How to Tell What Strength of Reading Glasses You Need
- 1). Print the chart located in the References section of this article. The chart should be printed in black ink on white paper.
- 2). Hold the piece of paper with the chart on it 14 inches from your face. It is important to be as close to 14 inches as possible to get an accurate measurement.
- 3). Remove your reading glasses if you have a pair on. Start at the bottom of the chart and read each line of print, going up until you reach a line you no longer can read.
- 4). Locate the diopter number beside the line you cannot read. This is the suggested strength you will need for your reading glasses.