Reading Glasses: How to Choose the Right Pair

Reading glasses are one of the most commonly purchased eyewear products in the world. Whether you've picked up a cheap pair from the drugstore or you're considering prescription readers for the first time, understanding what actually matters — and what doesn't — can save you money and protect your eye health.

This guide covers everything from choosing the right strength to understanding when over-the-counter readers stop being enough and prescription glasses become the better option.

Why Do You Need Reading Glasses?

The underlying cause is a condition called presbyopia — the gradual hardening of the eye's natural lens that makes it harder to focus on close objects. It affects virtually everyone, typically becoming noticeable between ages 40-45.

Presbyopia isn't a disease. It's a natural part of aging, like gray hair. The crystalline lens inside your eye loses elasticity over time, which reduces its ability to change shape and focus on nearby objects. The first signs are usually:

• Holding your phone or book farther away to see the text clearly
• Needing brighter light to read comfortably
• Eye strain or headaches after close-up work
• Difficulty reading small print (restaurant menus, medication labels)

If any of this sounds familiar, it's time for an eye exam to check your near vision and determine whether you need reading correction.

How to Choose the Right Strength

Reading glasses are measured in diopters, expressed as a plus power (+1.00, +1.50, +2.00, etc.). Higher numbers mean more magnification. Here's a general age-based guideline:

Over-the-Counter vs. Prescription Reading Glasses

This is the most important decision you'll make about reading glasses. Here's an honest comparison:

Over-the-Counter (OTC) Readers

OTC readers — the pre-made glasses you find at pharmacies, dollar stores, and grocery checkouts — are convenient and cheap. They're perfectly acceptable for occasional, short-duration tasks like glancing at a price tag or reading a menu.

However, they have significant limitations:

• Same power in both eyes. Most people have slightly different prescriptions in each eye. OTC readers can't account for this, which may cause one eye to work harder than the other.
• No astigmatism correction. Astigmatism affects roughly 1 in 3 Canadians, and uncorrected astigmatism causes blurry, distorted vision that magnification alone won't fix.
• Fixed optical centres. The optical centre of OTC lenses is set for an "average" pupillary distance. If your eyes are wider or narrower than average, you'll experience prismatic effects that cause eye strain.
• Lower lens quality. Budget readers often lack anti-reflective coating, UV protection, and scratch resistance.

Prescription Readers

Prescription reading glasses are custom-made for your eyes. They account for the specific power each eye needs, correct for astigmatism if present, and are centred precisely to your pupillary distance. The result is sharper, more comfortable vision — especially during extended reading or screen work.

Prescription readers don't have to be expensive. Many optical shops offer very affordable options — for example, Charm Optical in Edmonton offers complete glasses starting at $65, which includes the frame and single-vision lenses. You can also find budget-friendly frames in their online collection and bring them in for a fitting.

Reading Glasses for Screen Work

This is a common misconception: many people try to use their reading glasses for computer work and end up with neck and back pain. The reason is focal distance.

Standard reading glasses are optimized for about 35-40cm (14-16 inches) — the distance you hold a book or phone. Your computer screen is typically 50-65cm (20-26 inches) away. Using reading glasses at a computer forces you to lean forward to get the screen into the focal sweet spot, which is terrible for your posture.

If you spend significant time at a computer, consider these alternatives:

• Computer glasses — Single-vision lenses with an intermediate prescription, optimized for screen distance. Less magnification than readers, but perfect for the 50-65cm range.
• Progressive lenses — Multifocal lenses that cover distance, intermediate, and near in one lens. More versatile but more expensive. Read our complete guide to progressive lenses for details.
• Blue light coating — Regardless of which lens type you choose, adding blue light filtering can reduce glare and may help with screen comfort during long work sessions.

When to Upgrade from Readers to Progressives

Reading glasses work well when near vision is your only problem. But there are clear signs that it's time to upgrade:

• Constant on/off. If you're putting readers on and taking them off dozens of times a day — to check your phone, then look up, then read a document — progressives eliminate this hassle.
• Distance vision changes. If you're also starting to notice blurry distance vision (while driving or watching TV), you may need correction at both ends. Progressives handle both.
• The "arm's length" problem. Your computer, car dashboard, and grocery store shelves are all at intermediate distance — too far for readers, too close for distance glasses. Progressives cover this gap.
• Increasing reading power. Once your reading prescription reaches +2.00 or higher, the difference between your distance and near vision is significant enough that switching between separate glasses becomes impractical.

Your optometrist can evaluate whether progressives would improve your quality of life during a routine eye exam. Don't wait until you're frustrated — the earlier you try progressives, the easier the adaptation period tends to be.

Choosing Frames for Reading Glasses

Since reading glasses are worn for close-up tasks, comfort and lens size are the priority. Here's what to consider:

Frame Size and Lens Width

For reading-only glasses, you want lenses wide enough to give a comfortable field of view for books, screens, and documents. Avoid very small "fashion" frames — they'll force you to tilt your head constantly to keep text in the viewing area.

Weight

If you wear readers for extended periods (an hour or more at a time), lightweight frames are worth the investment. Titanium and memory metal frames from brands like Michael Kors or Ray-Ban tend to be comfortable for long wear. The frame fit guide from Charm Optical covers more details on finding the right size and style.

Nose Pads

Adjustable silicone nose pads allow you to position the glasses precisely. This matters because reading glasses need to sit slightly lower on your nose so you can look over them for distance vision without removing them.

Reading Glasses and Insurance Coverage

In Canada, prescription reading glasses are covered under most vision insurance plans. OTC readers are not covered because they don't require a prescription.

Typical coverage:

• Alberta Blue Cross — Covers frames and lenses under optical benefit, usually $200-$400 per benefit period
• Canada Life — Vision care benefit covers prescription eyewear, amount varies by plan
• Most employer-sponsored plans cover single-vision reading glasses every 12-24 months

Check your insurance provider's optical coverage before purchasing — even a basic plan often covers enough to get prescription readers at little or no out-of-pocket cost.

Caring for Your Reading Glasses

A few simple habits will keep your readers in good shape:

• Clean with lens cleaner and a microfiber cloth. Paper towels and shirt fabric scratch coatings over time.
• Store in a case. Tossing readers into a purse or pocket without a case is the fastest way to scratch lenses and bend frames.
• Don't push them up on your head. This stretches the temples and loosens the fit. Use a case or a neck cord instead.
• Get regular adjustments. If your frames feel loose or crooked, most optical shops will adjust them at no charge. Stores like Charm Optical offer free adjustments even if you didn't buy the glasses there.

The Bottom Line

Reading glasses are a simple, effective solution for presbyopia — and there's nothing wrong with starting with a drugstore pair to confirm that you need magnification. But for daily use, prescription readers deliver a meaningfully better experience: sharper vision, less eye strain, proper astigmatism correction, and better lens quality.

The best first step is always a comprehensive eye exam. Not just because it determines your reading prescription, but because it also screens for conditions like glaucoma and cataracts — both of which become more common at the same age presbyopia sets in. A $65 pair of prescription readers is a small investment in clear, comfortable vision. Start there.