Reading glasses are measured in . The higher the number, the stronger the magnification. While a professional eye exam is the best way to determine your needs, you can use these general age-based guidelines: Suggested Strength 40–44 +0.75 to +1.00 45–49 +1.00 to +1.50 50–54 +1.50 to +2.00 55–59 +2.00 to +2.25 60+ +2.25 to +3.00 Data compiled from SAV Eyewear and Online Opticians UK .
If you aren't sure, download and print a Diopter Strength Chart from Readers.com. Hold it 14 inches away and see which line you can read clearly without squinting. Cheap vs. Designer: Does Price Matter? buy cheap reading glasses
: Cheap off-the-shelf options have the same prescription in both eyes and cannot correct for astigmatism . They may also use lower-quality plastics that are prone to breaking. Reading glasses are measured in