Saulo Garcia

I grew up inside an optical shop. My mother likes to tell how, as a kid, I would watch eyeglasses being assembled, play with the tools, and draw on the back of service order slips. The family business taught me early what a precise measurement and work done right are worth. I went on to spend more than twenty years as a software engineer, always keeping an eye on the optical world. Optogrid was born where the two meet: digital measurement technology (pupillary distance and fitting heights) built by someone who knows the dispensing counter from the inside.

Fitting Height Calculator: Minimum Fitting Heights for Progressive Lenses

Fitting Height Calculator: Minimum Fitting Heights for Progressive Lenses

August 3, 2026

Enter the frame's B measurement, the measured fitting height and the lens design's minimum to check whether a progressive job will work before you order it. Includes a sourced table of minimum fitting heights for Varilux, ZEISS, Hoya, Shamir and Kodak designs, plus the corridor and near-zone trade-offs behind the numbers.

Add Power by Age: Expected Reading Addition Chart

Add Power by Age: Expected Reading Addition Chart

July 24, 2026

A sourced add power by age reference table, how to use it as a dispensing sanity check, and how to verify ADD against the actual prescription instead of guessing from a patient’s age.

SILMO Paris 2026: The Fall Optical Trade Show Guide for ECPs

SILMO Paris 2026: The Fall Optical Trade Show Guide for ECPs

July 19, 2026

SILMO Paris 2026 runs September 25 to 28 at Paris Nord Villepinte: roughly 900 exhibitors, design-led rather than transactional, and now the closest thing North America has to a fall trade show since Vision Expo West ended in 2025. This guide covers dates, the Silmo d’Or awards, an honest SILMO vs. MIDO vs. Vision Expo comparison, and logistics for ECPs deciding whether to make the trip.

TR90 Glasses Frames: What the Material Is and Who It Is For

TR90 Glasses Frames: What the Material Is and Who It Is For

July 18, 2026

TR90 is the trade name most opticians use for Grilamid TR 90, a transparent nylon resin made in Switzerland that bends without snapping. Here is what the material actually is, how it holds up against acetate and titanium, and who should be steered toward it at the dispensing table.

Slab-Off Lenses: Correcting Vertical Prism Imbalance

Slab-Off Lenses: Correcting Vertical Prism Imbalance

July 17, 2026

Slab-off (bicentric grinding) corrects the vertical prism imbalance that builds up when an anisometropic wearer reads through a multifocal. How the correction works, regular versus reverse slab-off, a worked Prentice's rule example, and the alternatives a lab can offer instead.

How Long Does It Take to Adjust to New Glasses?

How Long Does It Take to Adjust to New Glasses?

July 16, 2026

Most people adjust to new glasses in days to two weeks, up to a month for progressives. Learn what's normal, the red flags, and when to see your optician.

How to Adjust Glasses at Home: A Step-by-Step Guide

How to Adjust Glasses at Home: A Step-by-Step Guide

July 15, 2026

Most glasses that slide down your nose, sit crooked, or dig into the sides of your head can be fixed at home in a few…

Blue Light Glasses on Reddit: What Users Actually Report

Blue Light Glasses on Reddit: What Users Actually Report

July 14, 2026

Reddit's take on blue light glasses in one line: optometrists are skeptical about eye strain, while some users report the amber versions help evening sleep.

What Does an Optician Do? Role, Skills, and How They Differ From Optometrists

What Does an Optician Do? Role, Skills, and How They Differ From Optometrists

July 14, 2026

An optician is the professional who turns an eye prescription into finished, properly fitting eyewear. Here's what the job actually involves day to day, the skills it requires, and exactly where it stops and an optometrist's or ophthalmologist's job begins.

Progressive Lens Markings: How to Read and Identify Progressive Lenses

Progressive Lens Markings: How to Read and Identify Progressive Lenses

July 13, 2026

Every progressive lens carries permanent laser engravings that survive once the ink layout is gone. Here’s how to read the alignment marks, add power and manufacturer codes, and restore the layout on the bench.