So sánh phương pháp

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