CHANGES IN OCULAR ABBERATIONS AND RETINAL IMAGE QUALITY USING RAY TRACE TECHNIQUE AFTER CATARACT SURGERY.

Document Type : Preliminary preprint short reports of original research

Authors

1 Department of Ophthalmology, Faculty of Medicine, Alexandria University

2 Department of Ophthalmology, Faculty of Medicine, University of Alexandria

Abstract

The surgery of cataract is challenging in all the world as cataract itself is one of the most common reason of blindness and it comes as number two in the causes of vision impairment. Dysfunctional Lens Syndrome is the crystalline lens changes that took place lens due to age changes.
The dysfunctional lens index is measurement of how the lens is performing objectively.
A ray-tracing aberrometry system can measure (DLI) in patients with nuclear cataracts.
The wave front analysis main function is isolating lower order aberrations effect and higher order aberrations, in addition to the contribution of the aberrations on optical quality. The optical system quality parameters include the Strehl ratio, (PSF), and (MTF).
Point Spread Function is defined as spatial light that is distributed from a point source imaged on the retina.The modulation transfer function is contrast of image divided by the contrast of object.

AIM:
To study the changes in ocular wavefront aberrations and the effect on retinal image quality post phacoemulsification in senile cataract patients using iTrace® wavefrontaberrometer.

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