Publications by authors named "Hytham Fayek"

3 Publications

  • Page 1 of 1

Short-Term Anterior Segment Changes After Nd-YAG Laser Posterior Capsulotomy in Pseudophakic Eyes with Fuchs' Endothelial Dystrophy.

Clin Ophthalmol 2021 30;15:1819-1825. Epub 2021 Apr 30.

Department of Ophthalmology, Faculty of Medicine, Benha University, Benha, Egypt.

Purpose: To describe the changes in the central corneal thickness (CCT), endothelial cell count (ECC), intraocular lens (IOL) position, and refractive error 1 and 3 months after Nd-YAG laser posterior capsulotomy (YAG-PC) for posterior capsular opacification (PCO) in pseudophakic eyes with Fuchs' endothelial cell dystrophy (FECD).

Design: Prospective case-control.

Participants: Fifty pseudophakic eyes of 50 patients with visually significant PCO (25 with healthy corneas, and 25 with FECD grade 1 and 2).

Methods: FECD was clinically graded, and only patients without clinically evident corneal edema were included in the study (grade 1 and 2). All patients received YAG-PC and were followed up after 1 and 3 months. Best-corrected visual acuity, refractive errors, ACD, CCT, and ECC were assessed and compared between the pre-laser values and that of the 2 follow-up visits.

Results: In both groups, BCVA showed significant improvement (P<0.05). Compared to healthy controls, a significant hyperopic shift was observed in the FECD eyes at the 2 follow-up visits (P=0.027, and 0.019). A significant backward movement of the IOL was observed in the FECD eyes in the 2 follow-up visits (P=0.043, and 0.02). There was a significant correlation between the hyperopic shift in the FECD eyes and the ACD deepening during the 1st month (R= -0.6, P=0.001) and 3rd month (R= -0.4, P=0.04). Significant drop in the ECC was noted in both groups but without significant increase in the CCT.

Conclusion: Compared to controls, a hyperopic shift and backward movement of the IOL were observed in the FECD eyes after YAG-PC. No significant corneal thickening was found in both groups despite the significant drop in the ECC. Future studies are required to confirm our results and monitor the long-term changes after YAG-PC in FECD.
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http://dx.doi.org/10.2147/OPTH.S305306DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8096438PMC
April 2021

Endoscopic assisted probing for symptomatic congenital nasolacrimal duct obstruction after one year of age.

Rhinology 2010 Mar;48(1):100-3

Faculty of Medicine, Otorhinolaryngology Department, Mansoura University, Mansoura, Egypt.

Purpose: When probing treatment for congenital nasolacrimal duct obstruction fails, it is often unclear whether it is due to technical difficulties or the severity of obstruction. Therefore our aim was to study the causes of probing failure and how to treat them.

Method: In a prospective study, 36 lacrimal systems of 26 children aged 12 months to 4 years with congenital nasolacrimal duct obstruction (CNLDO) were treated by probing. In all children probing was done under direct vision using nasal endoscopy. Different forms of CNLDO were treated and studied to determine the potential predictors for treatment failure.

Results: The overall success rate was 94.5 %. Expected failure was attributed mainly to the construction of different forms of membranous penetration on probing. Surgical membranotomy at the area of Hasner's valve under direct nasal endoscopic visualization is an essential step for proper management of CNLDO.

Conclusions: Nasolacrimal duct probing under direct nasal endoscopic visualization can be considered as the standard treatment of CNLDO as it minimizes intranasal trauma and leads to a better surgical outcome.
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March 2010

Rubber tube versus silicone tube at the osteotomy site in external dacryocystorhinostomy.

Orbit 2010 Apr;29(2):76-82

ENT Department, Mansoura University, Egypt.

Background: In external dacryocystorhinostomy a large bony window is created in the lateral nasal wall and a mucosal anastomosis is created between the lacrimal sac and the nasal cavity. The success of the operation depends on the surgical anastomosis remains patent and converting to a wide enough epithelial-lined passage.

Objective: To compare the efficacy of using rubber versus silicone tubes at the osteotomy of Dacryocystorhinostomy.

Design: Prospective, randomized, hospital-based study.

Subjects And Methods: 46 patients diagnosed with primary acquired nasolacrimal duct obstruction were assigned randomly to rubber, silicone or control group. The surgical procedures in the three groups were the same except that in patients of rubber and silicone groups, rubber or silicone tubes were placed at osteotomy opening and removed after 3 months. Transnasal endoscopic findings were recorded at the completion of surgery and at 3 months, 6 months and 9 monthes after surgery for the 3 groups. A computer aided digitizer was used to calculate the surface area of the osteotomy site.

Results: After removal of their tubes, 3 patients in the rubber group had recurrent epiphora (78.0% success), one patient in silicone group (92.86% success) and 4 patients in control group (77.8% success). The average final surface area of the osteotomy opening of patients with rubber group at the end of follow-up was (9.85 mm(2)) in the silicone group was (17.47 mm(2)), whereas in the control group was (8.56 mm(2)).

Conclusion: Silicone tube is better than rubber one in maintaining effective larger osteotomy after Dacryocystorhinostomy. This can improve the long-term success of the operation.
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http://dx.doi.org/10.3109/01676830903294891DOI Listing
April 2010