Accommodation and presbyopia
- 9 November 2008
- journal article
- abstracts
- Published by Springer Science and Business Media LLC in Der Ophthalmologe
- Vol. 105 (11), 1059-1074
- https://doi.org/10.1007/s00347-008-1861-5
Abstract
Bei der chirurgischen Presbyopiekorrektur werden 2 therapeutische Basisansätze unterschieden, die Vergrößerung der Schärfentiefe (z. B durch multifokalen Laserabtrag der Kornea) und die Wiederherstellung von Akkommodation im Sinne einer dynamischen Refraktionsänderung des Auges (akkommodative Intraokularlinsen, Skleraexpansion). Mit pseudoakkommodativen Verfahren lässt sich eine befriedigende Nahsehschärfe erreichen, jedoch müssen störende optische Phänomene und Schwächen im Intermediärbereich in Kauf genommen werden. Die Wiederherstellung der Akkommodation bereitet noch Probleme, u. a. auch, weil der Mechanismus der Akkommodation und die Entwicklung der Presbyopie noch nicht vollständig geklärt sind. Einige klinisch angewendete operative Verfahren beruhen auf Konzepten, deren Gültigkeit nicht nachgewiesen ist oder die experimentellen Ergebnissen widersprechen. Daher müssen die Resultate und Wirkmechanismen kritisch und objektiv überprüft werden. There are two basic approaches for the surgical correction of presbyopia: increasing depth of focus (e.g. by means of multifocal laser abrasion of the cornea), Or restoring accommodation in the sense of a dynamic change in ocular refraction (accommodative intraocular lenses, scleral expansion). Pseudoaccommodative procedures are able to achieve satisfactory near vision, albeit at the price of lower performance in the intermediate range and decreased image quality. The restoration of accommodation remains problematic, partly because the mechanism of accommodation and the development of presbyopia are still not fully understood. Some surgical procedures are based on concepts, the validity of which is not confirmed or which even contradict experimental evidence. Thus, it is necessary to assess the results and presumed mechanisms critically and objectively.Keywords
This publication has 106 references indexed in Scilit:
- Capsular bag refilling using a new accommodating intraocular lensJournal of Cataract & Refractive Surgery, 2008
- Comparing the 1CU Accommodative, Multifocal, and Monofocal Intraocular LensesOphthalmology, 2007
- Potential Effect on the Retinoscopic Reflex of Scleral Expansion Surgery for PresbyopiaOptometry and Vision Science, 2006
- Accommodative Lens Refilling in Rhesus MonkeysPublished by Association for Research in Vision and Ophthalmology (ARVO) ,2006
- European Multicenter Study of the AcrySof ReSTOR Apodized Diffractive Intraocular LensOphthalmology, 2006
- Magnetic Resonance Imaging Study of the Effects of Age and Accommodation on the Human Lens Cross-Sectional AreaPublished by Association for Research in Vision and Ophthalmology (ARVO) ,2004
- Polymer Refilling of Presbyopic Human Lenses In Vitro Restores the Ability to Undergo Accommodative ChangesPublished by Association for Research in Vision and Ophthalmology (ARVO) ,2003
- Theoretical Analysis of Accommodation Amplitude and Ametropia Correction by Varying Refractive Index in Phaco-ErsatzOptometry and Vision Science, 2001
- Scleral expansion surgery does not restore accommodation in human presbyopiaOphthalmology, 1999
- The mechanism of accommodation in primates11The authors have no commercial interests or conflict of interests with anything presented in this study.Ophthalmology, 1999