So sánh phương pháp

	Chỉ số Chức năng Thị giác VF-14	Thang đo Tác động của Suy giảm Thị lực
Lĩnh vực	Nhãn khoa	Nhãn khoa
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1994	2000
Người khởi xướng	Steinberg EP, Tielsch JM et al.	Wolffsohn JS, Cochrane AL et al.
Loại	Self-report	Self-report
Công trình gốc	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.
Tên gọi khác	VF-14, Visual Function-14	IVI, Impact Vision Impairment
Liên quan	4	4
Tóm tắt	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.