STANDARD KERATOMETRY COMPARED TO TOTAL KERATOMETRY IN TORIC INTRAOCULAR LENS CALCULATION BY A SWEPT SOURCE OPTICAL COHERENCE TOMOGRAPHY BIOMETER

Document Type : Preliminary preprint short reports of original research

Authors

1 Ophthalmology department, faculty of medicine, Alexandria University, Alexandria, Egypt

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

Abstract

Cataract surgery has progressed from a basic operation to correcting all refractive problems in addition to removing the clouded crystalline lens. allowing for a complete restoration of vision with high degrees of spectacle independence.
Astigmatism is a meridian-dependent refractive defect that affects the majority of people's eyes.Some studies have shown that 30%, 22% and 8% of patients with cataract have more than 0.75 diopters (D), 1.50 D and 2.00 D of corneal astigmatism, respectively.
In the current phacoemulsification era, the most frequent approach for treating pre-existing corneal astigmatism is to implant toric intraocular lenses (IOLs).
Optical biometry has shown to be more accurate and safer than ultrasonic biometry for biometric measurement of the eye. As a result, optical biometry has grown increasingly popular. Among them, is IOL Master 700 based on SS-OCT which has of measuring the Total Keratometry (the anterior and posterior surfaces of the cornea).
Aim of the work:
The aim of the work was to compare the standard keratometry to total keratometry in toric intraocular lens calculation by a swept source optical coherence tomography biometer.

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