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hassan hashemi ocular

Negin Amirshekarizadeh, Hassan Hashemi, Ebrahim Jafarzadehpur, Ali Mirzajani, Abbasali Yekta, Mehdi Khabazkhoob
PURPOSE: To determine the effect of cyclopentolate, tropicamide, and artificial tear drops on higher-order aberrations (HOAs) in normal eyes with OPD-Scan III (Nidek Inc., Tokyo, Japan). METHODS: In this study, 189 eyes of individuals aged 20 to 35 years were selected as samples. Inclusion criteria were a corrected visual acuity of 20/20 or better, a minimum size of about 5 mm for the pupil in the dark, hyperopia and myopia less than 5 D, and astigmatism less than 2 D...
September 30, 2016: Eye & Contact Lens
Hassan Hashemi, Reza Ghaffari, Mohammad Miraftab, Soheila Asgari
PURPOSE: To compare 18-month outcomes between femtosecond laser-assisted LASIK (femto-LASIK) and photorefractive keratectomy with mitomycin-C (PRK-MMC) for myopia of more than 7.0 D in terms of visual acuity and quality. METHODS: In this comparative nonrandomized clinical trial, 60 eyes from 30 patients (30 eyes in each group) were enrolled. The two procedures were compared in terms of 18-month changes in uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction spherical equivalent, ocular and corneal higher order aberrations (HOAs), and contrast sensitivity (CS)...
October 3, 2016: International Ophthalmology
Mehrdad Mohammadpour, Zahra Heidari, Hossein Mohammad-Rabei, Ebrahim Jafarzadehpur, Mahmoud Jabbarvand, Hassan Hashemi, Mehdi Khabazkhoob
PURPOSE: To evaluate the correlation between refractive, corneal, and residual astigmatism and higher order aberrations (HOA) in refractive surgery candidates. METHODS: Three hundred and seventy-five eyes of 188 patients aged 28.2 ± 6.24 years with a predominance of females (62.7%) were enrolled in this study. Refraction, topography (Orbscan IIz, Bausch & Lomb, Rochester, NY, USA), and aberrometry (Zywave, Bausch & Lomb, Rochester, NY, USA) were performed to determine refractive and corneal astigmatism and HOA for all participants...
September 2016: Journal of Current Ophthalmology
Hassan Hashemi, Hadith Rastad, Mohammad Hassan Emamian, Akbar Fotouhi
OBJECTIVES: To estimate the prevalence of floppy eyelid syndrome (FES) and to determine the associated factors in a representative sample of Iranian adult population aged 45 to 69 years. METHODS: The data were according to the second phase of Shahroud Eye Cohort Study performed in 2014 with 4,737 participants aged 45 to 69 years. Diagnosis of FES was made based on the clinical judgment of the ophthalmologist during ocular examinations. The percentage and confidence intervals (CIs) of the prevalence of FES were reported, and the associated factors were analyzed using simple and multiple logistic regression models...
July 13, 2016: Eye & Contact Lens
Somayeh Radaie-Moghadam, Hassan Hashemi, Ebrahim Jafarzadehpur, Abbas Ali Yekta, Mehdi Khabazkhoob
PURPOSE: To determine the effect of using toric soft contact lenses on corneal biomechanical properties. METHODS: We enrolled 33 healthy patients with mean age of 23.18 ± 4.06 and minimal cylinder power of 1 D (-1.98 ± 0.808 SD) and negative history of contact lens use; keratoconic patients were excluded from the study. Toric soft contact lenses (BIOFINITY, Comfilcon A, Coopervision, Southampton, UK) were fitted in all participants. The Ocular Response Analyzer (Reichert Ophthalmic Instruments, Depew, New York, USA) was used to measure corneal hysteresis (CH), corneal resistance factor (CRF), and the Pentacam HR (Oculus, Inc...
April 2016: Journal of Ophthalmic & Vision Research
Hassan Hashemi, Soheila Asgari, Mahdi Mortazavi, Reza Ghaffari
OBJECTIVE: To compare the effect of femtosecond-assisted thin flap laser-assisted in situ keratomileusis (FS-LASIK) and photorefractive keratectomy with mitomycin-C (PRK-MMC) in highly myopic patients (>7.0 D [D]) on corneal biomechanical parameters. METHODS: In this prospective comparative interventional case series, 60 patients (30 patients in each group) with a manifest refractive spherical equivalent (MRSE) greater than 7.0 D were enrolled. Corvis ST parameters were measured before and at 3 and 6 months postoperatively...
May 26, 2016: Eye & Contact Lens
Mehrdad Mohammadpour, Siamak Maleki, Hassan Hashemi, Amir Houshang Beheshtnejad
PURPOSE: To describe a case of chronic graft versus host disease (GVHD) leading to severe dry eye and recurrent corneal perforation in both eyes, its stepwise management and histopathological reports. CASE REPORT: A 22-year-old woman with a history of thalassemia and subsequent high-dose chemotherapy followed by allogeneic bone marrow transplant (BMT) was referred to Farabi Eye Hospital. Despite aggressive medical and surgical intervention, corneal vascularization in her right eye progressed and led to corneal perforation...
January 2016: Journal of Ophthalmic & Vision Research
Hassan Hashemi, Mehdi Khabazkhoob, Rafael Iribarren, Mohammad Hassan Emamian, Akbar Fotouhi
BACKGROUND: To assess five-year refractive changes and their related factors in the 40-64 year old population of Shahroud, Iran. DESIGN: Prospective cohort study. PARTICIPANTS: Of the 5190 participants of Phase I 4737 participated in Phase II (response rate =91.3%). METHODS: Participants were tested by refraction, visual acuity, slit-lamp biomicroscopy, ophthalmoscopy, and biometry. Myopia was defined as a spherical equivalent more negative than -0...
April 5, 2016: Clinical & Experimental Ophthalmology
Soheila Asgari, Hassan Hashemi, Ebrahim Jafarzadehpur, Alireza Mohamadi, Farhad Rezvan, Akbar Fotouhi
The purpose of this study was to test the measurements of a multifunctional device, the NIDEK OPD-Scan III in terms of repeatability and agreement with retinoscopy and Pentacam in cases with emmetropia, ametropia, and KCN (grade 1-3). We enrolled 170 eyes (40 in each group of emmetropia and ametropia, and 90 in the 3 KCN subgroups). Acquisitions were done twice by a single technician to check the intra class correlation, repeatability index, and precision. To assess agreement, we compared OPD-Scan III with retinoscopy and Pentacam results by two blinded technicians...
October 2016: International Ophthalmology
Hassan Hashemi, Mohammad Miraftab, Reza Ghaffari, Soheila Asgari
OBJECTIVE: To compare the results of femtosecond-assisted laser in situ keratomileusis (femto-LASIK) and photorefractive keratectomy with mitomycin C (PRK-MMC) for the correction of myopia more than 7.0 diopters (D). METHODS: In this comparative nonrandomized trial, 60 eyes (30 eyes in each group) were enrolled. Patients were tested for uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction spherical equivalent, ocular and corneal aberrations, and contrast sensitivity (CS) before surgery and at 3 and 6 months postoperatively...
December 9, 2015: Eye & Contact Lens
Ebrahim Jafarzadehpur, Hassan Hashemi, Tahereh Abdolahinia, Abbas A Yekta, Mehdi Khabazkhoob
OBJECTIVE: To compare differences in higher-order aberrations (HOAs) between two standard spherical monofocal intraocular lenses (IOLs), the hydrophobic acrylic Alcon SA60AT (Bausch & Lomb), and hydrophilic acrylic Rayner Superflex (620H) (Rayner). METHODS: In this case series, sixty-eight eyes of 68 patients who underwent phacoemulsification cataract surgery were studied. In group 1 (n=39), the hydrophobic Alcon SA60AT IOL, and in group 2 (n=29), the hydrophilic Rayner Superflex (620H) IOL, were implanted...
September 2015: Eye & Contact Lens
Mehrdad Mohammadpour, Zahra Heidari, Mehdi Khabazkhoob, Afsaneh Amouzegar, Hassan Hashemi
PURPOSE: To investigate the correlation of major components of ocular astigmatism in myopic patients in an academic hospital. METHODS: This cross-sectional study was conducted on 376 eyes of 188 patients who were referred to Farabi Eye Hospital for refractive surgery. Preoperative examinations including refraction and corneal topography were performed for all candidates to measure refractive and corneal astigmatism. Ocular residual astigmatism was calculated using vector analysis...
February 2016: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
Hassan Hashemi, Mehdi Khabazkhoob, Mohammad Hassan Emamian, Mohammad Shariati, Saman Mohazzab-Torabi, Akbar Fotouhi
PURPOSE: The purpose of this study was to determine the prevalence of a history of ocular trauma and its association to age, sex, and biometric components. MATERIALS AND METHODS: Residents of Shahroud, Iran aged 40-64 years, were sampled through a cross-sectional study using multistage cluster sampling. Three hundred clusters were randomly selected, and 20 individuals were systematically selected from each cluster. The subjects underwent optometric and ophthalmic examinations, and ocular imaging...
July 2015: Middle East African Journal of Ophthalmology
Mohammad Taher Rajabi, Ali Makateb, Hassan Hashemi, Edward J Holland, Ali Djalilian, Jeffrey A Nerad
The authors report a case where formalin was accidentally injected into the eyelids of a 71-year-old woman undergoing blepharoplasty, causing full thickness necrosis of both upper eyelids and ocular complications that required multiple reconstructive surgical procedures.
July 2015: Ophthalmic Plastic and Reconstructive Surgery
Mohammad Miraftab, Hassan Hashemi, Akbar Fotouhi, Mehdi Khabazkhoob, Farhad Rezvan, Soheila Asgari
PURPOSE: To compare the accuracy of  Sanders-Retzlaff-Kraff II (SRK II) and 3(rd) and 4(th) generation intraocular lens (IOL) formulas and to compare the effect of different anterior chamber depths among the IOL formulas in cataract patients with normal axial length (AL; 22.0-24.5 millimeters, mm). MATERIALS AND METHODS: A retrospective chart review was performed of patients with normal AL who underwent cataract surgery. The SRK II and 3(rd) generation IOL formulas (Hoffer Q, SRK T, Holladay 1) were compared to the 4(th) generation Haigis formula...
October 2014: Middle East African Journal of Ophthalmology
Hassan Hashemi, Mehdi Khabazkhoob, Mohammad Hassan Emamian, Mohammad Shariati, Akbar Fotouhi
PURPOSE: To determine the prevalence of corneal arcus, its risk factors, and its relationship to ocular and visual indices. METHODS: In this cross-sectional study, 300 clusters were randomly selected from Shahroud in the north of Iran, using multistage sampling. A total of 20 people were invited to participate from each cluster. After enrollment, all optometric, biometric and ophthalmic exams were conducted on site. RESULTS: Of 6311 people invited, 5190 (82...
October 2014: Ophthalmic Epidemiology
Hassan Hashemi, Ebrahim Jafarzadehpur, Soraya Ghaderi, Abbasali Yekta, Hadi Ostadimoghaddam, Reza Norouzirad, Mehdi Khabazkhoob
PURPOSE: To determine the distribution of ocular biometric components and their correlation with age and sex during the ages of ocular development in a 6- to 18-year-old population in Iran. METHOD: In this cross-sectional study, which was performed in October 2012, multi-stage stratified cluster sampling was used to sample the study population from Dezful schools, a city in the southwest of Iran. Biometric examinations were done by an experienced optometrist using the LENSTAR/BioGraph (WaveLight AG, Erlangen, Germany)...
February 2015: Acta Ophthalmologica
Hassan Hashemi, Farhad Rezvan, Abbas Ali Yekta, Maryam Hashemi, Reza Norouzirad, Mehdi Khabazkhoob
PURPOSE: The prevalence of astigmatism, and the astigmatic axis, and their determinants were evaluated in a rural population of Iran. MATERIALS AND METHODS: In a cross-sectional study conducted from May to August 2011, 13 villages in the vicinity of the city of Khaf in northeast Iran were investigated in this study. All the examinations including visual acuity, refraction, slit-lamp biomicroscopy and fundoscopy were performed in a Mobile Eye Clinic. Written informed consent was obtained from all participants...
April 2014: Middle East African Journal of Ophthalmology
Hassan Hashemi, Mohammad Amin Seyedian, Mohammad Miraftab, Hooman Bahrmandy, Araz Sabzevari, Soheila Asgari
BACKGROUND: To compare the 6-month results of two formulations of Riboflavin provided by Sina Darou, Iran, and Uznach, Switzerland, in corneal collagen cross-linking (CXL) for keratoconus patients. FINDINGS: Considering the results of the previous study about the similarity of the formulations and the active ingredients of the two types of Riboflavin, they were used in the CXL procedure of 60 keratoconic eyes (30 eyes in each group). After 6 months, the mean improvement of UCVA (0...
2014: Daru: Journal of Faculty of Pharmacy, Tehran University of Medical Sciences
Shiva Mehravaran, Soheila Asgari, Sara Bigdeli, Ashkan Shahnazi, Hassan Hashemi
The purpose of this study was to determine and compare the repeatability of keratometry measurements with the Javal manual keratometer, Topcon automated kerato-refractometer, IOLMaster, EyeSys Corneal Analysis System, and Pentacam Scheimpflug Topography System, and determine the agreement of measurements of the latter four devices with the Javal keratometer as the gold standard. In this cross-sectional study, 21 people with no history of ocular disease or surgery were examined twice with each device. Minimum, maximum, and average keratometry readings were recorded in diopters (D) for each eye and used in the analyses...
August 2014: International Ophthalmology
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