DEMO — fictional range. Local brief only, NOT SENT. No personal data is collected or transmitted.
DOCUMENTS
What travels with a batch of frames.
A frame order arrives with paperwork or it arrives as a bag of parts. These are the documents worth asking for, and what each one establishes.
- Material declaration
- Frame material and lens material, because both decide the impact result
- Impact certificate
- Which standard, and on which lens and thickness
- Base curve record
- The curve as made, because it limits the prescription
- Prescription range
- What the frame accepts, stated rather than inferred
- Coating specification
- Which layers, in what order, and the adhesion result
- Balance record
- Where the mass sits, because it decides whether the frame moves
- Revision statement
- Which revision the batch was made to, and its prescription range
- Case specification
- Shell and lining, because the lining touches the coating
An illustrative list for a fictional range. A real programme agrees which documents are required, in what form, and how long they are retained.
The one that is most often missing.
The prescription range. A frame has a curve that limits what can be cut into it, and a document that omits the limit leaves the dispenser to discover it at the edging bench.
Why the impact certificate names a thickness.
Because impact is a property of material and thickness together. A certificate for a lens at one thickness does not describe the same lens ground thinner.