The right contact lens is out there.

CooperVision’s cross-cylinder calculator will help fit your astigmatic patients accurately and efficiently. Start by entering the spectacle and lens prescriptions and over-refraction. Then indicate the lens rotation, direction, and vertex distance. We’ll recommend a prescription and confirm that it agrees with the original spectacle correction.

Look up calculator

Crossed cylinder calculator

  • Spectacle Correction
  • +20.00 to -30.00
  • +20.00 to -20.00
  • 0 to 180
Enter spectacle correction in minus cylinder format
  • Contact Lens Correction
  • +20.00 to -30.00
  • +20.00 to -20.00
  • 0 to 180
Enter contact lens correction in minus cylinder format
  • Over Refraction Correction
  • +20.00 to -30.00
  • +20.00 to -20.00
  • 0 to 180
Enter spectacle over-refraction in minus cylinder format
  • Enter rotation in degrees
  • Enter direction of rotation
  • Adjust as needed
Reset

Suggested lens power

  • Sphere 0.00
  • Cylinder 0.00
  • Axis x0