Ophthalmology Book

http://www.fpnotebook.com/

Cover Test

Aka: Cover Test, Cover-Uncover Exam
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  1. Indications
    1. Testing for Strabismus (exotropia or esotropia)
  2. Technique
    1. Child fixates on a point
      1. Penlight
      2. Interesting target (e.g. small toy)
    2. Cover one eye
    3. Observe movement of uncovered eye
    4. Cover other eye and repeat test
  3. Interpretation (based on movement of uncovered eye)
    1. Normal: uncovered eye maintains current position
    2. Exotropia: Eye moves inward to pick up fixation
    3. Esotropia: Eye moves outward to pick up fixation
  4. False results
    1. Causes of false positive Cover Test
      1. Inattention of child
    2. Causes of false negative Cover Test
      1. Amblyopia of uncovered eye prevents re-fixation
  5. References
    1. Berson (1987) Ophthalmology Study Guide, AAO, p. 104
    2. Essman (1992) Am Fam Physician 46(4):1243-52
    3. Mills (1999) Am Fam Physician 60(3):907-16
    4. Simon (2001) Am Fam Physician 64(4):623-8

Cover test findings (C0444883)

Concepts Finding (T033)
SnomedCT 11813006, 264830009
English cover test result, cover test, covered test, Cover test, Eye screen test, CT - Cover test, Cover test (finding), Cover test findings, Cover test findings (finding), Cover test finding (finding), Cover test finding
Spanish prueba de la pantalla ocular, prueba de oclusión (hallazgo), prueba de oclusión, prueba del ojo cubierto - hallazgo (hallazgo), prueba del ojo cubierto - hallazgo
Sources
Derived from the NIH UMLS (Unified Medical Language System)


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