En español | Who needs reading glasses? All of us do, eventually, thanks to a condition called presbyopia — a gradual loss of the ability to clearly see things up close — that becomes noticeable for most people beginning in their 40s.
Because presbyopia is caused by age-related changes to the lens of the eye, it isn't preventable or reversible. But experts say that the right pair of reading glasses, including those readily available at retailers like a dollar store or pharmacy, can help bring small print and other objects, like your smartphone screen, back into focus.
Here's how to find your perfect pair.
Over-the-counter reading glasses
"Reading glasses from a drugstore are in fact perfectly safe,” says ophthalmologist Michelle Andreoli, M.D., a clinical spokesperson for the American Academy of Ophthalmology, who notes that over-the-counter reading glasses, including low-cost dollar store options, can help you focus up close and will not damage your eyesight. But, she adds, once your up-close vision starts changing, you can expect it to continue to worsen into your mid-60s.
That means the reading-glass strength you start out with will need to increase as the years go by. “A good rule of thumb is that any strength of [reading glasses] will last someone between 45 and 65 about two years,” Andreoli says.
Experts say the best way to determine what strength you need in the first place is with a yearly eye exam, which can tell you what power (notated with a number like +1.00 or +2.50) you need. The higher the number is, the stronger the glasses are.
If you haven't been to the eye doctor or want a way to double-check in the store, Andreoli recommends grabbing a greeting card from the stationery aisle to carry out a DIY test: Hold the card at a comfortable reading distance and try on several pairs until you find the ones that work best.
If you're stuck between two pairs? “In most cases, when two reading-glass powers seem equally suitable, choose the glasses with the lower power,” says optometrist William Reynolds, president of the American Optometric Association. “Picking reading glasses that are too strong typically will cause more discomfort problems than reading glasses that are a little too weak."
Another thing to keep in mind is the activity you'll be using the reading glasses for. Working on the computer, for example, typically takes place at a greater distance than reading a book, and thus requires a lower strength.
Prescription reading glasses
The over-the-counter route isn't right for everyone, Reynolds says, including people who have astigmatism (meaning the eye's cornea or lens isn't perfectly round) and those who need a different strength for each eye. In those cases, prescription reading glasses from the eye doctor are a better option.
The most popular choice of prescription reading glasses are progressive lenses, Reynolds says. They combine multiple prescriptions in one lens, with a gradual top-to-bottom change, allowing someone to wear just one pair of glasses to correct far-away, middle-distance and up-close vision.
For people who otherwise have no vision problems, Andreoli says that reading-glass lenses that are clear (nonprescription) on top are another popular option available from the eye doctor. They can be worn continuously and eliminate the need to take your reading glasses on and off throughout the day.
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Fredric Grethel, a board member of The Vision Council, a nonprofit optical industry trade association, notes that prescription reading glasses might also be a better choice for someone who wants more options, such as blue-light blocking lenses or an antireflective coating — not to mention a greater selection of fashionable frame choices.
"The world has really changed from some years ago,” Grethel says of the numerous reading-glass options — both over-the-counter and prescription — available today. “Now they're fashionable, they're fun, and they can give you personality.”
What’s Your Power?
Reading glasses come in a range of powers, depending on the strength that you need.
+1.25 to +1.50
+1.50 to +1.75
+1.75 to +2.00
+2.00 to +2.25
+2.25 to +2.50
+2.50 to +3.00