Clinical Focus

  • Ophthalmology

Academic Appointments

Professional Education

  • Fellowship: Magrabi Eye Hospital (2020) Egypt
  • Residency: Tanta University Hospital (2017) Egypt
  • Internship: Tanta University Hospital (2014) Egypt
  • Medical Education: Tanta University Faculty of Medicine (2014) Egypt

Clinical Trials

  • Methotrexate For The Prevention and Treatment of Proliferative Vitreoretinopathy in Pediatric Patients Not Recruiting

    Rhegmatogenous retinal detachment (RRD) is a sight-threatening condition. Children with RRD usually present late with clinical features of longstanding RRD, specifically a serious condition named: proliferative vitreoretinopathy (PVR). Therefore, children with RRD often have poorer outcomes. The objective of this study is to investigate the efficacy and safety of methotrexate in the treatment and prevention of PVR. Methotrexate is a medication that has been used to treat inflammatory conditions in children and adults for a long time and it has been recently used to treat PVR in adults.

    Stanford is currently not accepting patients for this trial. For more information, please contact Edward Wood, MD, 650-723-6995.

    View full details

All Publications

  • Immunotherapy-induced retinopathy mimicking cancer associated retinopathy. American journal of ophthalmology case reports Ghoraba, H., Or, C., Karaca, I., Mishra, K., Akhavanrezayat, A., Park, S., Than, N., Leung, L., Sanislo, S., Dong Nguyen, Q. 2022; 26: 101449


    Purpose: To report a patient who developed a cancer associated retinopathy (CAR) like syndrome in the setting of pembrolizumab and lenvatinib combination therapy for metastatic endometrial carcinoma. Symptoms resolved with normalization of objective functional tests following cessation of medications.Observations: A 52-year-old female with history of endometrial carcinoma, managed with pembrolizumab infusions and daily oral lenvatinib treatment for 18 months, presented to a tertiary eye center with complaints of nyctalopia, photosensitivity and photopsia. Further investigations revealed a reduction in b-wave amplitude on full field ERG (ffERG), a mild color vision deficit, and positive antiretinal antibodies against carbonic anhydrase II, enolase and arrestin. A preliminary diagnosis of CAR was made. One month following diagnosis, the patient discontinued both lenvatinib and pembrolizumab and subsequently reported significant improvement in her eye symptoms and vision. Repeat ffERG had normalized with a robust b-wave, with an improvement noted on repeat color vision testing. A presumed diagnosis of immunotherapy-induced retinopathy was made, with clinical findings mimicking CAR.Conclusions and importance: Pembrolizumab and lenvatinib treatment may be associated with a reversible retinopathy, with presentation very similar to CAR.

    View details for DOI 10.1016/j.ajoc.2022.101449

    View details for PubMedID 35265774

  • Novel surgical approach for removing intraretinal loculated foveal hemorrhage in a patient with hypertensive retinopathy. American journal of ophthalmology case reports Khojasteh, H., Akhavanrezayat, A., Ghoraba, H., Nguyen, Q. D. 2021; 24: 101217


    Purpose: To present a surgical approach for removing intra-retinal loculated foveal hemorrhage due to hypertensive retinopathy (HR) in a patient with uncontrolled hypertension (HTN).Observations: A 67-year-old man presented to a tertiary retina clinic with the complaint of decreased vision in his left eye (OS) for the past six months. He had a history of uncontrolled HTN, which caused HR; otherwise, his past medical and ocular history were insignificant. His best-corrected visual acuity (BCVA) was 20/20 right eye (OD) and 20/400 OS. Fundus examination of OD did not show significant pathology except mild arterial narrowing. Fundus examination of OS revealed arterial narrowing and multiple areas of small retinal hemorrhage. Old, organized hemorrhage with a yellow foveal centered lesion appearance was detected on fundus examination. Spectral-domain optical coherence tomography (SD-OCT) showed a dense hyper-reflective intra-retinal lesion at the fovea. Pars plana vitrectomy was performed. Internal limiting membrane (ILM) was stained with Brilliant Blue G (BBG) and peeled off around the lesion using ILM forceps. Attempts to remove the lesion with cannula-assisted active backflush and aspiration were unsuccessful. Therefore, the lesion was gently dissected and extracted by using 41-gauge needle. After removing the clot, the rotational ILM flap technique was used to repair the developed macular hole-like tissue defect. At the two-month follow-up visit, BCVA improved considerably to 20/50, and significant anatomical restoration was observed.Conclusion and Importance: HR is relatively common among patients with elevated blood pressure. To date, management of HR and its complications such as retinal hemorrhage is limited to non-surgical methods. For the first time, a surgical approach is utilized to manage one of the HR's complications with prominent visual and structural improvement. The index case report presents a new management option for hypertensive retinal hemorrhage, but only in appropriate patients with ocular indications and understanding of the potential adverse events associated with the surgical procedure.

    View details for DOI 10.1016/j.ajoc.2021.101217

    View details for PubMedID 34646960

  • Unilateral acute anterior uveitis with macular edema following the use of sildenafil citrate in a patient with HLA-B27 positivity. American journal of ophthalmology case reports Regenold, J., Ghoraba, H., Akhavanrezayat, A., Matsumiya, W., Mobasserian, A., Karaca, I., Zaidi, M., Pham, B., Nguyen, Q. D. 2021; 24: 101228


    Purpose: To present a case of acute anterior uveitis with macular edema associated with sildenafil citrate use in an HLA-B27 positive patient.Observations: A 54-year-old Caucasian male presented at an ophthalmology tertiary center with complaint of pinkish discoloration, irritation, and photophobia in the left eye (OS). He noted that these symptoms appeared one day after using sildenafil for the first time to treat his erectile dysfunction. The patient had no significant ocular history besides refractive surgery in both eyes (OU) and his medical history was insignificant. Best-corrected visual acuity (BCVA) was 20/20 in the right eye (OD) and 20/25 in OS. Slit-lamp-examination (SLE) demonstrated trace cells and 1+ flare in the anterior chamber (AC) in OS and was nonrevealing in AC in OD. Spectral domain optical coherence tomography (SD-OCT) showed parafoveal subretinal hyperreflective deposits in OU. The patient was diagnosed with acute anterior uveitis (AAU) in the left eye and was placed on topical prednisolone acetate.At 2-week follow-up, the patient reported that his eye symptoms had improved since starting topical steroids but worsened again two days after he had used sildenafil for a second time. In OS, best-corrected visual acuity (BCVA) worsened to 20/40, and SLE revealed 1+ cells and 1+ flare in AC. SD-OCT revealed cystoid macular edema only in OS. Fluorescein angiography showed mild staining around the optic disc and significant macular leakage in OS and minimal macular leakage in OD. Uveitis evaluations revealed that the patient was human leukocyte antigen-27 (HLA-B27) positive. The patient was asked to remain off sildenafil and continue topical prednisolone acetate. At 3-month follow-up, BCVA improved to 20/20 in OS with no evidence of active inflammation.Conclusions and importance: Sildenafil citrate use might be associated with new onset of intraocular inflammation in predisposed patients. Further studies are necessary to establish this relationship.

    View details for DOI 10.1016/j.ajoc.2021.101228

    View details for PubMedID 34761138

  • Structural changes of corneal epithelium in belantamab-associated superficial keratopathy using anterior segment optical coherence tomography. American journal of ophthalmology case reports Matsumiya, W., Karaca, I., Ghoraba, H., Akhavanrezayat, A., Mobasserian, A., Hassan, M., Regenold, J., Yasar, C., Liedtke, M., Kitazawa, K., Nguyen, Q. D. 2021; 23: 101133


    Purpose: To describe structural changes in corneal epithelium using anterior segment optical coherence tomography (AS-OCT) in two relapsed and refractory multiple myeloma (RRMM) patients with bilateral belantamab-associated superficial keratopathy (BASK).Observations case 1: A 56-year-old male who was diagnosed with RRMM and initiated on belantamab mafodotin, presented on day 42 (three weeks after the second infusion) with decreased pinhole visual acuity from 20/20 and 20/25 to 20/70 and 20/50 in the right eye and left eye, respectively. Slit-lamp examination revealed moderate superficial keratopathy with microcystic-like epithelial changes (MECs) in the paracentral cornea in both eyes. AS-OCT demonstrated increased bilateral heterogeneous signal intensity and hyperreflective lesions as well as increased thickness in the paracentral corneal epithelium with uninvolved central cornea. Given bilateral MECs, the third infusion was withheld, and then given on day 62 after five weeks of drug-free interval. Although MECs had improved on day 82, pinhole visual acuity remained at 20/50 and 20/40 in the right eye and the left eye. AS-OCT showed that hyperreflective lesions mostly resolved and corneal epithelial thickness returned to baseline, despite a slightly increased persisting heterogeneous signal intensity in the peripheral corneal epithelium in both eyes.Case 2: A 77-year-old male with RRMM was started on belantamab mafodotin infusions. His pinhole visual acuity decreased from 20/40 and 20/30 at baseline to 20/60 and 20/40 on day 41 (three weeks after the second infusion) in the right eye and left eye, respectively. Slit-lamp examination showed diffuse, moderate MECs in both eyes, which was more severe in the peripheral cornea. AS-OCT demonstrated increased bilateral heterogeneous signal intensity and hyperreflective lesions in the corneal epithelium, which are more severe in the right eye along with increased corneal epithelial thickness. Therefore, belantamab mafodotin was withheld.Conclusions and Impotance: AS-OCT objectively demonstrated structural changes such as signal intensity and thickness alterations with hyperreflective lesions in the corneal epithelium related to BASK. AS-OCT might be useful for clinicians to monitor ocular surface adverse events in RRMM patients receiving belantamab mafodotin and to adjust therapeutic plans for the patients.

    View details for DOI 10.1016/j.ajoc.2021.101133

    View details for PubMedID 34169181

  • Oral montelukast is associated with decreased odds of diabetic retinopathy Pham, B., Matsumiya, W., Akhavanrezayat, A., Uludag, G., Yasar, C., Ghoraba, H., Hwang, J., Lajevardi, S., Lam, B., Regenold, J., Yavari, N., Bazojoo, V., Karaca, I., Mobasserian, A., Nguyen, H., Nguyen, Q. ASSOC RESEARCH VISION OPHTHALMOLOGY INC. 2021
  • Effect of pupil size on fixed-luminance flicker full-field electroretinogram magnitude Mobasserian, A., Halim, M., Hwang, J., Regenold, J., Akhavanrezayat, A., Ghoraba, H., Matsumiya, W., Yavari, N., Karaca, I., Yasar, C., Lajevardi, S., Pham, B., Do, D., Quan Dong Nguyen ASSOC RESEARCH VISION OPHTHALMOLOGY INC. 2021
  • Correlation between photoreceptor density in adaptive optics imaging with retinal structure and sensitivity in autoimmune retinopathy Matsumiya, W., Akhavanrezayat, A., Uludag, G., Yasar, C., Ghoraba, H., Mobasserian, A., Karaca, I., Lam, B., Pham, B., Hwang, J., Afridi, R., Halim, M., Do, D., Sepah, Y., Quan Dong Nguyen ASSOC RESEARCH VISION OPHTHALMOLOGY INC. 2021
  • Posterior segment manifestations in patients with HLA-B27 associated uveitis Lajevardi, S., Onghanseng, N. L., Park, J., Khan, H., Atilgan, M., Halim, M., Uludag, G., Matsumiya, W., Yilmaz, M., Ghoraba, H., Hien Luong Doan, Mobasserian, A., Hwang, J., Quan Dong Nguyen, Hasanreisoglu, M. ASSOC RESEARCH VISION OPHTHALMOLOGY INC. 2021
  • Novel retinopathy identified in pediatric retinal vasculitis Yasar, C., Matsumiya, W., Akhavanrezayat, A., Ghoraba, H., Halim, M., Uludag, G., Pham, B., Hwang, J., Karaca, I., Lajevardi, S., Lam, B., Regenold, J., Sepah, Y. J., Quan Dong Nguyen ASSOC RESEARCH VISION OPHTHALMOLOGY INC. 2021
  • Altered patient demography and increased complexity of ICD coding in uveitis over 10 years Hwang, J., Halim, M., Uludag, G., Yasar, C., Ghoraba, H., Pham, B., Lajevardi, S., Lam, B., Regenold, J., Bazojoo, V., Karaca, I., Mobasserian, A., Do, D. V., Sepah, Y. J., Quan Dong Nguyen ASSOC RESEARCH VISION OPHTHALMOLOGY INC. 2021
  • Structural and functional changes in non-paraneoplastic autoimmune retinopathy Akhavanrezayat, A., Onghanseng, N. L., Halim, M., Uludag, G., Ghoraba, H., Matsumiya, W., Pham, B., Mobasserian, A., Regenold, J., Yasar, C., Karaca, I., Bazojoo, V., Lajevardi, S., Do, D. V., Quan Dong Nguyen ASSOC RESEARCH VISION OPHTHALMOLOGY INC. 2021
  • Safety of intravenous high-dose pulse methylprednisolone succinate in the management of pediatric uveitis Ghoraba, H., Akhavanrezayat, A., Matsumiya, W., Pham, B., Yasar, C., Karaca, I., Mobasserian, A., Regenold, J., Lam, B., Hwang, J., Lajevardi, S., Yavari, N., Halim, M., Sepah, Y. J., Do, D. V., Quan Dong Nguyen ASSOC RESEARCH VISION OPHTHALMOLOGY INC. 2021
  • Pars plana vitrectomy with internal limiting membrane flap versus pars plana vitrectomy with conventional internal limiting membrane peeling for large macular hole COCHRANE DATABASE OF SYSTEMATIC REVIEWS Ghoraba, H., Abdelkarem, A., Akhavanrezayat, A., Matsumiya, W., Karaca, I., Mishra, K., Yasar, C., Pham, B., Mobasserian, A., Quan Dong Nguyen 2021