Amr Hafez

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As narrowband off-chip RF filtering is not compatible with the concept of software defined radio (SDR), an SDR receiver must be designed to tolerate large out-of-band blockers with minimal gain compression and noise figure degradation. A recent circuit [1] tackles this problem by dispensing with the LNA entirely. This mixer-first approach achieves(More)
PURPOSE To assess the relationship between postoperative endothelial cell loss and microcoaxial phaco parameters using Ozil IP (Alcon Laboratories, Inc, Fort Worth, TX) in noncomplicated cataract surgery. METHODS In this prospective observational study, 120 consecutive cases of cataract patients with different grades of nuclear hardness underwent(More)
PURPOSE The aiming was to study the long-term clinical outcome and the merit of the author's modification of the fox's procedure. METHODS Mersilene mesh brow suspension (MMBS) procedure was performed in 50 upper lids with severe blepharoptosis and poor levator function. RESULTS The improvement in lid height was evaluated by preoperative and(More)
PURPOSE To evaluate the results of reconstruction of large defects in the upper lid using two composite contra-lateral eyelid margin grafts. METHODS This is an interventional case series in which a large full thickness defect of the upper lid was reconstructed in 7 patients using two composite eyelid margin grafts and myocutaneous advancement. The grafts(More)
PURPOSE This study compared the efficacy of single-injection percutaneous peribulbar anesthesia (PBA) with a short needle with sub-Tenon's anesthesia (STA) to produce optimal operating conditions for cataract extraction in patients with complicated cataract. METHODS Two hundred patients with complicated cataract were enrolled in this prospective,(More)
Since the 1950s, clinicians have relied on various formulations of Ca(OH)2 to stimulate dentin bridge formation. Various studies (Kozlov and Massler, 1966; Massler, 1967; Brännström, 1978; Cox et al., 1987; Snuggs et al., 1993) have demonstrated that pulp healing and dentin bridging can occur against a pH spectrum of materials. Recent studies (Akimoto et(More)
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