• A visual symptom in which a single object is perceived by the visual cortex as two objects rather than one. Disorders associated with this condition include REFRACTIVE ERRORS; STRABISMUS; OCULOMOTOR NERVE DISEASES; TROCHLEAR NERVE DISEASES; ABDUCENS NERVE DISEASES; and diseases of the BRAIN STEM and OCCIPITAL LOBE.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2021
• Diplopia is a condition in which a single object is perceived as two images, it is also known as double vision.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2021
• Perception of a single object as two images.
  NICHD Pediatric Terminology
  U.S. National Cancer Institute, 2021
• The condition in which a single object appears as two objects. Also called "double vision." (from medterms.com)
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• Diplopia is the perception of 2 images of a single object. Diplopia may be monocular or binocular. Monocular diplopia is present when only one eye is open. Binocular diplopia disappears when either eye is closed.
  Merck Manuals
  Merck & Co., Inc., 2020
• Diplopia is the subjective complaint of seeing 2 images instead of one and is often referred to as double-vision in lay parlance. The term diplopia is derived from 2 Greek words: diplous, meaning double, and ops, meaning eye.
  Medscape
  WebMD, 2019
• Double vision, perceiving of two images of a single object. Normal binocular vision results from the brain's fusion of slightly different images from each eye, with points on the retina of each eye corresponding to points on the retina of the opposite eye. Binocular diplopia occurs when the eyes...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2020