Judged: two independent readers; copy check clear.
functional blindness
functional blindness Functional blindness is loss or disturbance of sight that occurs without recognizable eye changes visible on examination.
Functional blindness is loss or disturbance of sight that occurs without recognizable eye changes visible on examination. In this historical usage, it includes temporary dimness, partial visual losses, altered colour vision, or subjective visual phenomena associated with conditions such as anaemia, neuralgia, neurasthenia, severe headache, or hysteria.