MutterMuseum

Colorblindness tests are available all over the internet these days, but historically it wasn't considered too big a problem; until railroads started having accidents because workers couldn't read the signals! Dr. Thompson's Colorblindness Test was used in the second half of the 1800s and beyond. The detailed instructions for completing the test can be read on the box.

Photos by Evi Numen

More about this case

Resolved

Why you should join Figure 1

• Share your knowledge with our global community of healthcare professionals
• Get help from experts in your field
• Learn from our library of real-world cases and quizzes

Similar cases

We’re using this time to spotlight the contributions that Black people have made to modern medicine.

A 67/f came in due to 20 year history of tinnitus.

bilateral #Cochlear-implant 23 Y/O M. 1 year post op with 100% comprehension in HINT testing.

Trending now

A 52-year-old man presented with a 20-minute history of chest pain radiating to the left shoulder and neck.

A 28-year-old woman presented with a 3-day history of intense pruritus over the lower back.

A 4-month-old male infant presented with skin lesions localized to the chin for the past 3 days.

patient in late teens presenting after a collapse, no chest pain, no previous cardiac history.