How to Choose the Right Power
Reading Glasses Buying Guide: How to Choose the Right Power
Finding the right reading glasses starts with one question: What power do you need?
Reading glasses are available in a wide range of strengths, from low powers such as +0.50 and +0.75 to extra-high powers of +4.00 and above. The right choice depends on your vision, the distance at which you want to see clearly, and how you plan to use your glasses.
This guide will help you understand reading-glasses power, compare different types of readers, and choose a pair that fits your everyday needs.
What Does Reading Glasses Power Mean?
Reading-glasses strength is usually shown as a positive number such as:
+0.50 +1.00 +1.50 +2.00 +2.50 +3.00 +4.00
This number describes the focusing power of the lens in diopters.
In general:
- A lower number provides less near-focus assistance.
- A higher number provides stronger near-focus assistance.
- Stronger is not automatically better.
- The goal is to use the lowest power that gives you clear, comfortable vision at the distance where you normally read or work.
If you already own reading glasses that work well, your current power is usually the best starting point when shopping for another pair.
Shop Reading Glasses by Power
Low Power: +0.50 to +1.00
Low-power reading glasses provide a small amount of near-vision assistance.
They may be useful for people who need only a slight boost for close-up tasks or who have difficulty finding strengths below the more common +1.00 range.
Shop Low Power Reading Glasses
Standard Reading Powers: +1.00 to +3.50
These are the powers most commonly associated with over-the-counter reading glasses.
Eye Needs offers a variety of men's, women's, unisex, fashion, bifocal, computer and specialty reading glasses throughout this range.
High Power: +4.00 and Above
If standard reading-glasses strengths no longer provide enough near magnification, higher powers are available.
Eye Needs specializes in hard-to-find high-power readers, including strengths beyond +4.00.
Higher-powered lenses generally have a closer working distance, so the object you are viewing may need to be held closer to your eyes to come into focus.
Shop High Power Reading Glasses
If you require unusually strong magnification or have a diagnosed low-vision condition, talk with your eye-care professional about the type of magnification that is appropriate for you.
How Do I Know Which Power to Choose?
If You Already Wear Reading Glasses
Check the power printed on your current pair.
You may see a marking such as:
+1.50 or +2.50
If your current glasses are comfortable and clear at your normal reading distance, start with that same power.
If your vision has noticeably changed, an eye exam is a better way to determine why than simply continuing to increase the strength.
If You Are New to Reading Glasses
Start by thinking about where you want things to come into focus.
Try reading normal-size text at the distance where you naturally hold a:
- Book
- Restaurant menu
- Phone
- Tablet
- Newspaper
- Craft or hobby project
The right reading power should make the object clear without forcing you to bring it uncomfortably close or push it unusually far away.
Choose the lowest strength that gives you comfortable, clear near vision.
Why Working Distance Matters
Power and working distance are closely related.
As reading-glasses power increases, the clearest focusing distance generally becomes closer.
For example, someone using readers for a computer monitor may prefer a different strength than someone examining very fine detail only inches away.
That means the strongest pair you can see through is not necessarily the best pair for what you are doing.
Reading
For books, menus, mail and phones, choose a power that feels comfortable at your normal reading distance.
Computer Work
A desktop computer is usually farther away than a book or phone. Some people therefore use a lower power for computer work than they use for close reading.
Crafts and Detailed Work
Sewing, model building, jewelry work and other detailed hobbies may involve a much closer working distance. A stronger power may be useful when the task requires extra magnification.
Don't Choose Reading Glasses by Age Alone
You may see charts online that recommend a specific reading-glasses power based entirely on age.
Age can explain why near vision changes, but it does not tell you the exact strength you personally need.
Your existing prescription, working distance, differences between your eyes, astigmatism and other vision factors can all affect what feels clear and comfortable.
Use your actual vision and intended task—not just your age—to guide your selection.
When Over-the-Counter Readers May Not Be Enough
Ready-made reading glasses typically provide the same basic power for both eyes.
They do not replace a customized prescription when your eyes have different needs or when other vision corrections are necessary.
Consider seeing an eye-care professional if you:
- Cannot find a reader strength that gives you comfortable vision
- See significantly better through one eye than the other
- Have frequent headaches or eye strain while reading
- Have persistent blurry or double vision
- Notice a significant or sudden change in your vision
- Have been diagnosed with an eye condition
- Need correction for astigmatism or other refractive errors
- Have not had an eye exam recently
Reading glasses can help with near focusing, but they do not diagnose or treat eye disease.
High Power Readers and Low Vision
High-powered lenses can provide additional magnification for close-up activities, and magnification devices are sometimes used by people with low vision.
However, conditions such as macular degeneration, diabetic retinopathy and other eye diseases require professional evaluation. High-power reading glasses do not treat or correct the underlying disease.
If you have low vision, an eye doctor or low-vision specialist can help determine which type of magnification or visual aid is appropriate.
Full-Frame, Half-Frame or Bifocal?
Power is only part of choosing the right reading glasses.
Full-Frame Reading Glasses
The entire lens contains your reading power.
These are a good choice when you primarily want the glasses for close-up viewing.
Half-Frame Readers
Half-frame styles sit lower on the nose, allowing you to look down through the reading lenses and over the top for distance.
They can be convenient when frequently switching between close-up and distance viewing.
Bifocal Reading Glasses
Bifocal readers have a magnified reading section within the lens while the upper portion is designed for another viewing distance, depending on the product.
They can be useful when you don't want to constantly put your readers on and take them off.
Reading Sunglasses
Reading sunglasses combine sun protection with near-vision assistance.
Depending on the style, the entire lens may contain reading power or the magnification may be limited to a bifocal area.
They are useful for activities such as:
- Reading outdoors
- Checking your phone
- Reading menus on a patio
- Gardening
- Relaxing at the beach or pool
Always check the individual product description to understand how the magnification is positioned in the lens.
Computer and Blue-Light Reading Glasses
Computer glasses and blue-light-filtering readers are designed for screen-heavy environments.
When choosing a power for computer use, remember that a computer monitor typically sits farther from your eyes than a book or phone.
The power you prefer for close reading may therefore feel too strong at your normal computer distance.
Choosing the Right Frame
Once you know your power, consider how and where you will wear your glasses.
Lightweight Frames
Good for longer periods of reading and everyday use.
Spring Hinges
Provide additional flexibility at the temples and may improve comfort for different head widths.
Neck-Hanging Readers
Designed to hang around the neck when removed, making them convenient for people who frequently put their readers on and take them off.
Compact or Folding Readers
Useful as travel, purse, pocket or backup glasses.
Fashion Frames
Reading glasses don't have to look clinical. Choose a shape, material and color you enjoy wearing.
Consider Buying More Than One Pair
Reading glasses have a habit of being somewhere other than where you need them.
Many customers keep separate pairs:
- At home
- At work
- In the kitchen
- At a desk
- In a purse or bag
- In a workshop or craft room
- As a backup pair
If you use different working distances, you may also prefer different powers for different activities.
Frequently Asked Questions
Is a higher reading-glasses number stronger?
Yes. +3.00 provides more focusing power for near vision than +1.50. Higher strength, however, does not mean better vision unless that strength matches your needs.
Should I choose the strongest power that makes the text bigger?
No. Choose the lowest power that gives you comfortable, clear vision at your intended viewing distance.
Can I use reading glasses all day?
Standard full-power readers are designed primarily for near work. Looking through them at distances they were not intended for may appear blurry.
Can I drive while wearing reading glasses?
Standard reading glasses are intended for near vision and should not be used as driving glasses unless an eye-care professional has prescribed eyewear specifically for that purpose.
Why do stronger readers make me hold things closer?
Increasing lens power generally reduces the working distance at which objects come into clear focus.
Are +4.00 and higher reading glasses available?
Yes. Eye Needs specializes in hard-to-find strengths and carries high-power reading glasses beginning around +4.00, with selected styles available in considerably higher magnifications.
Are +0.50 and +0.75 readers available?
Yes. Eye Needs carries hard-to-find low-power readers in strengths including +0.50 and +0.75.
What if the two eyes need different powers?
Ready-made readers usually use the same power in both lenses. If your eyes require significantly different corrections, prescription eyewear may be more appropriate.
Still Not Sure Which Power to Choose?
If you already have a pair of reading glasses that works well, start with the power you currently use.
If you're unsure about a product or need help finding an Eye Needs style available in your power, we're happy to help.
Call Eye Needs: 609-731-4281
For new vision problems, significant changes in vision, or questions about your eye health, consult an eye-care professional.
Find Your Reading Glasses
Hard-to-find +0.50, +0.75 and +1.00 strengths.
Fashion, classic and specialty styles in a wide range of powers.
Everyday, lightweight, classic and specialty readers.
Shop High Power Reading Glasses
Hard-to-find stronger reading glasses beginning at +4.00.