Refractive Errors

• Visioncare research — Farnham, Surrey, United Kingdom
• Aston University Optometry Clinic — Birmingham, West Midlands, United Kingdom

• Istanbul Medipol Universty — Istanbul, Beykoz, Turkey (Türkiye)

• Maastricht University Medical Centre — Maastricht, Limburg, Netherlands

Not specified

• Hospital Contact Lens Service — Miami, Florida, United States
• Debbie Kim — Closter, New Jersey, United States
• West Village Eyecare — New York, United States
• Spokane Eye Clinic — Spokane, Washington, United States

• Oregon Health & Science University — Portland, Oregon, United States

• Eric M. White O. D., Inc — San Diego, California, United States
• Golden Vision — Sarasota, Florida, United States
• Kannarr Eye Care — Pittsburg, Kansas, United States
• Nittany Eye Associates — State College, Pennsylvania, United States

• Dougherty Laser Vision — Camarillo, California, United States
• Harvard Eye Associates — Laguna Hills, California, United States
• Coastal Vision — Newport Beach, California, United States
• Jon G. Dishler, M.D. — Greenwood Village, Colorado, United States

• Cleveland Clinic — Cleveland, Ohio, United States

Not specified