Changes of Macular Vasculature After Uncomplicated Phacoemulsification Surgery Using Optical Coherence Tomography Angiography

A prospective study of 30 patients with senile or complicated cataract scheduled to do phacoemulsification surgery in Tanta University Hospital

Two groups will be divided:

1. Group (1): Cataract will no diabetic retinopathy
2. Group (2): Cataract associated with diabetic retinopathy.

All patients will be subject to Full ophthalmologic examination before the surgery. Imaging will include OCTA. OCTA will be performed using cirrus OCT (Zeiss, Inc., USA). High-quality 6 x 6 mm OCTA macular scans and 3 × 3-mm papillary scan with strong signal-noise ratio with adequate centration on the fovea and optic nerve head respectively will be selected.

Segmentation will be used to evaluate superficial and deep capillary retinal plexus projections in addition to the choriocapillaries. If errors in segmentation were detected, manual correction would be performed. The superficial retinal capillary plexus (SCP) will be delineated with an inner boundary at the internal limiting membrane (ILM) and an outer boundary 10 µm inside the inner plexiform layer (IPL). The deep retinal capillary plexus (DCP) will be segmented with an inner boundary 10 µm inside the IPL and an outer boundary at 10 µm beneath the outer plexiform layer (OPL).