Lensmart Blog
Using a Credit Card to Quickly Estimate Your Frame Size
• 2025-12-17 20:52:14
Guide reveals a simple credit card trick to estimate your sunglass frame size. Learn to measure face width, translate to frame dimensions, and troubleshoot common fit issues for confident online ordering.
Why Do Clear Frames Turn Yellow? Materials and UV Degradation
Lensmartonline • 2026-02-01 14:30:15
A detailed look at UV photo-oxidation and chemical reactions causing discoloration, plus daily care routines to keep frames clear.
How Pupillary Distance (PD) Affects Sunglass Sizing
• 2025-12-17 20:52:27
Measurement of pupillary distance (PD) is key for sunglass fit. Learn to measure your PD at home and apply it to frame dimensions for a perfectly tailored look online.
What is the rainbow effect on polarized lenses?
Lensmartonline • 2026-02-01 14:30:36
Explains the science of polarization, screen interactions, and when to use or avoid these lenses.
How to Stop Sports Sunglasses From Fogging Up
• 2025-12-17 20:52:38
Strategies to combat foggy sports sunglasses are detailed within. Understand how airflow, anti-fog coatings, and proper care ensure crystal-clear vision for peak performance.
Do High-Index Lenses Have More Chromatic Aberration?
• 2026-02-01 14:30:54
Covers the science of Abbe value, trade-offs with thinness, and solutions like aspheric design and anti-reflective coatings for better vision.
Solving Headaches from Tight Sports Sunglasses
• 2025-12-17 20:52:48
This guide explains why tight sports sunglasses cause headaches and how to perform an expert fit assessment. Learn to adjust frames and choose features for pain-free wear.
Thyroid Eye Disease: Choosing Frames to Disguise Proptosis
Lensmartonline • 2026-02-04 09:39:03
Covers frame depth, bold shapes, dark colors, and thin lenses to minimize the appearance of bulging eyes for confidence.
Keep Your Sunglasses Secure When You Sweat
• 2025-12-17 20:52:59
Guidance on keeping sports sunglasses secure during workouts. Learn to adjust nose pads, temples, and understand fit for a stable, comfortable, and fog-free experience.
Flashes and Floaters: When Your Eyewear Needs a Medical Visit
Lensmartonline • 2026-02-04 09:48:57
Covers self-check protocols, differentiating benign aging from retinal emergencies, and why glasses won't fix these symptoms.
How to Clean Sweat & Grime Off Your Lenses
• 2025-12-17 20:53:10
This guide details how to safely clean sweat, salt, and sunscreen from your eyewear lenses. Prevent scratches and damage with expert techniques, proper tools, and common mistake avoidance.
Post-Concussion Vision Syndrome: How Prism Lenses Help Recovery
Lensmartonline • 2026-02-04 09:49:14
Covers symptoms of Binocular Vision Dysfunction, the prism lens fitting process, and the difference between Fresnel and ground-in prisms.