: Eyes vary in curvature and diameter; a "one-size-fits-all" lens can cause scratches, ulcers, or infections.
: A professional fitting ensures the lens allows enough oxygen to reach the eye. Where You Can Buy Lenses (With a Prescription)
: Stores like Walmart Contacts can verify your prescription directly with your doctor.
: Many sites like LensDirect or Warby Parker allow you to upload a scan or photo of your prescription.
