Field restriction and vignetting in contact lenses with opaque peripheries.

  title={Field restriction and vignetting in contact lenses with opaque peripheries.},
  author={Andrew Carkeet},
  journal={Clinical & experimental optometry},
  volume={81 4},
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

From This Paper

Topics from this paper.
8 Citations
0 References
Similar Papers


Publications citing this paper.
Showing 1-8 of 8 extracted citations

Similar Papers

Loading similar papers…