مقایسهٔ روش‌ها

	شاخص عملکرد بینایی VF-14	مقیاس تأثیر اختلال بینایی (Impact of Vision Impairment Scale)
حوزه	چشم‌پزشکی	چشم‌پزشکی
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1994	2000
پدیدآور	Steinberg EP, Tielsch JM et al.	Wolffsohn JS, Cochrane AL et al.
نوع	Self-report	Self-report
منبع بنیادین	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.
نام‌های دیگر	VF-14, Visual Function-14	IVI, Impact Vision Impairment
مرتبط	4	4
خلاصه	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.