Eyewear Guides
43 guides on lenses, frames, fit, prescriptions, and care -- written to help you buy and wear glasses with more confidence.
Lens Basics & TypesCoatings & Lens Add-onsLens Replacement & Smart GlassesFit & SizingFrame Materials & StyleBuying Guides & BudgetEye Health & PrescriptionsMoney & InsuranceCare & Maintenance
Lens Basics & Types
6 guides
Start here if you're not sure what kind of lens you actually need.
Understanding Lens Types: Materials, Coatings & Special Lenses
Materials, coatings, and special lens options explained in one place, with a link to the full guide for each.
High-Index Lenses Explained
If your prescription is strong, high-index lenses trade lens thickness and weight for a small cost increase -- here's how to tell if you need them.
Lens Materials Guide - Polycarbonate vs Trivex vs Plastic
The material your lens is made from affects weight, impact resistance, clarity, and price -- here is the real difference.
Single Vision vs Bifocal vs Progressive Lenses
Three ways to correct your vision at one or more distances -- here is how your prescription determines which one you need.
Reading Glasses vs Prescription Glasses vs Progressives
Drugstore readers work for some people and not others -- here's how to know which category you actually fall into.
Polarized vs Photochromic vs Tinted Lenses
All three darken your lenses, but they solve different problems. Here is how to pick the right one.
Coatings & Lens Add-ons
7 guides
Extra treatments that change how your lenses look and feel day to day.
Blue Light Blocking Lenses - Do They Really Work?
Blue light blocking lenses are one of the most popular lens upgrades we sell -- and one of the most debated. Here is an honest, no-hype look at what the research actually says.
Anti-Reflective Coating - What It Is and Is It Worth It
A thin coating that cuts glare, reduces halos at night, and makes your eyes visible behind your lenses instead of hidden by reflections.
Scratch-Resistant Coating - What It Actually Protects
No lens coating makes glasses scratch-proof -- here's what scratch-resistant coating really does, and how to keep your lenses looking new longer.
UV Protection in Eyeglass Lenses
Sunglasses are not the only lenses that need UV protection -- here is why, and how to know if your everyday glasses already have it.
Computer Glasses vs Blue Light Glasses
They get used as synonyms, but 'computer glasses' and 'blue light glasses' are not always the same product.
Digital Eye Strain: Symptoms and How Lenses Help
Also called computer vision syndrome -- here's what actually causes it, and what genuinely helps versus what's overhyped.
Do Cheap Lenses Cause Headaches or Blurry Vision?
Low price and low quality aren't the same thing -- here's what actually causes lens-related discomfort.
Lens Replacement & Smart Glasses
3 guides
Keep your current frames and just swap the lenses.
Lens Replacement - When to Replace Lenses Instead of Buying New Frames
If your frames still fit and look great, replacing just the lenses is usually faster and cheaper than starting over.
Smart Glasses Lens Replacement - Meta Ray-Ban & More
Add your real prescription to the smart glasses you already own -- cameras, speakers, and touch controls stay exactly as they are.
How Shade Gray's Home Try-On Program Works
Try frames on your own face, in your own light, before committing to a prescription order. Please note: Home Try-On is not a free program.
Fit & Sizing
7 guides
Getting the fit right so your glasses stay comfortable and don't slide.
Best Glasses for Wide Faces
Most eyewear brands stop at 'medium.' Shade Gray was built around Wide and Extrawide sizing from the start.
How to Find Glasses for Your Face Shape
The general rule: choose a frame shape that contrasts with your face shape, not one that copies it.
Nose Bridge Types and How They Affect Fit
If glasses slide down your nose or pinch at the sides, the nose bridge style -- not the frame size -- is usually the real issue.
Why Do My Glasses Keep Sliding Down? (And How to Fix It)
Almost always a fixable fit issue -- here are the most common causes and the simplest fixes, in order of likelihood.
How to Measure a Child's PD and Frame Size
Kids can't always sit still for measurements the way adults can -- here's how to get it right anyway.
How to Adjust Your Glasses at Home
Simple, low-risk adjustments you can make yourself, and the ones better left to gentle heat or a professional.
Tightening Loose Screws and Replacing Nose Pads at Home
Two of the most common small repairs -- both doable in a few minutes with an inexpensive kit.
Frame Materials & Style
5 guides
What frames are made of, and picking a look that fits your life.
Frame Material Guide - Acetate vs Metal vs TR90
A companion to our full materials guide, focused on the three most common frame materials you'll see while shopping.
Glasses for Work vs Weekend Wear
Many people now own more than one pair -- here's how to think about matching frames to different parts of your life.
Glasses Trends 2026
From bold acetate to ultra-thin metal, here's what's actually popular in eyewear this year.
How to Wear Sunglasses with Glasses
If you wear prescription glasses, here are your real options for sun protection -- beyond just squinting.
Shade Gray vs Other Online Eyewear Retailers
An honest look at where Shade Gray fits among online glasses retailers -- and where our focus is different.
Buying Guides & Budget
4 guides
Straightforward advice on price, quality, and where to buy.
How to Buy Prescription Glasses Online: Step-by-Step
From prescription to doorstep, here is exactly what the process looks like.
Best Cheap Prescription Glasses Online in 2026
What to actually look for when 'cheap' glasses need to still be good glasses -- lens quality, real sizing, and return policies included.
Best Glasses Under $50
A full pair of prescription glasses for less than the cost of a single lens at some traditional retailers -- here's what's actually included at that price.
A Parent's Guide to Kids' First Pair of Glasses
From the first exam to getting them to actually wear the glasses -- what to expect and how to make it easier.
Eye Health & Prescriptions
6 guides
Understanding your prescription and how often to update it.
Understanding Astigmatism and How It Affects Your Lenses
Astigmatism is extremely common and easy to correct -- here is what it actually is, and what the numbers on your prescription mean.
Best Glasses for Astigmatism
Any well-made single vision or progressive lens corrects astigmatism -- the frame choice comes down to comfort and lens thickness, not the correction itself.
How Often Should You Get an Eye Exam?
Eye exams do more than update your prescription -- they catch health issues early, often before symptoms appear.
How Often Should You Update Your Eyeglass Prescription?
Wearing an outdated prescription is more common than you'd think -- here is how often to check, and the signs it's time sooner.
Prescription Glossary - Sphere, Cylinder, Axis, Add
Sphere, cylinder, axis, add, PD -- a full glossary of every value that can appear on an eyeglass prescription.
Why New Glasses Sometimes Feel Off at First
Dizziness, a warped floor, or eye strain in your first day with new glasses is common -- and usually temporary. Here is when to wait it out, and when to call your doctor.
Money & Insurance
2 guides
Using insurance, FSA/HSA, and tax rules to pay less.
Are Prescription Glasses Tax Deductible?
In some cases, yes -- though FSA/HSA is usually the simpler way to get the tax benefit. Here's the general picture.
How to Use Vision Insurance Benefits When Buying Glasses Online
Most vision plans work differently online than in a physical optical store -- here's how to actually apply your benefits.
Care & Maintenance
3 guides
Simple upkeep so your glasses last longer.
How to Clean Your Glasses the Right Way
The wrong cleaning habits are one of the top causes of avoidable lens damage. Here's the method that actually protects your coatings.
How to Store Glasses to Prevent Damage
Most avoidable glasses damage happens off your face, not on it. A few storage habits prevent most of it.
How to Fix Scratched Lenses (or When to Replace Instead)
Light scratches can sometimes be minimized. Deep or central scratches almost always need new lenses -- here's how to tell which you have.