OnExam

The cover-uncover test is used to detect heterophoria or abnormalities in conjugate gaze. To perform:

  • Ask the patient to look at an object at the end of the room
  • Cover the patient’s left eye with your right hand watching for movement in the uncovered right eye to take up fixation
  • Uncover the left eye
  • Cover the right eye with your left hand watching for movement in the uncovered left eye to take up fixation
  • If there is fixation movement, the patient has heterotopia (strabismus)

References

  1. Bickley LS, Szilagyi PG. Bates' Guide to Physical Examination and History-Taking, 11th ed. Baltimore: Lippincott Williams & Wilkins; 2011.
  2. Cline, MC, Ma, JM, Cydulka, RK, Meckler, GD, Handel, DS, and Thomas, SH. Tintinalli’s Emergency Medicine: A Comprehensive Study Guide, 7th ed. New York: McGraw-Hill Professional; 2010.
  3. Hay, WW, Levin, MJ, Deterding, RR, and Abzug, MJ. Current Diagnosis and Treatment: Pediatrics, 22nd ed. New York: McGraw-Hill Professional; 2014.
  4. Leblond, R.F., Brown, D.D., and DeGowin, R.L. DeGowin’s Diagnostic Examination, 9th ed. New York: McGraw-Hill Professional; 2008.
  5. McDonnell, C. Assessment of the anterior chamber angle and depth. http://www.optometry.co.uk/uploads/articles/Clinical15Oct2010.pdf (accessed 24 December 2014).