Hassan Hashemi
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View article: Refractive development III: Variations in emmetropia and ametropia
Refractive development III: Variations in emmetropia and ametropia Open
Purpose The purpose of this study was to investigate biometric variations in emmetropia and ametropia, focusing on the differences and correlations found in adult eyes. Bigaussian analyses were performed to characterise the biometric prope…
View article: Enhanced Segmentation of Active and Nonactive Multiple Sclerosis Plaques in <scp>T1</scp> and <scp>FLAIR MRI</scp> Images Using Transformer‐Based Encoders
Enhanced Segmentation of Active and Nonactive Multiple Sclerosis Plaques in <span>T1</span> and <span>FLAIR MRI</span> Images Using Transformer‐Based Encoders Open
Demyelinating plaques in multiple sclerosis ( MS ) can be visualized using magnetic resonance imaging ( MRI ), where accurate segmentation of active and nonactive lesions is critical for diagnosis, monitoring disease progression, and guidi…
View article: Topographic factors associated with anterior chamber angle narrowing in patients with keratoconus
Topographic factors associated with anterior chamber angle narrowing in patients with keratoconus Open
AIM: To identify topographic determinants of the anterior chamber angle (ACA) in patients with keratoconus (KCN). METHODS: Four hundred and ten eyes of 294 patients with KCN were recruited for this study. First, complete ocular examination…
View article: Comparison of biomechanical indices measured by ocular response analyzer between children and elderly: a systematic review
Comparison of biomechanical indices measured by ocular response analyzer between children and elderly: a systematic review Open
Biomechanical study of the visual system by ocular response analyzer investigates the inter-structural biological relationships, mechanics, and function of the visual system. This review aimed to investigate the changes in corneal biomecha…
View article: Assessment of median nerve with magnetic resonance neurography in cases with carpal tunnel syndrome and controls
Assessment of median nerve with magnetic resonance neurography in cases with carpal tunnel syndrome and controls Open
Background: Carpal tunnel syndrome (CTS) is a common peripheral nerve entrapment disorder that is diagnosed using clinical signs and symptoms and confirmed via nerve conduction studies (NCSs). While NCS is a semi-invasive procedure, magnet…
View article: Assessment of drinking water quality and identifying pollution sources in a chromite mining region
Assessment of drinking water quality and identifying pollution sources in a chromite mining region Open
Water sources near mining regions are often susceptible to contamination from toxic elements. This study employs machine learning (ML) techniques to evaluate drinking water quality and identify pollution sources near a chromite mine in Ira…
View article: Comparison of the accommodative amplitude measured with and without the use of a specialised accommodative rule in children
Comparison of the accommodative amplitude measured with and without the use of a specialised accommodative rule in children Open
Objective To determine the agreement between measurements of accommodative amplitude (AoA) in children using a specialised accommodative rule and measurments without it. Methods A total of 502 children underwent optometric examinations, in…
View article: Distribution and associated factors of keratometry and corneal astigmatism in an elderly population
Distribution and associated factors of keratometry and corneal astigmatism in an elderly population Open
To determine the distribution of keratometry and corneal astigmatism (CA) and their association with demographic factors, systemic parameters, anthropometric measures, ocular biometric indices, and refractive errors in people aged 60 years…
View article: Decomposition of economic inequalities in dental caries among Iranian schoolchildren
Decomposition of economic inequalities in dental caries among Iranian schoolchildren Open
Introduction Monitoring social inequalities in dental caries is crucial for establishing priorities in oral health systems. This study aimed to assess economic inequalities in dental caries and its contributing factors among Iranian school…
View article: Prevalence of Certain Corneal Conditions and their Demographic Risk Factors; Tehran Geriatric Eye Study
Prevalence of Certain Corneal Conditions and their Demographic Risk Factors; Tehran Geriatric Eye Study Open
Background: Corneal abnormalities are one of the important reasons for visual impairment. There is little evidence of the prevalence of different types of corneal abnormalities. The aim of this study was to assess the prevalence of various…
View article: Evaluation of Corneal Higher-Order Aberrations by Pentacam HR in Rural Population of Iran
Evaluation of Corneal Higher-Order Aberrations by Pentacam HR in Rural Population of Iran Open
Purpose: To determine the distribution of corneal higher-order aberrations (HOAs) measured by pentacam HR in a rural Iranian population and their relationship with age, sex, and refractive errors. Methods: In this study, sampling was perfo…
View article: Distribution and prevalence of refractive error in Iranian adult population results of the PERSIAN eye cohort study PECS
Distribution and prevalence of refractive error in Iranian adult population results of the PERSIAN eye cohort study PECS Open
The Persian Eye Cohort Study, a population-based cross-sectional study from 2015 to 2020, examined refractive error prevalence among 48,618 Iranian adults aged 31 to 70. The study encompassed six centers in Iran, employing random cluster s…
View article: Herpes Simplex Virus Encephalitis Complicated by IntraParenchymal Hemorrhage in an 8-Month-Old Female: A Case Report
Herpes Simplex Virus Encephalitis Complicated by IntraParenchymal Hemorrhage in an 8-Month-Old Female: A Case Report Open
Background: Herpes simplex virus (HSV) encephalitis is a serious illness of the nervous system in children. While acyclovir treatment improves outcomes, mortality and morbidity are still considerable. Hemorrhagic consequences are uncommon …
View article: Effects of Pre_Operation Desogestrel Estradiol in Endometrial Preparation at Hysteroscopic Polypectomy
Effects of Pre_Operation Desogestrel Estradiol in Endometrial Preparation at Hysteroscopic Polypectomy Open
Background: Hysteroscopic surgery is a common gynecologic process in many conditions. Endometrial thinning is the main successful key for this process associated with many preoperative preparations. This study aimed to evaluate DE (Desoges…
View article: Subfoveal choroidal thickness in a general elderly population; Tehran geriatric eye study
Subfoveal choroidal thickness in a general elderly population; Tehran geriatric eye study Open
Purpose To determine the distribution of subfoveal choroidal thickness (SFCT) and its associated demographic, ocular, and systemic factors in an elderly population. Methods This report is part of the Tehran Geriatric Eye Study (TGES); a po…
View article: Prevalence of retinal pathologies in people over 60 years: the Tehran Geriatrics Eye Study
Prevalence of retinal pathologies in people over 60 years: the Tehran Geriatrics Eye Study Open
AIM: To determine the prevalence of some retinal pathologies in people over 60y and their association with demographic and ocular factors. METHODS: A cross-sectional study was conducted in Tehran using multistage cluster sampling. After se…
View article: The Effect of Cycloplegia on Ocular Alignment and AC/A Ratio
The Effect of Cycloplegia on Ocular Alignment and AC/A Ratio Open
Purpose: The present study sets out to investigate the effect of cyclopentolate-induced cycloplegia on distance and near deviation and the accommodative convergence/accommodation (AC/A) ratio. Methods: This prospective study was performed …
View article: Main issues in penetrating keratoplasty
Main issues in penetrating keratoplasty Open
This review explores contemporary challenges in penetrating keratoplasty (PK), focusing on technical intricacies, technological advancements, and strategies for preventing graft rejection. A systematic literature search from January 2018 t…
View article: The association between visual impairment and mental disorders
The association between visual impairment and mental disorders Open
To determine the association between visual impairment (VI) and some mental disorders using the general health questionnaire (GHQ) in individuals aged 60 years and above in Tehran, Iran. The present population-based cross-sectional study w…
View article: Mean cycloplegic refractive error in emmetropic adults – The Tehran Eye Study
Mean cycloplegic refractive error in emmetropic adults – The Tehran Eye Study Open
The cycloplegic refractive error in adults is about +0.50D between 20 - 50 years, disproving the existence of the myopic period at those ages.
View article: Distribution and Prevalence of Refractive Error in Iranian Adult Population, A Cross- sectional Population-based Study (Results of the PERSIAN Eye Cohort Study(PECS))
Distribution and Prevalence of Refractive Error in Iranian Adult Population, A Cross- sectional Population-based Study (Results of the PERSIAN Eye Cohort Study(PECS)) Open
The PERSIAN Eye Cohort Study, a population-based cross-sectional study from 2015 to 2020, examined refractive error prevalence among 48618 Iranian adults aged 31 to 70. The study encompassed six centers in Iran, employing random cluster sa…