Look through the lenses at a flat surface (like the floor). If the lines look wavy or distorted, the lens quality is poor. When to See an Eye Doctor
Since you’ll be taking these on and off constantly, look for: how to buy reading glasses over the counter
If you need them for a monitor that sits further away than a book, you usually need a lower strength (e.g., if you use +2.00 for books, try +1.50 for the computer). Look through the lenses at a flat surface (like the floor)
The numbers on the corner of the lenses (like +1.00, +1.50, or +2.00) indicate the . The higher the number, the stronger the magnification. The numbers on the corner of the lenses (like +1
Since they’re affordable, buy a few pairs! Keep one in the kitchen, one by the bed, and one in the car so you're never caught squinting.
Don't just trust the chart. Pick up a pair and try to read something you brought with you—a pill bottle, your phone, or a paperback.
If the text is clear but you have to hold it too close to your face, the power is .