What does diplopic mean?
Diplopic is an adjective used in medicine and ophthalmology to describe anything relating to diplopia, the perceptual condition commonly known as double vision, in which a single object is seen as two images. A patient may be described as diplopic, or a symptom, episode, or visual disturbance may be characterised as diplopic. The word derives from the Greek root 'diplo-', meaning double, combined with '-opia', relating to sight. It is a formal, clinical term that rarely appears outside specialist writing; everyday speech overwhelmingly prefers the plainer phrase 'double vision'. Diplopic is most likely to be encountered in case reports, neurological examinations, and textbooks covering disorders of the eye muscles, cranial nerves, or brainstem. Its usefulness lies in precision: it allows clinicians to distinguish true binocular double vision from monocular causes such as cataract or astigmatism, conditions where the underlying mechanism and treatment differ substantially.
adjectiveRelating to or affected with diplopia, the condition of seeing double; characterized by double vision.
- Of or relating to diplopia (double vision); experiencing or characterized by double vision.
"The neurologist noted that her diplopic symptoms worsened when she was fatigued."
"After the head injury, he complained of persistent diplopic vision whenever he looked to his left."
"The ophthalmologist recorded a diplopic response during the cover test."
Diplopic comes from Greek 'diploos' meaning 'double' — so a diplopic patient literally sees everything twice, thanks to a word that also gave us 'diploma' (a doubled-up folded document).
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of diplopic
Diplopic is formed from the Greek root 'diplo-', meaning 'double' or 'twofold' (from 'diploos'), combined with '-opia', from the Greek 'ōps' meaning eye or sight. The same doubling root appears in words like 'diploid' in genetics and 'diploma', which originally referred to a document folded double. The term entered medical English alongside 'diplopia' as clinicians sought precise adjectival forms for describing visual disturbances.
How diplopic is actually used
Diplopic is a technical adjective used almost exclusively in medical and ophthalmological contexts. It is rare in general prose, where writers typically use phrases such as 'double vision' or 'seeing double' instead. The noun form 'diplopia' is considerably more common than the adjective.
Easily confused with diplopic
Diploid describes cells containing two complete sets of chromosomes, whereas diplopic relates to double vision.