If you’re buying readers specifically for computer use, you might need a than what you use for printed books. Because monitors are usually further away (20+ inches) than a book (14 inches), a +1.25 might be better for the office even if you use a +1.75 for novels. Look for "Blue Light Blocking" coatings if you spend hours staring at a screen. 4. Check the Fit and Style
Over-the-counter readers are "one size fits all," meaning both lenses have the same strength. You should see an eye doctor for a prescription if: how to buy readers
Most retailers provide a printable diopter chart. Hold it about 14 inches away and see which line of text is the smallest you can read clearly. If you’re buying readers specifically for computer use,
The most important part of buying readers is the "strength," measured in diopters (e.g., +1.00, +1.50). Hold it about 14 inches away and see