Ishihara color test
Cartas de Ishihara
- Date
- 1917 · confidence high
- Place
- University of Tokyo, Tokyo, Japan
- Credited to
- Shinobu Ishihara
- Field
- Life & health
What it is
Ophthalmologist Shinobu Ishihara published a test of plates with colored dots forming numbers or paths visible to people with normal color vision but hard to distinguish for those with red-green color deficiency.
What it led to
- Standard color-blindness screening test in occupational medicine
- Military and aviation use to rule out color deficiency
- Shortened 10-, 14- and 24-plate versions