| Type | Color difference test book |
|---|---|
| Brand | Unbranded |
Check the listing for details. Ishihara Optical Testing Book with Eye Shading Lenses for Professionals. Condition: New. Listed at 55.72 USD. 1 Color Difference Test Book+Eye shading lenses. Material: paper. -Color plates are attached to a specially designed album-type book for easy operation. -Professional test book, is a simple and accurate way to discover congenital color blindness and red-green color blindness, each of which has two forms, complete and incomplete.