Publications by authors named "Omar M Hassan"

6 Publications

  • Page 1 of 1

Acute macular neuroretinopathy associated with acute promyelocytic leukemia.

Am J Ophthalmol Case Rep 2021 Jun 25;22:101044. Epub 2021 Feb 25.

Department of Ophthalmology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.

Purpose: To describe the first reported case of acute macular neuroretinopathy (AMN) associated with acute promyelocytic leukemia in a young Asian-Indian male.

Observations: We review the clinical and multimodal imaging findings in our patient that are characteristic of AMN.

Conclusions And Importance: Ophthalmologists should be aware of the association of leukemia with AMN and consider hematologic work-up when assessing patients with AMN without the prototypical history or risk factors.
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http://dx.doi.org/10.1016/j.ajoc.2021.101044DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7933699PMC
June 2021

scolicidal activity of synthesised silver nanoparticles from aqueous plant extract against .

Biotechnol Rep (Amst) 2020 Dec 22;28:e00545. Epub 2020 Oct 22.

Department of Physics, College of Science, University Of Anbar, Ramadi, 30001, Iraq.

At present, biosynthesis of AgNPs is a very effective method to produce less toxic nanoparticles. The vision of this research is to use three different plant extracts derived from leaves of , and for rapid biosynthesis of AgNPs. This is in addition to investigating the scolicidal activity against . The methods of UV-vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray analysis (EDX) were employed to characterise the nanoparticles. UV spectra disclosed a maximum absorption at 437 nm for the biosynthesised AgNPs using EUCGLO extract. The XRD patterns revealed the (fcc) structure of the AgNPs with slightly shifted characteristic peaks at 2θ degree of 37.3˚ and 43.4˚, respectively. The scolicidal activity against revealed that the AgNPs, which were synthesised using , have powered scolicidal of 47.8 % after 45 min. which is comparable to the treatment by Albendazole.
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http://dx.doi.org/10.1016/j.btre.2020.e00545DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7610041PMC
December 2020

Management of Congenital Aniridia-Associated Keratopathy: Long-Term Outcomes from a Tertiary Referral Center.

Am J Ophthalmol 2020 02 12;210:8-18. Epub 2019 Nov 12.

Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA. Electronic address:

Purpose: To report the outcomes of medical and surgical management for congenital aniridia-associated keratopathy (AAK) over a long-term follow-up period.

Design: Retrospective, comparative case series.

Methods: Medical records of patients diagnosed with congenital aniridia were retrospectively reviewed. Age, sex, ethnicity, follow-up time, AAK stage, noncorneal abnormalities, ocular surgeries, and complications were recorded. The visual acuity equivalent (VAE), approximate Early Treatment Diabetic Retinopathy Study (appETDRS) letter score, was calculated using recorded Snellen visual acuities.

Results: A total of 92 eyes of 47 patients (31 females) with mean age of 48.0 ± 18.0 years and mean follow-up of 78.6 ± 42.2 months were included. At the initial visit, 12 eyes (13%) were classified as Stage I AAK, 33 eyes (35.9%) were Stage II, 25 eyes (27.2%) were Stage III, 17 eyes (18.5%) were Stage IV, and 5 eyes (5.4%) were Stage V. Limbal stem cell transplantation (LSCT) and Boston keratoprosthesis (KPro) were frequently performed in eyes with Stages III-V. These advanced corneal surgeries significantly improved the median (95% confidence interval [CI]) of calculated appETDRS scores from 2 (0-20) to 26 (15-41) (Snellen values, 20/20,000 to 20/300; P = 0.0004). Patients with earlier Stages (I-II) of AAK were managed medically and had stable visual acuity through their final visits (appETDRS score of 26 [20-35] to 35 [26-35]; Snellen, 20/300 to 20/200; P > 0.05). The appETDRS VAE was significantly improved from 20 (0-35) to 30 (20-55), Snellen, 20/400 to 20/250, following LSCT (P = 0.021) and from 2 (0-20) to 2 (0-41) after KPro; Snellen, 20/20,000 VAE but with improved 95% CI after follow-up (P = 0.019).

Conclusions: With proper characterization and staging of AAK, individualized medical and advanced surgical interventions preserves and improves visual acuity.
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http://dx.doi.org/10.1016/j.ajo.2019.11.003DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6964251PMC
February 2020

Young Man With Severe Bilateral Papilledema.

JAMA Ophthalmol 2018 07;136(7):831-832

Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago.

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http://dx.doi.org/10.1001/jamaophthalmol.2017.6652DOI Listing
July 2018

Progressive Bilateral Scleral Pigmentation in a Patient With Ocular Hypertension.

JAMA Ophthalmol 2018 05;136(5):587-588

Department of Ophthalmology and Visual Sciences, University of Illinois College of Medicine, Chicago, Illinois.

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http://dx.doi.org/10.1001/jamaophthalmol.2017.5148DOI Listing
May 2018

Management of Corneal Scarring Secondary to Herpes Zoster Keratitis.

Cornea 2017 Aug;36(8):1018-1023

*Department of Ophthalmology and Visual Sciences, University of Illinois Eye and Ear Infirmary, Chicago, IL; †Department of Ophthalmology and Visual Science, University of Chicago, Chicago, IL; and ‡Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, MN.

Purpose: To review the management of visually significant corneal scarring secondary to herpes zoster keratitis (HZK).

Methods: Literature review.

Results: Management options for visually significant corneal scarring secondary to HZK include scleral contact lenses, photorefractive or phototherapeutic keratectomy, lamellar keratoplasty, penetrating keratoplasty, and keratoprosthesis. Many authors recommend tarsorrhaphy in at-risk patients at the time of corneal transplantation. Most published studies either did not mention or did not use systemic antivirals at the time of surgery. Longer quiescent periods before surgical intervention may be associated with increased rates of graft survival. Reports of HZK recurrence after live-attenuated vaccine administration suggest that risks and benefits of the vaccine should be carefully considered. Overall, the prognosis of surgical intervention for corneal scarring due to HZK relies on appropriate patient selection and measures to ensure ocular surface stability. There remains a serious risk of ocular surface instability and corneal melt in these patients. Unfortunately, there is a lack of prospective studies in this area to guide clinical management.

Conclusions: Patients with visually significant corneal scarring secondary to HZK may have good outcomes with the appropriate medical and surgical considerations, particularly in the absence of active ocular surface disease and inflammation. Those with active disease may benefit from delaying surgical intervention until a satisfactory quiescent period has been achieved. Prospective studies, such as the proposed Zoster Eye Disease Study, are imperative for validating these principles and determining evidence-based management guidelines.
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http://dx.doi.org/10.1097/ICO.0000000000001235DOI Listing
August 2017