השוואת שיטות

	מדד התפקוד הראייתי VF-14	סולם השפעת ליקוי הראייה (Impact of Vision Impairment Scale)
תחום	רפואת עיניים	רפואת עיניים
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1994	2000
הוגה השיטה	Steinberg EP, Tielsch JM et al.	Wolffsohn JS, Cochrane AL et al.
סוג	Self-report	Self-report
מקור מכונן	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.	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.
כינויים	VF-14, Visual Function-14	IVI, Impact Vision Impairment
קשורות	4	4
תקציר	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.	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.