A LITTLE SCIENCE. A LOT OF POSSIBILITY.
Your prescription.
A whole new
point of view.
Rotate the lens. Explore its thickness. Try a tint, then see what happens when the light changes.
Explore the simulatorPick a colour. See the possibility.
Explore your lens in 3D
Explore lenses on their own or fitted into seven simple 3D frame designs.
Generic frame designs sized by A, B, ED and DBL. All thickness values are educational estimates.
Prescription
OS · Left eye
Enter monocular PD for each eye. HT is measured from the bottom boxing line and locates the optical center in this single-vision study. Progressive fitting-cross height is not equivalent.
Frame measurements · mm
Sports preset: 20° face-form wrap per side by default, with automatic or custom lens base curve. The aviator starts at 8°; other designs start at 6°. Visual frame wrap only; no prescription compensation is calculated. Rims follow the illustrated lens front curve.
A = lens width; B = lens height; ED = twice the longest radius from the boxing center; DBL = distance between lenses. A + DBL gives frame center distance. Rectangular outlines are adjusted to match A, B and ED. Round styles allow independent A, B and ED: unequal A and B create an oval, while ED adjusts the outline. Measurements size a generic shape; they do not replace a frame trace.
Automatic thickness checks both the center and the thinnest edge. You may increase it; lower values are corrected to the simulator minimum. Mounting limits are illustrative presets, not a manufacturing approval.
Drag or swipe to rotate • Arrow keys also rotate • Shape shown at true proportions
Required lens diameter
Estimated blank diameter from the simulated frame outline, PD and HT, including a 2 mm edging allowance.
Required diameter may exceed availability. Please contact the lab for verification.
Blue = thinner · Red = thicker. Both lenses use the same scale in millimetres. Colours show thickness, not lens tint.
Compare all indices
| Index | OD center / max edge | OS center / max edge |
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How this estimate works
Automatic mode uses an educational single-vision paraxial model. Custom mode uses spherical front and biconic rear sagittae with nominal thin-lens principal surface powers. Front base uses lens-clock 1.530 convention (radius = 530/base mm); material index changes its actual power. Radius/aperture checks reject unsupported surface geometry and flat/convex rear meridians. Custom thickness is recalculated from sampled sagittae. This remains an approximation: thickness-adjusted back-vertex power, aspheric optimization, optical performance and manufacturer blank availability are not validated. A feasible result is not a manufacturability guarantee. Thickness at a point = optical-center thickness minus [sphere × u² + (sphere + cylinder) × v²] / [2000 × (index − 1)], with distances in mm. Cylinder axes are mapped in front view. The lens-only mode is centered; frame mode uses monocular PD and HT to decenter each optical center within the aperture.
Simulator center floors: 2.0 mm for 1.50/1.56, 1.5 mm for higher indices. Edge floors: 1.0 mm full rim, 1.8 mm nylon, 2.2 mm rimless. The aperture interior and edge are sampled to set each recommendation, rounded up to 0.1 mm. User overrides can increase center thickness but cannot go below the calculated recommendation. Rx, index, frame, fitting or dimension changes restore automatic thickness. Index comparisons apply each eye’s additional thickness above each material’s own minimum.
Lens-only mode can optimize for diameter or cut down an 80 mm lens without changing its original center thickness. Frame mode optimizes separately for each fitted shape; diameter controls do not apply. The illustrative front curve adapts to the strongest principal power so the back stays concave in both meridians (meniscus form). This is a visual approximation, not a laboratory base-curve calculation. Bevel position, wrap and frame depths are illustrative. No progressive, prism, or vision-through-the-lens simulation is calculated. Actual thickness and mounting suitability require laboratory confirmation. Calculations run in your browser. Save on this device stores the simulation locally; share links and downloaded summaries include the prescription and measurements.
All seven generic frame models were created for this simulator; they do not represent a manufacturer’s frame. Colours are illustrative and not transmission measurements.
Make it thinner
Explore a higher index or a smaller, newly optimized lens. Each option uses the recommended minimum thickness. Estimates only.
Save & share
Shared links and downloaded summaries include the prescription and measurements. Share only with people you choose. Saving on this device uses this browser only.