Summary
PURPOSE: Blue-filter intraocular lenses (IOLs) might inhibit the phototoxic effect of blue light on the macula and therefore reduce the risk of developing age related macular degeneration. Yellow IOLs might decrease contrast sensitivity and colour vision under mesopic conditions. Photochromatic IOLs are clear under mesopic and scotopic conditions and turn yellow under photopic conditions. This study was performed to compare patients receiving clear, yellow and photochromatic IOLs. PATIENTS AND METHODS: 45 patients were analyzed retrospectively after an uncomplicated phacoemulsification and implantation of three different kinds of IOLs: AF-1 UY (yellow, n = 14, Hoya Japan), AF-1 UV (clear, n = 17, Hoya Japan) and Aurium (photochromatic, n = 14, Medennium USA). Patients were investigated for best corrected spectacle visual acuity (BCSVA) and contrast sensitivity (Pelli Robson charts) under photopic and mesopic conditions (in 3 and 6 meter), photopic color vision and spherical aberrations. All investigations were done three months after cataract surgery. RESULTS: There was a trend for a better mesopic best corrected visual acuity in patients with photochromatic IOLs compaired to patients with yellow IOLs (p = 0.06). There was no significant difference between the patients in terms of photopic BCSVA, contrast sensitivity, colour vision or spherical aberrations. CONCLUSION: Although there was no statistical significant difference between the three types of IOLs, we could see a trend for a better mesopic best corrected visual acuity in patients with the photochromatic IOL compaired to the yellow IOL. Further studies with a larger numbers of patients are needed to confirm this trend.
Zusammenfassung
HINTERGRUND: Intraokularlinsen (IOL) mit Blaulichtfilter könnten die Netzhaut vor phototoxischem Effekt kurzwelligen UV Lichtes schützen und somit das Risiko für die Entwicklung beziehungsweise Verschlechterung einer Makuladegeneration reduzieren. Es besteht jedoch die Vermutung, dass es zu einem verminderten Farb- und Kontrastsehen unter mesopischen Lichtverhältnissen kommen könnte. Die photochromatische Intraokularlinse (IOL) ist transparent unter mesopischen und gelb unter photopischen Bedingungen. In dieser Studie wurde die Sehqualität von Patienten mit klaren, gelben und photochromatischen IOLs verglichen. PATIENTEN UND METHODEN: 45 Patienten mit komplikationsloser Phakoemulsifikation und drei unterschiedlichen IOLs wurden drei Monate postoperativ retrospektiv untersucht: AF-1 UY (gelb, n = 14, Hoya Japan), AF-1 UV (klar, n = 17, Hoya Japan) und Aurium (photochromatisch, n = 14, Aurium, Medennium USA). Drei Monate postoperativ wurden bestkorrigierter Visus (mesopisch und photopisch), Kontrastsehen (mesopisch und photopisch), Farbsehen und sphärische Aberration überprüft und verglichen. ERGEBNISSE: Im Vergleich zu Patienten mit einer gelben IOL zeigten jene mit einer photochromatischen Linse einen Trend, aber keinen statistisch signifikanten Unterschied für einen besseren brillenkorrigierten Visus unter mesopischen Lichtbedingungen (p = 0.06). Sowohl das Kontrastsehen unter photopischen und mesopischen Lichtbedingungen, als auch das Farbsehen wiesen keinen signifikanten Unterschied auf. SCHLUSSFOLGERUNG: Patienten mit einer photochromatischen IOL zeigten zwar keinen statistisch signifikanten Unterschied hinsichtlich mesopischer Sehqualität verglichen mit Empfänger gelber Linsen, aber es war ein Trend zu beobachten und weitere Studien mit einer höheren Patientenfallzahl sind notwendig, um diesen Trend zu bestätigen.
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Wenzl, E., Wohlfahrt, C., Vidic, B. et al. Farbsehen und Kontrastsehen mit photochromatischer IOL. Spektrum Augenheilkd. 23, 17–20 (2009). https://doi.org/10.1007/s00717-009-0311-3
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DOI: https://doi.org/10.1007/s00717-009-0311-3