Observations on vertical divergences and hyperphorias.

@article{Ogle1953ObservationsOV,
  title={Observations on vertical divergences and hyperphorias.},
  author={Kenneth N. Ogle and Avery de H. Prangen},
  journal={A.M.A. archives of ophthalmology},
  year={1953},
  volume={49 3},
  pages={
          313-34
        }
}
THE VERTICAL prism vergences (variously called vertical fusional amplitudes and maximal vertical divergences) of most subjects are of the order of ±2.5 to ±3 Δ.1With repeated or prolonged testing it may sometimes be possible to increase these limits a little.2Ophthalmologists usually regard this range of vertical prism vergences as implying fixed limits in the ability of neuromuscular apparatus and the fusion powers of the two eyes to make vertical divergences. Hyperphorias are considered of… CONTINUE READING

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