Sloan letter
Noun
Meaning
Sloan letter (plural Sloan letters)
Any of a set of standard optotypes resembling the letters C, D, H, K, N, O, R, S, V and Z.
Noun
Sloan letter (plural Sloan letters)
Any of a set of standard optotypes resembling the letters C, D, H, K, N, O, R, S, V and Z.