aberrometry
Aberrometry
(This examination is part of the initial diagnostic work-up)
Aberrometry is a diagnostic method that makes it possible to identify optical distortions (aberrations) present in the human visual system, both lower-order (myopia, hyperopia and astigmatism) and higher-order. The presence or absence of such aberrations determines the qualitative characteristics of vision.
An aberrometer is a device that objectively detects possible image distortions in the human eye by measuring the wavefront. With its help, not only corneal refraction is measured, but the optical properties of the entire visual system. Using an infrared laser, light impulses are directed into the eye in the form of a wavefront. The light waves are fully or partially reflected from the retina and recorded by the device. Changes in the wavefront correspond to existing irregularities of the cornea.
With a directed “wavefront”, an additional measurement is carried out of the individual deviations of the light rays entering and leaving the eye. Based on this, modulation of the optical surface can be adjusted. Thus, wavefront analysis is one of the individualized methods of improving visual quality. When it is used, not only coarse aberrations such as hyperopia, myopia and corneal curvature are taken into account, but also very subtle deviations from the accepted norm.
