Eyeglass Lens & Frame Guides | Dr. Lens Change
-
Why Do Glasses Make My Eyes Look Smaller?
Why prescription lenses can change apparent eye size, and what to discuss before ordering replacements.
-
Why Do Progressive Lenses Have Tiny Engraved Markings?
Faint lens markings can be intentional. Learn what they help identify and what to do if a mark concerns you.
-
Why Are Glasses Lenses Thicker at the Edges?
Learn why lens thickness varies at the edges and centre, and what to ask before replacing lenses in your existing frames.
-
What Do the Numbers Inside Glasses Frames Mean?
Learn how to read frame size markings, why they are different from PD, and which details help when asking about replacement lenses.
-
Why Do Photochromic Lenses Get Darker in Cold Weather?
Understand why photochromic tint and fading can change in cold weather, and which questions to ask about your exact lenses.