الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Since its introduction by Kelman phacoemulsification undergoes
continuous evolution in different aspects. Reduction of the ultrasound was the
main goal to protect the corneal endothelial cells and avoids too much heat
production. In the last decade energy reduction was achieved with the
modification in phaco technology and techniques. Continuous upgrading of the
fluidics of phaco machines had enabled the safe use of high vacuum and flow
rate levels. Power modulation and the popularity of the pulse and burst modes in
modern phaco machines had also added to energy reduction. Alternatively,
phaco techniques had been modified by shifting from sculpting. to phaco
chopping and eventually to techniques that utilize higher levels of vacuum for
nucleus disassembly and safe removal.
In this study, a comparison was made between Group (A) which
included 50 eyes who had phacoemulsification using bevel down quick-chop
phacoemulsification technique and Group(B) which included 50 eyes who had
phacoemulsification using the stop and chop phacoemulsification technique.
The two groups were compared in terms of equivalent ultrasound time,
the effect on corneal endothelium, efficiency, in different grades of nuclear
hardness, intraoperative difficulties, complications and advantages.
The mean equivalent ultrasound time in group A was 30.94 ± 11.913
seconds, in group B the mean equivalent ultrasound time was 36.18 ± 11. 992
seconds. The quick chop technique was effective in reducing the mean