intermittent exotropia
A common form of outward eye deviation that occurs only part of the time, often triggered by fatigue, illness, or distant fixation.
Full Definition
Intermittent exotropia is the most common form of exotropia in children, characterized by periods of normal eye alignment alternating with episodes of outward deviation of one eye. The condition typically manifests during distant fixation, fatigue, illness, or bright sunlight, with patients often closing one eye or squinting in sunlight. Classification systems grade the frequency and control of the deviation, which is crucial for determining surgical timing. Unlike constant exotropia, these children maintain some degree of binocular vision and stereopsis during periods of alignment, making early intervention important to preserve fusion capabilities.
Usage
Usage note: Specify control level (good, fair, poor) and triggering factors when documenting.
In Context
- "The child's intermittent exotropia was most noticeable during distant fixation and when tired." — Clinical examination report
- "Control of intermittent exotropia deteriorated from good to poor over the 6-month observation period." — Follow-up assessment documentation