0_Apprentice
do you know anyone with colorblindness?
1_Wizard
Yes, we had a co-worker who was colorblind. It is very strange and unfortunate thing that can happen to a human being
0_Apprentice
really interesting. did you witness/experience anything with them that affected their daily living negatively? 
1_Wizard
Not really. He was behaving normally as he would. By the way, are you knowledgeable about brain disease called dementia