Progressive-toric IOL design reduces residual astigmatism with increasing pupil size

• Verfasst von: Łabuz, Grzegorz [VerfasserIn]
• Verfasst von: Vàradi, Dorottya [VerfasserIn]
• Verfasst von: Khoramnia, Ramin [VerfasserIn]
• Verfasst von: Auffarth, Gerd U. [VerfasserIn]
• Titel: Progressive-toric IOL design reduces residual astigmatism with increasing pupil size
• Titelzusatz: a ray-tracing simulation based on corneal topography data
• Verf.angabe: Grzegorz Łabuz, Dorottya Varadi, Ramin Khoramnia, Gerd U. Auffarth
• E-Jahr: 2021
• Jahr: 23 Feb 2021
• Umfang: 9 S.
• Teil: volume:12
• Teil: year:2021
• Teil: number:3
• Teil: pages:1568-1576
• Teil: extent:9
• Fussnoten: Gesehen am 21.05.2021
• Titel Quelle: Enthalten in: Biomedical optics express
• Ort Quelle: Washington, DC : OSA, 2010
• Jahr Quelle: 2021
• Band/Heft Quelle: 12(2021), 3, Seite 1568-1576
• ISSN Quelle: 2156-7085
• DOI: doi:10.1364/BOE.417894
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1758362693

Abstract

Population studies indicate that astigmatism decreases from the corneal center toward the periphery. A standard toric intraocular lens (IOL) with a constant cylinder power cannot correct uniformly across this gradient. We built an astigmatic eye model based on corneal topography data. A progressive-toric lens with gradually decreasing cylinder power was compared with an identically designed lens but featuring conventional astigmatism correction. Residual astigmatism did not differ significantly (P=0.06) at 3 mm, and the Strehl ratio was identical for both lenses (0.51 ±0.15, P=0.88). At 5 mm, the progressive IOL yielded significantly lower residual astigmatism by 0.10 D (P<0.001). The Strehl ratio was 0.30 ±0.08 with the progressive and 0.29 ±0.08 with the standard lens (P<0.001). At 3 mm, the optical performance was comparable for both IOLs. However, at 5 mm, the progressive-toric was more effective in correcting astigmatism, and it yielded reduced residual astigmatism compared to a standard toric lens.