Home

Free-form progressive lenses fail quality control for a recognizable set of reasons: the produced surface deviates from the design file because of tool wear, material variation, thermal effects, or process drift; the corridor is mispositioned or has the wrong power progression; peripheral astigmatism exceeds design limits; localized defects such as optical islands or edge artifacts appear; or the lens is measured under conditions that make a conforming lens appear non-conforming.

The best way to map optical power across a progressive lens is full-surface wavefront sensing, which captures the complete power distribution in a single measurement rather than sampling isolated points.

To verify a progressive lens against its design file, measure the produced lens with a full-surface power mapping system, load the intended design file, and let the system generate a difference map showing where the measured lens deviates from the design.

To verify a progressive lens against its design file, measure the produced lens with a full-surface power mapping system, load the intended design file, and let the system generate a difference map showing where the measured lens deviates from the design.

The best IOL measurement solution is not a single instrument but a coordinated capability covering the whole intraocular lens workflow: optical quality characterization for design and verification, model-eye measurement aligned with ISO 11979-2 configurations for regulatory-grade optical data, batch measurement for production throughput, and physical measurement of thickness and layer structure.

Lens thickness measurement determines the thickness of a lens – at its center, its edge, or across its whole surface. For flexible lenses such as soft contact lenses, thickness must be measured with a non-contact optical method, because mechanical gauges compress the lens and produce artificially low readings.