Linganisha mbinu

	Kielelezo cha Kazi ya Kuona VF-14	Kiwango cha Tathmini ya Athari za Ulemavu wa Kuona
Nyanja	Oftalmolojia	Oftalmolojia
Familia	Process / pipeline	Process / pipeline
Mwaka wa asili	1994	2000
Mwanzilishi	Steinberg EP, Tielsch JM et al.	Wolffsohn JS, Cochrane AL et al.
Aina	Self-report	Self-report
Chanzo asilia	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.
Majina mbadala	VF-14, Visual Function-14	IVI, Impact Vision Impairment
Zinazohusiana	4	4
Muhtasari	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.