Entwicklung einer neuen Methode zur Objektivierung von Dysphotopsieeffekten

Die Glare-Perimetrie ist eine neue Testmethode zur Quantifizierung von Blendungsphänomenen, wie sie vorrangig nach Katarakt-Operation angegeben werden. Diese Arbeit befasst sich zum einen mit der Beschreibung der Methode, zum anderen mit ihrer Anwendung an Patienten mit Kunstlinsen bei Zustand nach Katarakt-Operation und Probanden mit der natürlichen, klaren Linse als Kontrollgruppe. Die ermittelte Blendempfindlichkeit war in der ersten Gruppe höher und zeigte vor allem eine hohe Korrelation mit dem Visus, eine mittlere Korrelation mit dem Alter und eine binokulare Summation

Presbyopia:Effectiveness of correction strategies

Presbyopia is a global problem affecting over a billion people worldwide. The prevalence of unmanaged presbyopia is as high as 50% of those over 50 years of age in developing world populations due to a lack of awareness and accessibility to affordable treatment, and is even as high as 34% in developed countries. Definitions of presbyopia are inconsistent and varied, so we propose a redefinition that states “presbyopia occurs when the physiologically normal age-related reduction in the eye's focusing range reaches a point, when optimally corrected for distance vision, that the clarity of vision at near is insufficient to satisfy an individual's requirements”. Presbyopia is inevitable if one lives long enough, but intrinsic and extrinsic risk factors including cigarette smoking, pregnancy history, hyperopic or astigmatic refractive error, ultraviolet radiation, female sex (although accommodation is similar to males), hotter climates and some medical conditions such as diabetes can accelerate the onset of presbyopic symptoms. Whilst clinicians can ameliorate the symptoms of presbyopia with near vision spectacle correction, bifocal and progressive spectacle lenses, monovision, translating or multifocal contact lenses, monovision, extended depth of focus, multifocal (refractive, diffractive and asymmetric designs) or ‘accommodating’ intraocular lenses, corneal inlays, scleral expansion, laser refractive surgery (corneal monovision, corneal shrinkage, corneal multifocal profiles and lenticular softening), pharmacologic agents, and electro-stimulation of the ciliary muscle, none fully overcome presbyopia in all patients. While the restoration of natural accommodation or an equivalent remains elusive, guidance is gives on presbyopic correction evaluation techniques