الفهرس 
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Abstract
Aim of the work
To study the role of the electroretinogram “ERG” and visual evoked potential “VEP” in preoperative assessment of retina and optic nerve functions in eyes of opaque media as an example (dense cataract).
Summary and conclusions
In this work 30 eyes with dense cataract were studied. VER and ERG were performed preoperatively and visual acuity was assessed postoperatively.
There was significant positive correlation between preoperative electrophysiological test results and visual acuity after surgery.
These results found basis for selection of cases of cataract suitable for surgery to get the best outcome.
We recommend doing preoperative electrophysiological studies for all cases of dense cataract undergoing surgery.