A
ADD Power
ADD power refers to the extra magnification needed for close-up vision. In reading glasses, this is the “+” strength that helps you see clearly up close. If you’re unsure what strength to choose, start with our reading glasses strength guide or browse our Everyday Reading Glasses.
Anti-Glare / Anti-Reflective (AR) Coating
Anti-glare coating reduces reflections on lenses, improving clarity and comfort—especially under bright lights or screens. This feature is available on many of our Custom Reading Glasses and is especially helpful for digital eye strain.
Astigmatism
Astigmatism causes blurred or distorted vision due to the eye’s shape. It’s corrected with prescription lenses using cylinder and axis values. Most over-the-counter reading glasses do not correct astigmatism.
Axis
Axis works with cylinder power to describe how astigmatism correction is oriented in prescription lenses. It applies only to prescription eyewear and is not relevant for standard reading glasses.
B
Base Curve
Base curve refers to the curvature of a lens. While most commonly discussed for contact lenses, lens curvature can also influence how certain frame styles sit and feel on your face.
Bifocal vs Progressive
Bifocals have two clearly defined viewing zones, while progressives blend multiple strengths gradually. If you prefer clarity without constant switching, explore our Dual-Strength Bifocal Reading Glasses.
Blue-Light Filtering
Blue-light filtering lenses reduce exposure from digital screens and may help ease eye fatigue during long workdays. Learn more in our digital eye strain guide.
Browline Glasses
Browline glasses feature a bold upper frame that adds structure and definition. This classic style is popular across both women’s reading glasses and men’s designs.
C
Cat-Eye Frames
Cat-eye frames feature upswept outer corners that create a lifted, flattering look. They’re a favorite among shoppers browsing our women’s reading glasses collection.
Computer Readers / Intermediate Vision
Computer readers support intermediate vision—distances like monitors and laptops. Many customers prefer dual-strength bifocals for seamless switching.
Cylinder (CYL)
Cylinder indicates the amount of correction needed for astigmatism in prescription lenses. OTC readers typically do not include cylinder correction.
D
Diopter (D)
A diopter measures lens strength. Higher numbers provide more magnification for close-up work. If standard strengths aren’t enough, explore our High Power Reading Glasses or Super High Power Readers.
Digital Eye Strain
Digital eye strain includes tired, dry, or achy eyes caused by prolonged screen use. Proper magnification and lens coatings can help—learn more in our eye strain resource.
Dual-Strength Bifocal
Dual-strength bifocals feature two distinct zones—one for distance and one for near—without blending. Learn how they work on our Dual-Strength Bifocal page.
F
Face Width
Face width determines how frames fit across your face. We group frames from Narrow to X-Wide to improve comfort. Browse our XL & Wide-Fit Reading Glasses for roomier options.
FSA / HSA Eligibility
Many DebSpecs glasses are FSA/HSA eligible. Learn how to use your benefits before they expire on our FSA & HSA Glasses page.
H
High-Power Readers
High-power readers (+4.00 to +10.00) offer stronger magnification than typical retail options. Explore our full High Power Reader collection.
Hyperopia (Farsightedness)
Hyperopia makes near tasks more difficult. Reading glasses often help by adding magnification, especially for shoppers experiencing early presbyopia.
I
Intermediate Vision
Intermediate vision covers distances between reading and far viewing, like computer screens. Many customers solve this with dual-strength bifocal reading glasses.
L
Lenticular Lens
Lenticular lenses reduce thickness and weight in strong prescriptions. This technology is essential in our Super High Power Reading Glasses.
M
Myopia (Nearsightedness)
Myopia causes distant objects to appear blurry while close-up vision remains clear. It differs from presbyopia, which creates the need for reading glasses.
N
Near Vision
Near vision is used for reading, crafting, and phone use. If close-up clarity is fading, our Everyday Reading Glasses are a great starting point.
O
Over-the-Counter (OTC) Readers
OTC readers are ready-made glasses available without a prescription. Browse our Everyday Readers for simple, affordable solutions.
P
Presbyopia
Presbyopia is the age-related loss of near focus, typically beginning in your 40s. Learn more in our presbyopia guide.
Pupillary Distance (PD)
PD is the distance between your pupils. Most OTC readers are designed to work comfortably across a wide PD range.
S
Single-Vision Readers
Single-vision readers use one magnification strength across the entire lens. Browse styles in our single-vision reading glasses collection.
Super High-Power Readers
Super high-power readers (+10.00 to +20.00) are designed for severe close-up vision needs. Explore options in our Super High Power Reader collection.
X
XL / Wide-Fit Readers
XL readers are designed for broader faces and improved comfort. See our full selection of XL & Wide-Fit Reading Glasses.
Ready to See the Difference?
Understanding your options makes all the difference. Whether you’re choosing your first pair or upgrading to something better, we’re here to make it simple, comfortable, and clear.
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