Current vision screening methods

  1.  Amblyometer (Analyzing Brightness Sense)

   Benefits 
     a. Identifies Amblyopia directly at the cortical level.

     b. Quantifies Amblyopia
     c. Objective
   Problems
     None identified
 

 2.  Visual Acuity by automation (DiagnosticGame app)

   Benefits

     a. Measures visual acuity without technician bias
     b. Only the child interacts with the iPad and results are permanently recorded.
     c. Objective

   Problem
      Does not identify amblyopia, only measures uncorrected visual acuity.

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3. Visual acuity testing by a technician
   Benefit
      Measures visual acuity
   Problem

   a.  Does not identify amblyopia, only measures uncorrected visual acuity.

   b.  False negative when the child  "peeks" with the good eye or memorizes the chart.
   c.  Requires experienced technician to avoid improper testing technique and bias
   d.  Subjective
 

4. Auto-refractor

   Benefits
     a. Measures refractive errors
     b. Objective
   Problems
    a. Does not identify amblyopia
    b. Does not measure visual acuity
 

5. Photo-Screening

   Benefits
     a. Identifies risk factors for amblyopia
     b. Objective

   Problems
    a. Does not identify amblyopia
    a.  Risk factors = 15-20%; Amblyopia = 1-4%
    b.  Many false positives leading to over referrals