Ophthalmic Lab Technician how-to

How to Edge a Lens

Accurate edging fits frames.

Updated By the Career Education Institute Curriculum Team
Quick answer

Accurate edging fits frames. In short: trace; mark; block, then complete the remaining steps below.

Step by step

  1. Trace the frame.

  2. Mark the optical center.

  3. Block the lens.

  4. Run the edger.

  5. Check fit.

  6. Smooth edges.

Safety reminders for ophthalmic lab technicians

  • Wear eye protection
  • Handle chemicals safely
  • Guard machines
  • Follow impact testing rules

Lens blank · Surfacing · Edging · Sphere · Cylinder · Axis: see the full ophthalmic lab technician glossary.

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