amblyopia

Concise Oxford English Dictionary © 2008 Oxford University Press:
amblyopia /ˌamblɪˈəʊpɪə/

▶noun Medicine impaired or dim vision without obvious defect or change in the eye.

– derivatives
amblyopic adjective.

– origin C18: from Gk ambluōpia, from ambluōpos (adj.), from amblus ‘dull’ + ōps, ōp- ‘eye’.