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Cover TestAka: Cover-Uncover Exam
- Indications
- Testing for Strabismus (exotropia or esotropia)
- Technique
- Child fixates on a point
- Penlight
- Interesting target (e.g. small toy)
- Cover one eye
- Observe movement of uncovered eye
- Cover other eye and repeat test
- Child fixates on a point
- Interpretation (based on movement of uncovered eye)
- Normal: uncovered eye maintains current position
- Exotropia: Eye moves inward to pick up fixation
- Esotropia: Eye moves outward to pick up fixation
- False results
- Causes of false positive cover test
- Inattention of child
- Causes of false negative cover test
- Amblyopia of uncovered eye prevents re-fixation
- Causes of false positive cover test
- References
- Berson (1987) Ophthalmology Study Guide, AAO, p. 104
- Essman (1992) Am Fam Physician 46(4):1243
- Mills (1999) Am Fam Physician 60(3):907
- Simon (2001) Am Fam Physician 64(4):623
Cover test findings (C0444883) | |
|---|---|
| Concepts | Finding (T033) |
| English | Cover test, Cover test finding, Cover test findings, CT - Cover test, Eye screen test |
| Spanish | prueba de la pantalla ocular, prueba de oclusion, prueba del ojo cubierto - hallazgo |
| Parent Concepts | Ophthalmological test finding (C0429488), Visual acuity finding (C0442746) |
| Sources | MTH, SCTSPA, SNOMEDCT Derived from the NIH UMLS (Unified Medical Language System) |
