Table 3.

Item analysis

Item	Missing responses		Floor responses		Ceiling responses
	Number	%	Number	%	Number	%
1. General Health: 5-level health rating	1	0.5	14	8.9	6	3.8
2. General Vision: 6-level general vision	1	0.5	1	0.6	6	3.8
3. Mental Health: Amount true: worry	2	1.3	21	13.4	11	7.0
4. Ocular Pain: Amount pain	2	1.3	1	0.6	55	35.0
5. Near Vision: Reading normal newsprint	4	2.5	21	13.4	38	24.2
6. Near Vision: See well up-close	1	0.5	1	0.6	46	29.3
7. Near Vision: Finding objects on crowded shelf	1	0.5	5	3.2	88	56.1
8. Distance Vision: Reading street signs	2	1.3	6	3.8	64	40.8
9. Distance Vision: Going down stairs at night	2	1.3	2	1.3	61	38.9
10. Peripheral Vision: Seeing objects off to side	2	1.3	1	0.6	82	52.2
11. Social Function: Seeing how people react	2	1.3	2	1.3	99	63.1
12. Color Vision: Difficulty matching clothes	1	0.5	1	0.6	101	64.3
13. Social Function: Visiting others	1	0.5	4	2.5	114	72.6
14. Distance Vision: Going out to movies/plays	6	3.8	56	35.7	56	35.7
15. Driving: Daylight familiar places	21	13.4	84	53.5	52	33.1
16. Driving: At night	50	68.2	1	0.6	12	7.6
17. Role Limitation: Accomplish less	8	5.1	6	3.8	53	33.8
18. Role Limitation: Limited in endurance	10	6.4	6	3.8	53	33.8
19. Ocular Pain: Amount time: pain	8	5.1	1	0.6	73	46.5
20. Dependency: Stay home most of time	6	3.8	14	8.9	80	51.0
21. Mental Health: Amount true: frustrated	9	5.7	11	7.0	76	48.4
22. Mental Health: Amount true: no control	12	7.6	6	3.8	84	53.5
23. Dependency: Rely too much on other's word	12	7.6	4	2.5	92	58.6
24. Dependency: Need much help from others	10	6.4	6	3.8	89	56.7
25. Mental Health: Amount true: embarrassment	9	5.7	8	5.1	100	63.7