Probability Calculations for NRC

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Normal Retinal Correspondence

1. ecnrc = Esotropia - Constant
2. xcnrc = Exotropia - Constant
3. eonrc = Esotropia - Occasional
4. xonrc = Exotropia - Occasional

          Prognosis for Functional Cure (Strabismus Probabilities for NRC)

                        Conditions:   ecnrc   xcnrc   eonrc   xonrc
                    Basic prognosis    0.30    0.50    0.60    0.80

     Plus Factors
          Good Second-Degree Fusion   +0.10   +0.00   +0.10   +0.00
           Family History of Squint   +0.10   +0.00   +0.10   +0.00
                       No Amblyopia   +0.10   +0.10   +0.10   +0.10
                  Deviation < 16pd.   +0.10   +0.00   +0.00   +0.00

     Minus Factors
                 Marked Suppression   -0.10   -0.00   -0.10   -0.00
                 Marked Incomitence   -0.10   -0.10   -0.10   -0.10
                     Deep Amblyopia   -0.10   -0.10   -0.10   -0.10
               Dissociated Vertical   -0.05   -0.05   -0.05   -0.05
     Nystagmus (Manifest or Latent)   -0.05   -0.05   -0.05   -0.05

                 Adjusted prognosis    0.__    0.__    0.__    0.__

                                      Check conditions that apply
                                      Calculate Success Probability
                                        for appropriate condition