Spanish optical retailer VisionLab has begun offering progressive lenses made with IOT's Light-Form technology. This is more significant than a laboratory demonstration: a customised optical product has reached consumer sale. Public evidence, however, comes mainly from IOT and VisionLab; no independent optical-performance study, yield data or long-term wear results have been published.

It is not built layer by layer

Light-Form uses stabilised frontal photopolymerisation. A controlled light pattern drives polymerisation so the lens volume forms continuously rather than as stacked layers. IOT says this avoids stair steps, pixel effects and optical discontinuities that have limited conventional layerwise photopolymerisation for prescription lenses.

A custom geometry is calculated for each order. Remaining material is recovered after the target volume forms, and a final cure completes the process. The developer says conventional surfacing, polishing and process water are eliminated. That does not mean the whole pair of spectacles requires no finishing: edging, frame fitting, coatings, measurement and order identification can remain separate operations.

Capacity and prescription coverage

IOT's technical blog states that a 15-square-metre cell operated by one or two people can produce 60 lenses per hour. It says the process covers about 85% of common prescriptions and explicitly does not replace all conventional manufacturing. These are vendor figures; cleaning, inspection, material change, uptime and yield within the stated throughput are not public.

Launch materials also claim no process water, 90% less energy and 76% less waste than traditional manufacturing. Assessing those numbers requires a defined reference route, system boundary, prescription range, reject rate and measurement method. Until those are disclosed, they are corporate performance claims rather than independent life-cycle results.

Why a progressive lens is demanding

Optical power changes continuously across a progressive lens, so making a smooth transparent object is insufficient. A surface calculated from prescription, pupil distance, fitting height, frame angle and wearer parameters must preserve intended performance across optical zones. Commercial launch shows that VisionLab connected the process to ordering and fitting, but it does not replace independent wavefront, power, prism, coating and durability tests.

Editorial conclusion

Light-Form is an interesting additive branch because it changes the physical formation route instead of merely increasing layerwise resolution. VisionLab's launch is evidence of commercial usability, not final validation of every environmental and quality claim. Independent optical comparison, full prescription coverage and real operating yield are the next meaningful milestones.