10 Crazy Things Contacts Can Do

Cure Blindness
Can blindness be reversed through contact lens therapies? Scientists are working on it. © vitor costa/iStock/Thinkstock

Scientists are using stem cell-infused contact lenses to restore sight to people with corneal damage and related blindness.

While still experimental, the process starts with harvesting limbal stem cells from the eyes of the patient or a donor). These are special cells the body naturally produces whenever it needs to repair a minor corneal problem with your eye, such as damage from dust, debris and even blinking; if you don't have enough of them, your vision becomes compromised. The collected limbal stem cells are then grown directly on contact lenses. When worn by a patient with corneal damage, these specially coated lenses transfer the stem cells from the contact to the cornea, where they repair and regenerate tissue. Researchers in Australia found that two out of three legally blind patients who tried the contacts regained some sight. And the third? The third patient passed the vision test of a driving exam [source: Smith].

Author's Note: 10 Crazy Things Contact Lenses Can Do

I think my favorite take-away fact about eyes discovered while researching and writing this article is that healthy human eyes see at a resolution of just about one megapixel (not that we actually see in pixels; this is just an equivalent). So that new Ultra HD TV you've had your eye on? It turns out your eyes really won't be able to tell the difference between that and the high-def TV you already have.

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  • American Academy of Ophthalmology. "Eye Health Statistics at a Glance." April 2011. (Feb. 16, 2014) http://www.aao.org/newsroom/upload/Eye-Health-Statistics-April-2011.pdf
  • American Optometric Association. "Myopia (Nearsightedness)." (Feb. 16, 2014) http://www.aoa.org/patients-and-public/eye-and-vision-problems/glossary-of-eye-and-vision-conditions/myopia
  • Barr, Joseph T. "Contact Lenses 2005." Contact Lens Spectrum. Jan. 1, 2006. (Feb. 16, 2014) http://www.clspectrum.com/articleviewer.aspx?articleid=12913
  • Bausch + Lomb. "PureVision Lenses for Therapeutic Use." (Feb. 16, 2014) http://www.bausch.com/en/ecp/our-products/contact-lenses/therapeutic-lenses/purevision-lenses-for-therapeutic-use/
  • Bausch + Lomb. "PureVision Multi-Focal Contact Lenses." (Feb. 16, 2014) http://www.bausch.com/our-products/contact-lenses/contact-lenses-for-presbyopia-multifocal/purevision-multi-focal/
  • Boughton, Barbara. "PRK: Feeling Better and Healing Faster." EyeNet Magazine. (Feb. 16, 2014) http://www.aao.org/publications/eyenet/200809/refractive.cfm
  • Children's Hospital Boston. "Drug-dispensing Contact Lens." July 23, 2009. (Feb. 16, 2014) http://www.sciencedaily.com/releases/2009/07/090721111535.htm
  • de Gracia, P.; Dorronsoro, C.; Sanchez-Gonzalez, A.; Saides, L.; and S. Marcos. "Experimental simulation of simultaneous vision." Investigative Ophthalmology & Visual Science. Vol. 54, no. 1. Pages 415-422. Jan. 17, 2013. (Feb. 16, 2014) http://www.ncbi.nlm.nih.gov/pubmed/23233256
  • Draxler, Breanna. "Telescopic Contact Lens Lets You Zoom In to Improve Vision." Discover. July 8, 2013. (Feb. 16, 2014) http://blogs.discovermagazine.com/d-brief/2013/07/03/telescopic-contact-lens-lets-you-zoom-in-to-improve-vision/#.UwAIxvldVbw
  • Erickson, GB.; Horn, FC.; Barney, T.; Pexton, B.; and RY Barid. "Visual performance with sport-tinted contact lenses in natural sunlight." Optometry and Vision Science. Vol. 86, no. 5. Pages 509-516. May 2009. (Feb. 16, 2014) http://www.ncbi.nlm.nih.gov/pubmed/19319013
  • Family EyeCare Center. "Children's Eyewear & Vision: Controlling Myopia with Contact Lenses." (Feb. 16, 2014 http://www.familyeyecare.com/childrens-myopia-family-eyecare-san-jose-campbell.html
  • Fox News. "Stem cells used to repair damaged eyes in world-first trial." June 8, 2012. (Feb. 16, 2014) http://www.foxnews.com/health/2012/06/08/stem-cells-used-to-repair-damaged-eyes-in-world-first-trial/
  • GP ContactLenses. (Feb. 16, 2014) http://www.contactlenses.org/
  • Hickey, Hannah. "Contact lenses with circuits, lights a possible platform for superhuman vision." University of Washington. Jan. 1, 2008. (Feb. 16, 2014) http://www.washington.edu/news/2008/01/17/contact-lenses-with-circuits-lights-a-possible-platform-for-superhuman-vision/
  • Hiraoka, T.; Ishii, Y.; Okamoto, F.; and T. Oshika. "Influence of cosmetically tinted soft contact lenses on higher-order wavefront aberrations and visual performance." Graefe's Archive for Clinical and Experimental Ophthalmology. Vol. 247, no. 2. Pages 225-233. February 2009. (Feb. 16, 2014) http://www.ncbi.nlm.nih.gov/pubmed/18953556
  • Imec. "Imec and Ugent unveil breakthrough in augmented reality contact lens - Curved LCD display holds widespread potential for medical and cosmetic applications." May 12, 2012. (Feb. 16, 2014) http://www2.imec.be/be_en/press/imec-news/imecugentcontactlensdisplay.html
  • Lemp, Michael A. "Contact Lenses and Allergy." Current Opinion in Allergy and Clinical Immunology. Vol. 8, no 5. Pages 457-460. 2008. (Feb. 16, 2014) http://www.medscape.com/viewarticle/583607_6
  • Limb, G. Astrid; Becker, Silke; and Matt Smart. "The eye and stem cells: the path to treating blindness." EuroStemCell. Aug. 20, 2012. (Feb. 16, 2014) http://www.eurostemcell.org/factsheet/eye-and-stem-cells-path-treating-blindness
  • Lingley, AR.; Ali, M.; Liao, Y.; Klonner, M.; Sopanen, M.. Suihkonen, S.; Shen, T.; Otis, BP.; Lipsanen, H.; and BA Parvi. "A single-pixel wireless contact lens display." Journal of Micromechanics and Microengineering. Vol. 21, no. 12. December 2011. (Feb. 16, 2014) http://iopscience.iop.org/0960-1317/21/12/125014
  • Locke, Tim. "Google Crafting Contact Lenses for Diabetes." WebMD. Jan. 17, 2014. (Feb. 16, 2014) http://www.webmd.com/diabetes/news/20140117/contact-lenses-diabetes
  • National Eye Institute (NEI). "An Experimental Contact Lens to Prevent Glaucoma-Induced Blindness." January 2014. (Feb. 16, 2014) http://www.nei.nih.gov/news/briefs/experimental_contact_lens.asp
  • National Eye Institute (NEI). "Facts About Presbyopia." October 2010. (Feb. 16, 2014) http://www.nei.nih.gov/health/errors/presbyopia.asp
  • National Eye Institute (NEI). "Facts About Refractive Errors." October 2010. (Feb. 16, 2014) http://www.nei.nih.gov/health/errors/errors.asp
  • National Eye Institute (NEI). "Nearsightedness." (Feb. 16, 2014) http://www.nei.nih.gov/healthyeyes/myopia.asp
  • National Eye Institute (NEI). "NEI Clinical Studies: Contact Lens and Myopia Progression Study, The." (CLAMP) Jan. 31, 2001. (Feb. 16, 2014) http://www.nei.nih.gov/neitrials/static/study81.asp
  • O'Connor, Anahad. "Really? Tinted Contact Lenses Can Improve Athletic Performance" The New York Times. Oct. 15, 2012. (Feb. 16, 2014) http://well.blogs.nytimes.com/2012/10/15/really-tinted-contact-lenses-can-improve-athletic-performance/?_php=true&_type=blogs&_r=0
  • Roberts, Michelle. "Bionic contact lens 'to project emails before eyes'." BBC News. Nov. 21, 2011. (Feb. 16, 2014) http://www.bbc.co.uk/news/health-15817316
  • Schultz, Colin. "These Contact Lenses Can Zoom In and Out, Give You Telescopic Vision." Smithsonian. July 2, 2013. (Feb. 16, 2014) http://www.smithsonianmag.com/smart-news/these-contact-lenses-can-zoom-in-and-out-give-you-telescopic-vision-5864170/
  • Smith, Dan. "Stem-Cell-Coated Contact Lenses Are Curing the Blind." Popular Science. June 3, 2009. http://www.popsci.com/scitech/article/2009-06/curing-blindness-contact-lenses
  • Tsukayama, Hayley. "Google's smart contact lens: What it does and how it works." The Washington Post. Jan. 17, 2014. (Feb. 16, 2014) http://www.washingtonpost.com/business/technology/googles-smart-contact-lens-what-it-does-and-how-it-works/2014/01/17/96b938ec-7f80-11e3-93c1-0e888170b723_story.html
  • Tremblay, Eric J.; Stamenov, Igor; Beer, R. Dirk; Arianpour, Ashikan; and Joseph E. Ford. "Switchable telescopic contact lens." Optics Express. Vol. 21, no. 13. Page 15980-15986. 2013. (Feb. 16, 2014) http://www.opticsinfobase.org/oe/fulltext.cfm?uri=oe-21-13-15980&id=258366
  • U.S. Food and Drug Administration (FDA). "Decorative Contact Lenses: Is Your Vision Worth It?" Oct. 24, 2013. (Feb. 16, 2014) http://www.fda.gov/forconsumers/consumerupdates/ucm275069.htm
  • University of Illinois, College of Medicine at Chicago. "Rigid Contact Lenses." (Feb. 16, 2014) http://chicago.medicine.uic.edu/cms/One.aspx?pageId=15396164
  • UPI. "New contact lenses give telescopic vision to help eye problems." July 2, 2013. (Feb. 16, 2014) http://www.upi.com/Science_News/Technology/2013/07/02/New-contact-lenses-give-telescopic-vision-to-help-eye-problems/UPI-41571372804953/
  • Weber, Belinda. "Contact lenses can deliver glaucoma drugs for a month." Medical News Today. Dec. 9, 2013. (Feb. 16, 2014) http://www.medicalnewstoday.com/articles/269899.php
  • Yao, H.; Liao, Y.; Lingley, AR.; Afanasiev, A.; Lahdesmaki, I.; Otis, BP.; and BA Parviz. "A contact lens with integrated telecommunication circuit and sensor for wireless and continuous tear glucose monitoring." Journal of Micromechanics and Microengineering. Vol. 22, no. 7. June 2012. (Feb. 16, 2014) http://iopscience.iop.org/0960-1317/22/7/075007?rel=sem&relno=1


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