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Visual Angles

  1. Angle alpha (α)  Angle between optical axis and visual axis at the nodal point*
  2. Angle gamma (γ) – Angle between optical axis and fixation axis at the centre of rotation of the eyeball*
  3. Angle Kappa (κ) – Angle between visual axis and pupillary line*
    1. Positive angle kappa- pseudo exotropia*
    2. Negative angle kappa- Pseudo esotropia* 

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