Please note that this toolkit is still in beta testing stage
INSIGHT OPTICAL TRAINING · PROFESSIONAL TOOLS
Frame/Rx Suitability & Cut-out Tool
Assess frame geometry, minimum blank-size requirements and prescription-related dispensing considerations.
Frame measurements
Enter the boxing measurements from the frame. Use a traced ED where available.
AHorizontal boxed lens dimension, edge to edge at the widest point.
BVertical boxed lens dimension, edge to edge at the tallest point.
DBLDistance between lenses: the shortest horizontal distance between the two boxed lens shapes.
EDEffective diameter from a tracer or accurate frame-shape data. If unavailable, the tool can use a conservative box-diagonal estimate.
A branded visual measurement guide can be added here later.
Patient measurements
Use monocular distance PDs so right and left decentration are calculated independently.
Frame and lens selection
These selections are used for the suitability assessment. They do not replace manufacturer or laboratory requirements.
Vertical fitting
Enter fitting heights where relevant. For progressive and occupational lenses, use the monocular fitting height from the lowest point of the boxed lens shape to the fitting cross/pupil position. If the selected lens has a stated minimum fitting height, enter it for a direct check.
When fitting heights are entered, the cut-out estimate uses combined horizontal and vertical displacement from the boxing centre. This is a conservative geometric screening estimate, not a traced-shape glazing guarantee.
Prescription
Enter the distance prescription. Sphere and cylinder use 0.25 D steps and always display a sign. Axis accepts whole numbers from 1–180° and is disabled when cylinder is plano.
Sphere
Cylinder
Axis
Right
Left
FRAME / RX ASSESSMENT
Suitability and cut-out results
Overall assessment
—
Frame geometry
Vertical fitting geometry
R
Minimum blank requirement—
L
Minimum blank requirement—
Prescription profile
Dispensing considerations
Cut-out calculation: with fitting height entered, minimum blank size = ED + (2 × combined horizontal/vertical decentration) + safety allowance. Without fitting height, the tool uses horizontal monocular decentration only.
This tool is a dispensing aid, not a glazing guarantee or thickness calculator. It does not model actual frame shape, lens design, base curve, minimum centre/edge thickness, surfacing limits, groove/drill requirements or manufacturer-specific blank availability. Confirm the final specification with a tracer, the selected lens supplier and the glazing laboratory.