1. Football players’ contrast sensitivity comparison when wearing amber sport-tinted or clear contact lenses 
Eric Porisch, O.D. 
Optometry-Journal of the American Optometric Association 
Volume 78, Issue 5, Pages (May 2007)
DOI: /j.optm
Copyright © 2007 American Optometric Association Terms and Conditions

2. Figure 1 Comparison of contrast sensitivity—all athletes.
Optometry-Journal of the American Optometric Association  , DOI: ( /j.optm )
Copyright © 2007 American Optometric Association Terms and Conditions

3. Figure 2 Comparison of contrast sensitivity—emmetropes only.
Optometry-Journal of the American Optometric Association  , DOI: ( /j.optm )
Copyright © 2007 American Optometric Association Terms and Conditions