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Instrument assisted diagnostics – biometry, topography and wave‐front analysis
Author(s) -
Eppig T.,
Spira C.,
Seitz B.,
Szentmáry N.,
Langenbucher A.
Publication year - 2015
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2015.0002
Subject(s) - keratoconus , intraocular lens , centration , keratometer , corneal topography , astigmatism , medicine , optometry , wavefront , ophthalmology , intraocular lenses , optics , computer science , cornea , physics
Summary Patient selection and planning implantation of a toric intraocular lens requires sophisticated measurement of ocular biometry in order to facilitate a valid calculation of the implant. Biometric measurements such as videokeratometry or corneal tomography, may also assist in qualifying patients for toric lens implantation, e.g. detecting keratoconus, pellucide marginal degeneration or other contraindications. Keratometers mostly provide simulated keratometry values, which do not always reflect the amount of the regular astigmatism that could be corrected by a toric intraocular lens. Therefore, it is mandatory to differentiate between regular and irregular components of corneal astigmatism. Axial length measurements require additional attention, especially when using ultrasound biometry. Wave‐front analysis may advance assessment of centration and rotation errors of toric implants.