Uncommon · Knowledge
Landolt C
Optotype
The Landolt C, also known as a Landolt ring, Landolt broken ring, or Japanese vision test, is an optotype—a standardized symbol used for testing vision. It was developed by the Swiss-born ophthalmologist Edmund Landolt.
From Wikipedia
The Landolt C, also known as a Landolt ring, Landolt broken ring, or Japanese vision test, is an optotype—a standardized symbol used for testing vision. It was developed by the Swiss-born ophthalmologist Edmund Landolt.
Text: Wikipédia, CC BY-SA 4.0. · Image: DarkEvil (Public domain) ·
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