Print this page on your printer. You cannot use this chart by looking at it on your computer monitor due to the size and resolution differences among computers.
The chart below is exactly 5 inches wide. Please make sure it is 5 inches wide on your printed copy.
To find the strength you need, read the following Test Chart WITHOUT GLASSES from a distance of about 14 inches. The first line you have difficulty reading has the lens strength to the right. This is the correct optical power to order.
For any questions or concerns, please email email@example.com or call 1-844-484-4667 ThinOptics, Inc., 1620 Carneros Meadows Lane, Sonoma, CA 95476