Table 3. Results of the principal axis factoring.

	Factor loadings
Item	Factor 1	Factor 2	Factor 3
Item 2. Unclear vision	.778	-.064	-.035
Item 3. Trouble focusing	.642	.022	.081
Item 9. Trouble seeing at reduced contrast	.622	-.018	.010
Item 20. Trouble reading	.612	.001	-.173
Item 17. More time needed	.564	.067	.094
Item 11. More light needed	.505	.043	-.036
Item 12. Difficulty adjusting to light or dark	.442	-.044	.167
Item 10. Blinded by bright light	.420	.056	.205
Item 18. Vision problems in traffic	.371	.199	.067
Item 19. Trouble looking for objects	.369	.160	.035
Item 5. Problems with depth perception or estimating distances	.301	.168	.135
Item 14. Altered perception of objects or faces	.114	.556	-.065
Item 13. Seeing things that others do not	-.055	.536	.070
Item 6. Seeing shaky, jerky or shifting images	-.031	.521	.143
Item 4. Double vision	.011	.495	-.020
Item 7. Missing part(s) of the visual field	.110	.472	-.081
Item 8. Altered color experience	-.009	.471	-.021
Item 16. Dry eyes	.092	-.040	.608
Item 15. Painful eyes	.009	.099	.557
Eigenvalue	5.44	1.45	1.29
Explained variance	28.61%	7.66%	6.78%

Factor loadings in bold represent items’ highest factor loadings