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Considerations in Contact Lens Use Under Adverse Conditions Proceedings of a Symposium (1991) / Chapter Skim
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Corneal Topography and Contact Lenses
Pages 68-73

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
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From page 68...
... Since the corneal surface is the major refracting element in the eye, even small changes in its shape can alter visual acuity. Visual acuity of 20/20 or better is required for air-to-air combat as well as for any other mission relying on direct visual sighting such as marksmanship.
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From page 69...
... Stereo-pair wire models of corneal surface distortion failed for the majority of the clinical audience. However, when color-coded contour maps of corneal surface powers were presented, clinicians could easily interpret their meaning and use them for diagnosis, for evaluation of refractive surgery, and for guidance in the correction of astigmatism following corneal transplantation and cataract procedures (Maguire et al., 1987~.
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From page 70...
... The cross-hair lies at the apex of the putative cone, and the score box In the upper nght-hand corner reads 45.7D at this point. The key In the lower right indicates that over the near-normal range of corneal powers (1.SD intervals)
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From page 71...
... Case 2 Another patient presented with pain and glare sensitivity in both eyes. She was wearing Hydrocurve soft contact lenses with a base curve of 9.5 millimeters.
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From page 72...
... Klyce, LSU Eye Center, unpublished data. ~ _ FIGURE 4 The cornea of Figure 3 was completely nommal 3 weeks after discontinuing contact lens wear.
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From page 73...
... Advances in technology have made it possible to evaluate contact lens effects on corneal shape. This technology should be used in prospective studies to determine the risk factors associated with contact lens wear in adverse con.
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Key Terms

  • contact lens
  • lens wear
  • visual acuity
  • corneal surface
  • corneal shape

  • corneal topography
  • eye center
  • corneal warpage
  • regular corneal
  • photokeratoscopic images

  • base curve
  • corneal cylinder
  • topographic changes
  • evaluate contact
  • prospective studies

  • allow accurate
  • contour maps
  • refracting element
  • fashion permitting
  • purely spherical

  • chronic effects
  • major consideration
  • subsequent research
  • louisiana state
  • topography analysis

  • discontinuing contact
  • exhibited regular
  • design graphical
  • difficult task
  • contour map


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