Lenses

The Snellen Eye Chart: A Quick History

What Are Toric Contact Lenses?

Can I Wear Just One Contact Lens?

Are Prescription Sunglasses Worth It? The Pros & Cons

What's an Abbe Number?

What Is the Axis in Your Glasses Prescription?

What Are Adjustable Focus Eyeglasses?

Why Eyeglass Lenses Crack and How to Avoid It

Do I Need Reading Glasses? Here Are the Signs

Concave vs. Convex Lens: What's the Difference?

Exploring the Pros & Cons of Mirrored Sunglasses

10 Tips for Switching from Glasses to Contacts & Vice Versa

What is a Diopter?

Why Are My Glasses Lenses so Thick?

Polarized vs. Non-Polarized Sunglasses: What’s The Difference?

Why Are My Glasses Lenses Turning Yellow?

What Are Trifocal Lenses?

Can Astigmatism Be Fixed with Glasses?

What Are Night Driving Glasses?

How Are Eyeglass Lens' Edges Polished?

How Do Eyeglasses Work?

Spheric vs. Aspheric Lenses: What’s The Difference?

What Are Bifocals & Do You Need Them?

Trivex vs. Polycarbonate Lenses: Which Should You Choose?