REFERENCES
- Massof R W, Rubin G S. Visual function assessment questionnaires. Surv Ophthalmol 2001; 45: 531–48
- Vitale S, Schein O D. Qualitative research in functional vision. Int Ophthalmol Clin 2003; 43: 17–30
- de Boer M R, Moll A C, de Vet H CW, Terwee C B, Volker-Dieben H JM, van Rens G HMB. Psychometric properties of vision-related quality of life questionnaires: A systematic review. Ophthal Physiol Opt 2004; 24: 257–273
- Guttman L. A basis for scaling quantitative data. Am Sociol Rev 1944; 9: 139–150
- The basis for scalogram analysis. Measurement and Prediction, S A Stouffer. Wiley, New York 1950; 60–90
- Wright B D, Stone M H. Making Measurements. Phaneron Press, Chicago 2004; 5–14
- Massof R W. Likert and Guttman scaling of visual function rating scale questionnaires. Ophthalmic Epidemiol 2004; 11: 381–99
- Bond T G, Fox C M. Applying the Rasch Model. Earlbaum, Mahwah, NJ 2001; 177–179
- Anderson E B. A goodness of fit test for the Rasch model. Psychometrika 1973; 38: 123–140
- Karabatsos G. A critique of Rasch residual fit statistics. J Appl Meas 2000; 1: 152–176
- Andrich D. A rating formulation for ordered response categories. Psychometrika 1978; 43: 561–573
- Mangione C M, Phillips R S, Seddon J M, Lawrence M G, Cook E F, Dailey R, Goldman L. Development of ‘Activities of Daily Vision Scale’. A measure of visual functional status. Med Care 1992; 30: 1111–26
- Mangione C M, Lee P P, Gutierrez P R, Spritzer K, Berry S, Hays R D. National Eye Institute Visual Function Questionnaire Field Test Investigators. Development of the 25-item National Eye Institute Visual Function Questionnaire. Arch Ophthalmol 2001; 119: 1050–8
- Sloane M E, Ball K, Owsley C, Bruni J R, Roenker D L. The visual activities questionnaire: developing an instrument for assessing problems in everyday visual tasks. Noninvasive Assessment of the Visual System. OSA Tech Dig Vol. 1. Optical Society of America, Washington, DC 1992; 26–29
- Steinberg E P, Tielsch J M, Schein O D, Javitt J C, Sharkey P, Cassard S D, Legro M W, Diener-West M, Bass E B, Damiano A M, et al. The VF-14. An index of functional impairment in patients with cataract. Arch Ophthalmol 1994; 112: 630–8
- Ware J E, Jr., Sherbourne C D. The MOS 36-item short-form health survey (SF-36). I. Conceptual framework and item selection. Med Care 1993; 31: 247–263
- Bergner M, Bobbitt R A, Carter W B, Gilson B S. The Sickness Impact Profile: development and final revision of a health status measure. Med Care 1981; 19: 787–805
- Chang C H, Wright B D, Cella D, Hays R D. The SF-36 physical and mental health factors were confirmed in cancer and HIV/AIDS patients. J Clin Epidemiol 2007; 60: 68–72