Exam

Pinhole Test

search

Pinhole Test

  • See Also
  1. Pediatric Eye Exam
  • Indications
  1. Decreased Visual Acuity in children
  2. Differentiates Refractive Error from other defects
    1. Example: Amblyopia
  • Background
  1. Pinhole restricts light to the center of the Cornea
  2. Corneal center passes light through pupil to Retina WITHOUT Refraction
  • Technique
  1. Check Vision initially with eye charts per age
    1. See Pediatric Vision Screening for appropriate tests
  2. Perform Pinhole Test if Vision <20/20
    1. Test each eye individually
    2. Child repeats eye chart while looking through pinhole
  • Interpretation
  1. Pinhole significantly improves Vision
    1. Suggests Refractive Error
  2. Pinhole does not improve Vision
    1. Suggests Amblyopia or other non-refractive cause