Keeler City University Colour Vision Test – 3rd Edition (Acquired Deficiency Assessment)

City University Colour Vision Test – 3rd Edition (1998 version) is designed to detect protan, deutan, and tritan colour vision deficiencies. Comprising two parts, Part One involves selecting one of four coloured samples closest to the central dot, while Part Two provides finer match discrimination.

This test offers stronger sensitivity for blue-yellow deficiencies not always detected by Ishihara tests—making it suitable for acquired or atypical colour vision loss. An included fast-screening option supports quick pass/fail determinations in occupational or general screening settings.

Bound in a durable hard-cover test book, it is supplied with recording charts and is made to order by Keeler. Delivery lead times should be confirmed on order.

Key Features

• Detects Protan, Deutan, and Tritan (blue-yellow) deficiencies—more comprehensive than standard red-green-only tests.

• Two-part test format: spot matching + closest hue discrimination

• Includes screener mode for rapid occupational screening

• Durable hard-bound format with optional recording chart packs available

• Developed and supplied by Keeler; available only to licensed professionals