Definition of optotype in English:

optotype

noun

Ophthalmology
  • A type or letter of definite size used for testing acuteness of vision; a test-type.

Origin

Late 19th century; earliest use found in Mind. From opto- + type, after German Optotypus.

Pronunciation

optotype

/ˈɒptə(ʊ)tʌɪp/