Astigmatism

• Stanford University School of Medicine — Stanford, California, United States
• 20/20 Institute — Indianapolis, Indiana, United States
• Durrie Vision — Overland Park, Kansas, United States
• Johns Hopkins University School of Medicine — Baltimore, Maryland, United States

• Clinical Research Center, University of California, Berkeley — Berkeley, California, United States
• Center for Contact Lens Research, University of Waterloo — Waterloo, Ontario, Canada

• Kodama Eye Clinic — Terada, Kyoto, Japan
• Dougenzaka Ioti Eye Clinic — Shibuya City, Tokyo-to, Japan

• Zhongshan Ophthalmic Center — Guangzhou, Guangdong, China

• Clinical Research Center, University of California, Berkeley — Berkeley, California, United States
• Center for Contact Lens Research, University of Waterloo — Waterloo, Ontario, Canada

Not specified

• Edward S. Wygonik, OD — Jacksonville, Florida, United States
• The Eye Center — Pembroke Pines, Florida, United States
• Eye Associates of Winter Park — Winter Park, Florida, United States
• Eyecare Associates — Bloomington, Illinois, United States

Not specified

• Optometry Clinic, National Autonomous University — Mexico City, Mexico

• National Advanced Driving Simulator — Iowa City, Iowa, United States