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Regional Gene Expression Profile Comparison Reveals the Unique Transcriptome of the Optic Fissure.

PURPOSE: The optic fissure (OF) is a transient opening in the ventral optic cup (OC) that acts as a passage for blood vessels and retinal ganglion cell axons during early eye development. Failure to close the OF is the developmental basis for uveal coloboma, a congenital blinding eye disease that significantly contributes to childhood blindness. Genes specifically expressed in the OF region may play important roles in OF development and function. The aim of this study was to characterize the transcriptome of OC cells in the OF region and investigate the function of OF-specific genes during OF

Optical Coherence Tomography Angiography Analysis of Perfused Peripapillary Capillaries in Primary Open-Angle Glaucoma and Normal-Tension Glaucoma.

PURPOSE: To compare perfused peripapillary capillary density in primary open-angle glaucoma (POAG), normal-tension glaucoma (NTG), and normal patients using optical coherence tomography angiography (OCT-A). METHODS: A retrospective review of POAG, NTG, and normal patients imaged with OCT-A was performed. En face OCT angiograms identifying peripapillary vessels were obtained using a spectral-domain OCT system (Avanti RTVue-XR). A custom image analysis approach identified perfused peripapillary capillaries, quantified perfused capillary density (PCD), and generated color-coded PCD maps for 3.5-

Ultrastructural analysis of the pigment dispersion syndrome in DBA/2J mice.

PURPOSE: To characterise ocular pigment abnormalities associated with iris atrophy in DBA/2J mice as a model for human pigment dispersion syndrome. METHODS: Immunohistochemistry, electron and light microscopy were performed to examine the eyes of DBA/2J mice ranging in age from 2.5 to 18 months old. The focus of our study was the description of the ultrastructural modifications in the irides of DBA/2J mice. RESULTS: The DBA/2J mice presented modifications in the melanosomes in all the pigmented parts of the eye, including the retinal pigment epithelial cells and choroidal melanocytes of the

Image analysis for retinopathy of prematurity diagnosis.

PURPOSE: To review findings from the authors' published studies involving telemedicine and image analysis for retinopathy of prematurity (ROP) diagnosis. METHODS: Twenty-two ROP experts interpreted a set of 34 wide-angle retinal images for presence of plus disease. For each image, a reference standard diagnosis was defined from expert consensus. A computer-based system was used to measure individual and linear combinations of image parameters for arteries and veins: integrated curvature (IC), diameter, and tortuosity index (TI). Sensitivity, specificity, and receiver operating characteristic

[Molecular genetic findings in patients with congenital cone dysfunction. Mutations in the CNGA3, CNGB3, or GNAT2 genes].

PURPOSE: This study compares clinical and molecular genetic findings in patients with congenital cone dysfunction. METHODS: In this study 28 patients underwent a basic ophthalmologic examination. Except for a 1-year-old boy, color vision, perimetry, and full-field ERG (ISCEV standard) were evaluated in all patients. Blood samples were taken for molecular genetic analysis of the CNGA3, CNGB3, or GNAT2 genes. RESULTS: Two patient groups could be distinguished: patients without and with residual cone function in the ERG. In 14 of 17 patients without cone function, mutations in one of the three

Effects of umbilical cord occlusion in late gestation on the ovine fetal brain and retina.

OBJECTIVE: Previous studies on the effects of umbilical cord occlusion (UCO) on the fetal brain have focused on short-term alterations, and in most cases have used only subjective techniques to evaluate brain injury. Our aim was to assess quantitatively the persistent consequences of UCO on the developing brain; we also examined the retina. METHODS: We subjected fetal sheep to a single episode of UCO at 126 days of gestation (term approximately 147 days) to induce at least 10 minutes of isoelectric fetal electrocorticogram (ECoG). RESULTS: UCO resulted in fetal asphyxia and transient mild al

Population prevalence of tilted optic disks and the relationship of this sign to refractive error.

PURPOSE: To assess the prevalence of tilted disks and its association with refractive error and visual field defects. DESIGN: Population-ba … .5%), pallor, and tessellation of the adjacent chorioretinal tissues (74.0%), situs inversus of the retinal vessels (70.1%), beta-peripapillary atrophy (64.9%), strabismus (30.4%), visual field defects (19.4%), posterior staphyloma (18.2%), inferonasal pigmentary accumulation (9.1%), and chorioretinal atrophy (5.2%). Superotemporal (33.3%) and superior (25.0%) vi …

Total retinal nitric oxide production is increased in intraocular pressure-elevated rats.

Nitric oxide (NO) is a well-known vaso-dilator but its regulation in the retina is unclear. This study was conducted to quantify total NO production and retinal ganglion cell (RGC) loss in an experimental glaucoma model. Three quarters of the peri-limbal/episcleral drainage vessels and anterior angle (right eyes) of Sprague-Dawley rats were thermally blocked using laser irradiation, while the left eyes served as controls. We measured the intraocular pressure (IOP) of both eyes using a digital tonometer (Tonopen) 21, 28 and 35 days after the laser treatment. After 35 days, we determined the tot

Racial variation in retinopathy of prematurity. The Cryotherapy for Retinopathy of Prematurity Cooperative Group.

OBJECTIVES: To determine and compare the incidence of severe, vision-threatening retinopathy of prematurity (ROP) in black and white low-birth-weight infants. DESIGN: Prospective cohort study. SETTING: Seventy neonatal intensive care units in 23 US participating centers in the Multicenter Trial of Cryotherapy for Retinopathy of Prematurity. PATIENTS: A total of 4099 premature infants weighing less than 1251 g at birth were enrolled to evaluate the natural history of ROP. This 'Natural History' cohort included 2158 white infants and 1584 black infants who were followed up prospectively accor

X-recessive angiopathic opticopathy.

A familial optic atrophy with X-recessive heredity, distinct from Leber's optic atrophy (LOA), is described. The symptoms are: slight to moderate pallor of the papillomacular bundle at the disc possibly preceded by some hyperaemia of the disc, telangiectasia on the disc with normal retinal vessels, occurrence in the second decade of life, slow progression with often subclinical visual loss, a small relative central scotoma with an intact peripheral visual field, slight acquired tritanopia and deuteranopia, and vasomotor headaches. The disease may exhibit severe exacerbations with loss of visio…

Association of static and dynamic pupillary abnormalities with retinal microvasculopathy and neurodegeneration in diabetics.

PURPOSE: To investigate the characteristics of pupillary statics and dynamics and explore the relationship between pupillary abnormalities and microvascular as well as neurodegenerative changes of retina in the early stages of diabetes. METHODS: This cross-sectional observational study included forty-eight diabetic subjects without diabetic retinopathy (NDR group), thirty-nine diabetic subjects with mild or moderate non proliferative diabetic retinopathy (DR group), and forty age- and sex-matched healthy adults (control group). Pupil size and pupillary light reflex were measured monocularly u

Changes in optic nerve head microvasculature following disc hemorrhage absorption in glaucomatous eyes.

This study investigated the changes in optic nerve head (ONH) microvasculature, circumpapillary retinal nerve fiber layer (cpRNFL) thickness, and visual field (VF) sensitivity following the absorption of optic disc hemorrhage (DH). Intradisc vessel density (dVD) was calculated using a 3 × 3 mm optic disc scan in 60 eyes of 60 patients with primary open angle glaucoma and DH who had undergone two or more swept-source optical coherence tomography angiography exams. Clinical parameters at the time of DH occurrence and after absorption, as well as those between the subgroups based on DH recurrence

Advances in origin, evolution, and pathogenesis of optic disc drusen: A narrative review.

Optic disc drusen (ODD) is acellular calcified deposits found mainly in front of the lamina cribrosa within the optic nerve. It can cause chronic or acute vision loss. There has been progress in clinical diagnosis using ophthalmic multimodal imaging in recent years. We conducted a database search on PubMed and Google Scholar (April 2023) with no restrictions on publication year or language. We used the terms: ("optic disc drusen") OR ("optic nerve head drusen") OR ("drusen of optic nerve head"). Other terms included gene, mutation, scleral canal, axonal transport, calcinosis, mitochondria, blo

Large Choroidal Vessels as a Risk Factor for Idiopathic Choroidal Neovascularization.

BACKGROUND AND OBJECTIVE: Idiopathic macular neovascularization (iCNV) is a rare and juvenile maculopathy affecting otherwise healthy individuals. The long-term visual prognosis is better than other CNVs. However, scarce insights on the disease mechanisms have been identified. The role of mechanical compression exerted by a pachyvessel is explored in this study. PATIENTS AND METHODS: Patients affected by iCNV, with no evidence of previous retinal/uveitis diseases, were retrospectively enrolled. For every patient, best-corrected visual acuity (BCVA), optical coherence tomography (OCT) data and

When vision loss signals vasculitis: central retinal artery occlusion leading to microscopic polyangiitis diagnosis-a case report.

Central retinal artery occlusion (CRAO) is an ophthalmic emergency characterized by sudden vision loss; it is rarely associated with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis. Herein, we report a case of a man in his 80s who, experiencing persistent fever, weight loss, and myalgia, received corticosteroid therapy at a local hospital for a presumptive diagnosis of polymyalgia rheumatica. While on this treatment, he suddenly developed vision loss in the left eye; visual acuity was limited to light perception, and fundus examination revealed a cherry-red spot in the macula,

Совпадение с Такаясу Артеритом и множественным склерозом: обзор скрипта и доклад по делу.

ВВЕДЕНИЕ: Такайасу-артерит (ТА) и множественный склероз (МС) являются как иммунизированными заболеваниями, которые могут сосуществовать, при этом ТА вызывает сосудистое воспаление, а MS - обезвоживание, вызванное аберрантной активностью Т-клеток. Совпадение этих условий подчеркивает наличие общих иммунных механизмов, таких, как регулирование " Т-клеток " и высвобождение цитокина, что подчеркивает необходимость нюансированного понимания их взаимодействия, которое изучается в ходе описательного обзора зарегистрированных случаев. Мы рассказываем обо всех зарегистрированных случаях насил

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… The preservation of visual acuity, no hints at arteritis of the retinal vessels on fundoscopy or MRI and the vast improvement of retinal alterations after only 2 weeks of antihypertensives militate against a direct arteritic retinopathy or optic neuritis in our patient. …

Association between macular and papillary vessel density by optical coherence tomography angiography in a large healthy population.

PURPOSE: To provide a normative data set of the relationship between macular and papillary vessel density (VD) using swept-source optical coherence tomography angiography (SS-OCTA) in a large healthy population. METHODS: Cross-sectional study conducted on 346 right eyes of healthy subjects. Macular and papillary SS-OCTA VD measurements of the retinal superficial capillary plexus (SCP), deep capillary plexus (DCP), and choriocapillaris (CC) in the central area and the four quadrants were obtained. Correlations between macular and papillary VD among different quadrants were assessed. RESULTS:

Longitudinal Choriocapillaris Vascular Density Changes in Different Types of Primary Open-Angle Glaucoma.

PURPOSE: To evaluate longitudinal changes in choriocapillaris perfusion in patients with glaucoma with four phenotypes of optic disc damage and to explore associated factors with decreased choriocapillaris vessel density (CVD). METHODS: This prospective longitudinal study included 96 eyes of 96 patients with primary open-angle glaucoma (POAG). Patients with POAG was differentiated into the optic disc phenotypes of focal ischemic type (FI), myopic type (MY), senile sclerotic type (SS), and generalized enlargement type (GE). Patients were followed up every three months. Simple linear regression

Retinal ganglion cell-inner plexiform layer, white matter hyperintensities, and their interaction with cognition in older adults.

PURPOSE: We explored the interaction of optical coherence tomography (OCT) parameters and white matter hyperintensities with cognitive measures in our older adult cohort. METHODS: This observational study enrolled participants who underwent a comprehensive neuropsychological battery, structural 3-T brain magnetic resonance imaging (MRI), visual acuity examination, and OCT imaging. Cerebral small vessel disease (CSVD) markers were read on MR images; lacune, cerebral microbleeds (CMB), white matter hyperintensities (WMH), and enlarged perivascular spaces (EPVS), were defined according to the ST

Analysis of White and Dark without Pressure in a Young Myopic Group Based on Ultra-Wide Swept-Source Optical Coherence Tomography Angiography.

Purpose: This study aimed to investigate the incidence of white without pressure (WWOP) and dark without pressure (DWOP) in a young myopic group based on multimode imaging and to explore the quantitative changes in DWOP based on ultra-wide swept-source optical coherence tomography angiography (SS-OCTA). Methods: A total of 138 patients with high myopia (SE < −6.00 D) were recruited. Examinations, including indirect ophthalmoscope, ultra-wide color fundus photograph, and ultra-wide SS-OCTA, were conducted for each eye. A total of 50 of the 138 patients were selected for further analysis since t