4

I can estimate distances well.

5

I have good depth perception

21

I have to squint or shut one eye in bright sunlight.

13

I have difficulties playing ball games.

17

I see double.

18

Double vision disturbs me in my daily activities (household, study, school, hobbies, work).

19

When I am tired, I must be very careful not to miss what I reach for.

20

I have to do things more slowly when I am tired because of my eyesight.

1

I can see equally well with both eyes.

2

I worry about losing my better eye.

3

I worry that something might get into my better eye.