Ophthalmology Book


Pinhole Test

Aka: Pinhole Test
  1. Indications
    1. Decreased Visual Acuity in children
    2. Differentiates Refractive Error from other defects
      1. Example: Amblyopia
  2. Background
    1. Pinhole restricts light to the center of the Cornea
    2. Corneal center passes light through pupil to Retina WITHOUT Refraction
  3. 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
  4. Interpretation
    1. Pinhole significantly improves Vision
      1. Suggests Refractive Error
    2. Pinhole does not improve Vision
      1. Suggests Amblyopia or other non-refractive cause

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