Extended Depth of Focus Intraocular Lenses in Cataract Surgery

oftalmoloji-17-1-kapak-wosonayiyok

İzzet CANa

aPrivate Physican, Ankara, Türkiye

ABSTRACT
Cataract surgery is becoming an increasingly common method for the treatment of presbyopia. In recent years, very successful visual results have been reported, especially with trifocal intraocular lenses (IOL). However, dysphotopsia and contrast sensitivity (CS) loss are the leading causes of dissatisfaction with these lenses. In addition, there are some absolute or relative contraindications for using these lenses in some comorbidities such as macular, corneal diseases and glaucoma. Recently, extended depth of focus (EDOF) lenses seem to be a promising solution against these problems. Unlike multifocal IOLs, EDOF lenses create a single, elongated focal point instead of multiple foci to enhance depth of focus (DoF). Since there will be no overlapping out-of-focus images, it can be considered that dysphotopsia problem are mostly avoided. Despite these advantages, EDOF lenses can also cause CS loss and insufficiency for near vision. In this article, the issues of EDOF classification, which have not yet been clarified, DoF enabling methods, especially spherical aberration (SA), differences between hybrid and pure EDOF lenses, mini-monovision (MMV) method applied with EDOF lenses to solve near vision and near spectacle dependence problems are discussed.
Keywords: Presbyopia correcting IOLs; EDOF IOLs; EDOF classification; non-diiffractive EDOF IOLs; spherical aberration; mini-mono vision; vision disorders; lenses

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