The purpose of the duochrome test during your eye exam

Q: What is the purpose of a duochrome test?

The duochrome test is used to help eye care professionals find the right lens prescription for you. It shows how clearly you can see when looking at red and green colors, which can tell the doctor more about your vision.

Q: What is the alternative to the duochrome test?

An alternative to the duochrome test is using different types of lenses or visual acuity tests that measure how well you can see letters or shapes. These methods also help eye doctors determine if you need glasses or other vision corrections.

Q: Why do eye care professionals ask if red or green is clearer?

Eye care professionals ask if red or green looks clearer to help choose the best lenses for your eyes. Your answer helps them figure out how your eyes focus light and what kind of vision correction you might need.

Published on August 18, 2025

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4 minute read time

Duochrome test basics

What to expect at a duochrome test

First, determining if a duochrome test is necessary

What to expect at your first eye exam

When is a duochrome test used?

Setting up the duochrome test

Duochrome, step by step

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FAQs

Frequently asked questions

What is the purpose of a duochrome test?

What is the alternative to the duochrome test?

Why do eye care professionals ask if red or green is clearer?