Master Lab Calculator
Job Specs • Thickness • Frame Anatomy
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Job Specification
Tip: ED is the longest lens diagonal used to estimate blank size and thickness trend.
If you don’t know ED, you can estimate for many frames as ED ≈ A + 2 mm (simple quick estimate).
Live Results
Edge Thickness0.0 mm
Center Thickness2.0 mm
Min Blank Size (MBS)0 mm
Decentration (per eye)0 mm
Frame PD (A + DBL)0 mm
Lens Cross-Section
MBS: Minimum Blank Size = ED + 2×Decentration + safety margin.
Decentration: How much each lens must shift so the optical center matches the patient PD.
Decentration: How much each lens must shift so the optical center matches the patient PD.
Frame Anatomy Guide
A: Lens width (boxing system).
B: Lens height (boxing system).
ED: Effective Diameter (longest diagonal). Used for blank sizing/thickness trend.
DBL: Bridge distance between lenses.
B: Lens height (boxing system).
ED: Effective Diameter (longest diagonal). Used for blank sizing/thickness trend.
DBL: Bridge distance between lenses.
