Caledonian Optical has partnered with Shaw Lens to bring optometrists Shaw's “Binocular by Design” technology, a major lens innovation since the introduction of freeform digital lenses. Shaw's patented enhancement addresses the therapeutic requirements for patients with strabismus, amblyopia, anisometropia, post-surgical refractive error, concurrent contact lens wear or just general dissatisfaction with glasses, especially progressives. The technology is said to eliminate the aniseikonia and anisophoria typically experienced by glass users wearing ordinary freeform, aspheric or conventional lens therapies. By using doctor measured motor fusion (vergence) limits and sophisticated maths, Shaw creates lenses that take into account how the eyes move together as they balance the image sizes. This overcomes many distortion problems and as a result, many patients report better vision comfort and fewer headaches.