Resources

Visual Acuity Testing — Clinical Guides

Practical articles on visual acuity testing, digital eye charts, and ophthalmic workflow — written by Mark S. Brown, MD, oculoplastic surgeon and founder of AcuityMaster.

Clinical Guide

Snellen vs. ETDRS: When to Use Each in Clinical Practice

Snellen and ETDRS both measure visual acuity — but they are not interchangeable. Here is when each standard applies, how to convert between them, and why ETDRS is required for retinal disease monitoring and clinical trials.

By Mark S. Brown, MD — Coming soon

Coming soon

Setup Guide

How to Set Up a Digital Eye Chart System in Your Exam Lane

A step-by-step guide to replacing your projector with a computer-based acuity system. Covers monitor selection, dual-display configuration, patient distance calibration, and ANSI Z80.21 compliance.

By Mark S. Brown, MD — Coming soon

Coming soon

Clinical Guide

Pediatric Optotypes: Choosing the Right Chart for Young Patients

Lea Symbols, HOTV, Tumbling E, Landolt C — each optotype has a specific clinical use case and appropriate age range. This guide helps you select the right chart for every pediatric patient encounter.

By Mark S. Brown, MD — Coming soon

Coming soon

Workflow

Digital Eye Chart vs. Projector: What the Math Actually Shows

Projector systems are familiar — but the hidden costs of bulb replacement, warm-up delays, and limited chart types add up. A data-driven comparison of time cost, hardware cost, and clinical capability over a 5-year practice horizon.

By Mark S. Brown, MD — Coming soon

Coming soon

More articles coming soon

Each article is written by Dr. Mark S. Brown, MD from 25+ years of clinical practice in ophthalmology and optometry. Register your interest to be notified when new content is published.

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