myopsis

English

Etymology

From Ancient Greek μυῖα (muîa, “fly”) + ὄψις (ópsis, “sight”). Although myopia is superficially very similar in both the English and original Greek forms, the first parts of the two compounds aren't related.

Noun

myopsis (usually uncountable, plural myopses)

1. (medicine, obsolete) The appearance of muscae volitantes.
   • 1854, William Mackenzie, Thomas Wharton Jones, A practical treatise on the diseases of the eye, page 909:

     When the sight is perfect, and still more when it is presbyopic, the pupil will have frequent occasion to contract, in aiding the person to see near objects more distinctly, and thus an habitual degree of myopsis may be produced.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “myopsis”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)