Vertaile menetelmiä

	Näkövamman vaikutus -asteikko	Visuaalisen toiminnan indeksi VF-14
Tieteenala	Silmätautioppi	Silmätautioppi
Menetelmäperhe	Process / pipeline	Process / pipeline
Syntyvuosi	2000	1994
Kehittäjä	Wolffsohn JS, Cochrane AL et al.	Steinberg EP, Tielsch JM et al.
Tyyppi	Self-report	Self-report
Alkuperäislähde	Wolffsohn, J. S., & Cochrane, A. L. (2000). Design of the low vision quality-of-life questionnaire (LVQOL) and measurment of its item and scale validity and reliability. Optometry & Vision Science, 77(3), 144-152.	Steinberg, E. P., Tielsch, J. M., Schein, O. D., et al. (1994). The VF-14. An index of functional impairment in patients with cataract. Arch Ophthalmol, 112(5), 630-638.
Rinnakkaisnimet	IVI, Impact Vision Impairment	VF-14, Visual Function-14
Liittyvät	4	4
Tiivistelmä	The Impact of Vision Impairment (IVI) scale is a quality-of-life instrument designed specifically for patients with significant vision loss (low vision) to measure the psychological, functional, and social burden of visual impairment. Developed by Wolffsohn, Cochrane, and colleagues (2000), the IVI captures domains including emotional impact (distress, frustration), functional limitations (mobility, ADLs), social participation, and role fulfillment in populations with moderate to severe vision loss where generic or mild-vision-focused instruments are insensitive.	The VF-14 is a 14-item, disease-specific functional status questionnaire developed to measure visual disability from cataract and its response to cataract surgery. Created by Steinberg, Tielsch, and colleagues (1994), the VF-14 focuses on difficulty with 14 common daily activities (e.g., reading small print, driving day/night, recognizing faces) and is used primarily to assess cataract severity, prioritize surgery, and document post-operative improvement in functional vision.