FREE · 1.0 RC4 BETA
Calculate. Troubleshoot. Reference.
Fast optical tools without patient profiles.
About Refralyx
Designed for opticians and optical professionals as a quick educational dispensing reference.
Educational-use disclaimer
Refralyx does not diagnose disease, prescribe treatment, replace an eye examination, or replace licensed clinical judgment. Verify calculations and recommendations according to practice, lab and manufacturer requirements.
Privacy summary
No patient profile is required. Do not enter names, DOBs, contact information or other identifying information.
Rx Analyzer
Calculators
Transpose Rx
Prentice's Rule
Minimum Blank Size
Troubleshooting Wizard
Lens Materials
CR-39 / Standard Plastic
1.50Good optical quality and affordability. Better suited to lower prescriptions when thickness is not a major concern.
Polycarbonate
1.59Very impact resistant and naturally UV protective. Common for safety, sports, and children's eyewear.
Trivex
1.53Impact resistant with good optical characteristics and low density. Often a strong choice for drilled or rimless frames.
High Index
1.67Useful when reducing thickness and weight matters, especially with stronger prescriptions and appropriately selected frames.
High Index
1.74Among the thinnest commonly available plastic lens materials. Often considered for very strong prescriptions.