Freeform spectacle lenses (FFLs) offer improved peripheral optics, faster adaptation, and higher patient satisfaction compared with aspheric lenses (ASLs), according to a review of more than 90 studies evaluating modern lens design performance.
Findings were grouped into optical performance, visual function, subjective outcomes, and practical considerations to compare ASLs and FFLs.
Both ASLs and FFLs were found to outperform traditional spherical lenses in central vision. However, FFLs consistently demonstrated superior peripheral performance, including lower peripheral astigmatism, reduced mean power error, and wider usable fields of view, particularly in progressive addition lenses. Freeform spectacle lenses also showed improved contrast sensitivity under mesopic and low-contrast conditions.
Personalization of position-of-wear parameters, such as vertex distance, pantoscopic tilt, and frame wrap, was identified as a key factor driving the performance advantages of FFLs, which were associated with faster adaptation and greater patient satisfaction, particularly in complex prescriptions and progressive lenses.
Aspheric lenses were noted to be a more cost-effective option for patients with moderate prescriptions and standard fittings, whereas FFLs were characterized as the preferred option for personalized spectacle correction when precise measurements and manufacturing are achieved.
Reference
Ladopoulos K, Pateras E, Ninos G. Freeform vs. Aspheric Spectacle Lenses: A Comprehensive Review of Optical Performance, Clinical Outcomes, and Patient Considerations. Cureus. 2026;18(2):e104008. doi: 10.7759/cureus.104008. PMID: 41878179; PMCID: PMC13006856.
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