Field restriction and vignetting in contact lenses with opaque peripheries.

@article{Carkeet1998FieldRA,
  title={Field restriction and vignetting in contact lenses with opaque peripheries.},
  author={Andrew Carkeet},
  journal={Clinical & experimental optometry},
  year={1998},
  volume={81 4},
  pages={151-158}
}
BACKGROUND: Some previous researchers have shown empirically that visual fields can be restricted by contact lenses with opaque and semi-opaque peripheral zones. However, there has been no formal statement of the optical theory behind such restriction. METHODS: Calculations are made of fields of view with opaque periphery contact lenses, based on paraxial theory and meridional finite ray tracing in the Gullstrand-Emsley schematic eye. RESULTS: This analysis shows that paraxial theory is… CONTINUE READING

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