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What Is Transient Diplopia?

A temporary episode of double vision (seeing two distinct images of a single object) that resolves spontaneously and completely within seconds, minutes, or a few hours. It is often a warning sign of an underlying issue.

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What Is Transient Diplopia?

A temporary episode of double vision (seeing two distinct images of a single object) that resolves spontaneously and completely within seconds, minutes, or a few hours. It is often a warning sign of an underlying issue.

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Causes

Common causes include: simple fatigue or stress, acute changes in refractive error, severe dry eyes, temporary muscle fatigue (phoria breakdown), or acute, temporary neurological events (e.g., small, transient ischemic attack or migraine aura).

Monocular vs. Binocular

It is important to determine if the diplopia persists when one eye is covered. Binocular diplopia indicates an eye alignment (strabismus) issue; Monocular diplopia indicates a media opacity (e.g., lens subluxation or corneal issue).

Clinical Management

Requires a full examination, especially if binocular, to rule out serious underlying causes like acute cranial nerve palsy or other neurological dysfunction.

Can dry eyes cause it?

Yes. Severe dry eye can cause an unstable tear film, leading to temporary irregular astigmatism, which can cause monocular diplopia.

How does fatigue cause it?

Visual fatigue can cause the binocular fusion mechanism (vergence) to temporarily break down, leading to a temporary misalignment (decompensated phoria).

What is the most serious cause?

A transient ischemic attack (TIA) or minor stroke affecting the cranial nerves (III, IV, or VI) that control eye movement is the most serious potential cause.