The detection of colour-blindness & imperfect eyesight by the methods of Dr. Snellen, Dr. Daae, and Prof. Holmgren View on Open Library

The detection of colour-blindness & imperfect eyesight by the methods of Dr. Snellen, Dr. Daae, and Prof. Holmgren

by Charles Roberts

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First published: 1881 1 language
Subjects
Vision Disorders Color Vision Defects

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