Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 2 de 2
Filter
1.
Ophthalmologe ; 113(3): 217-22, 2016 Mar.
Article in German | MEDLINE | ID: mdl-26758279

ABSTRACT

BACKGROUND: A hyperopic shift, i.e. a shift of refraction in the direction of plus values, in Descemet membrane endothelial keratoplasty (DMEK) is a well-known phenomenon. Because of the need to select an appropriate intraocular lens power this becomes particularly relevant in triple DMEK, which is a combination of DMEK and cataract surgery. OBJECTIVES: In this study the refractive changes induced by triple DMEK were evaluated. The underlying mechanisms were classified based on corneal topographical data. MATERIAL AND METHODS: The study involved a retrospective evaluation of 29 eyes from 26 patients who underwent triple DMEK. The preoperative and postoperative refractions were compared with the initially desired target refraction. Calculations concerning refractive power were performed using corneal topographical data and the Gullstrand formula. RESULTS: On average a hyperopic shift was observed. The operation led to steepening of the posterior corneal surface and flattening of the anterior corneal surface. Both resulted in a reduction of corneal refractive power but changes of the posterior corneal surface were identified as the most important factor. Those patients in whom both eyes had been operated on, showed very similar postoperative topography for both eyes, irrespective of the preoperative values. CONCLUSION: The observed hyperopic shift was a mean value. A prediction of refraction in the individual cases by means of the available parameters was not possible. In general, the selection of an intraocular lens with a stronger myopic target refraction than that for standard cataract surgery is recommended.


Subject(s)
Cataract/therapy , Combined Modality Therapy/methods , Descemet Stripping Endothelial Keratoplasty/methods , Lens Implantation, Intraocular/methods , Phacoemulsification/methods , Refractive Errors/prevention & control , Aged , Cataract/complications , Cataract/diagnosis , Humans , Male , Monitoring, Intraoperative/methods , Refractive Errors/diagnosis , Refractive Errors/etiology , Retrospective Studies , Treatment Outcome , Visual Acuity
SELECTION OF CITATIONS
SEARCH DETAIL
...