Page 21 of Lensmart

Oleophobic Coatings: Why High-End Lenses Repel Smudges and Water

Covers the technology, lab tests for durability, and essential do's and don'ts for maintaining high-end lens coatings.

Decoding Temple Arm Length for a Secure Sunglass Fit

Guide to understanding temple arm length for sunglasses. Learn how to measure for a perfect fit, diagnose issues, and ensure comfortable wear all day.

AR Coating Peeling? Why Hot Water and Soap Ruin Your Lenses

Covers thermal shock, harsh chemicals, and abrasives that destroy AR coatings, plus a step-by-step safe cleaning and storage method.

How Frame Shape Influences Sunglass Size Perception

This guide debunks the 'eye size' myth, explaining how sunglass frame shape dictates fit, coverage, and style. Learn to choose the right shape for sun protection, high prescriptions, and different nose bridges with confidence.

Free-form Digital Surfacing: Point-by-Point Lens Optimization

Compares conventional vs. digital lens surfacing, detailing benefits for night driving and why precise PD measurement is critical for results.

Using a Credit Card to Quickly Estimate Your Frame Size

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

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

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?

Explains the science of polarization, screen interactions, and when to use or avoid these lenses.

How to Stop Sports Sunglasses From Fogging Up

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?

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

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.

16 17 18 19 20 21 22 23 24 25