Equivalences for Visual Acuities


Snellen Equiv.	Meter Units (M System)	Metric	American Optical Jaeger (approx)	Approx Height (mm)	Usual Type Text Size
20/500	10.00	6/150	J19	15.00	1/2-in. letter
20/250	5.00	6/75	J18	7.50	Newspaper headlines
20/200	4.00	6/60	J17	6.00	Newspaper subheadlines
20/100	2.00	6/30	J11	3.00	Large-print material
20/80	1.60	6/24	J9	2.30	Children's books
20/60	1.20	6/18	J7	1.75	Magazine print
20/50	1.00	6/15	J6	1.50	Newspaper print
20/40	0.80	6/12	J4	1.15	Paperback print
20/25	0.50	6/7.5	J1	0.75	Footnotes
20/20	0.40	6/6	--	0.58	--

Last Updated on Monday, 08 March 2010 11:25