Bi-allelic loss-of-function variants in POC5 cause a syndromic retinal, endocrine, and neuromuscular ciliopathy.

Purpose: A homozygous loss-of-function (LoF) variant in POC5 was previously described in an individual with retinitis pigmentosa. We identified POC5 variants in 12 probands with a syndromic phenotype. We aim to define the phenotype spectrum and molecular mechanism associated with biallelic POC5 LoF variants.

RPE65 variant p.(E519K) causes a novel dominant adult-onset maculopathy in 83 affected individuals.

Recessive RPE65-related retinopathy is an inherited retinal disease (IRD) that is a well-established target for gene therapy. Dominant RPE65-related retinopathy, however, due to Irish founder variant p.(D477G), is extremely rare.

Progression of Atrophy as a Function of ABCA4 Variants and Age of Onset in Stargardt Disease.

Purpose: The purpose of this study was to assess the natural course of the retinal atrophy growth rate in patients with Stargardt disease (STGD1) with particular mutations in ABCA4, which may be eligible for mutation-specific therapy.

Methods: Fundus autofluorescence images (Heidelberg Spectralis) were gathered from 221 patients (436 eyes) in two centers: Radboud UMC and Ghent University Hospital. The area of definitely decreased autofluorescence and total decreased autofluorescence was measured using the Heidelberg RegionFinder software tool.

Automated Cone Photoreceptor Detection in Adaptive Optics Flood Illumination Ophthalmoscopy.

Purpose: To develop and validate a deep learning-based model for detecting cone photoreceptor cells in adaptive optics flood illumination ophthalmoscopy (AO-FIO).

Design: Healthy volunteer study.

Participants: A total of 36 healthy participants were included.

Bi-allelic variants in three genes encoding distinct subunits of the vesicular AP-5 complex cause hereditary macular dystrophy.

Inherited retinal diseases (IRDs) are a genetically heterogeneous group of Mendelian disorders that often lead to progressive vision loss and involve approximately 300 distinct genes. Although variants in these loci account for the majority of molecular diagnoses, other genes associated with IRD await molecular identification. In this study, we uncover bi-allelic assortments of 23 different (22 loss-of-function) variants in AP5Z1, AP5M1, and AP5B1 as independent causes of recessive IRD in members of 19 families from nine countries.

A novel recurrent ARL3 variant c.209G > A p.(Gly70Glu) causes variable non-syndromic dominant retinal dystrophy with defective lipidated protein transport in human retinal stem cell models.

Inherited retinal dystrophies (IRDs) are characterized by their high clinical and genetic heterogeneity. Despite significant advances in the identification of genes associated with IRDs, many individuals and families still have not received a definite molecular diagnosis. Here, we performed clinical examinations and conducted genetic testing in five families with IRD.

Novel Insights Into Gyrate Atrophy of the Choroid and Retina (GACR): A Cohort Study.

Gyrate atrophy of the choroid and retina (GACR, OMIM #258870) is a rare inherited metabolic disorder characterized by progressive chorioretinal degeneration and hyperornithinemia. Current therapeutic modalities potentially slow disease progression but are not successful in preventing blindness. To allow for trial development, increased knowledge of the clinical phenotype and current therapeutic outcomes is required.

Characteristics of autosomal dominant WFS1-associated optic neuropathy and its comparability to OPA1-associated autosomal dominant optic atrophy.

This study aims to describe the ophthalmic characteristics of autosomal dominant (AD) WFS1-associated optic atrophy (AD WFS1-OA), and to explore phenotypic differences with dominant optic atrophy (DOA) caused by mutations in the OPA1-gene. WFS1-associated diseases, or 'wolframinopathies', exhibit a spectrum of ocular and systemic phenotypes, of which the autosomal recessive Wolfram syndrome has been the most extensively studied. AD mutations in WFS1 also cause various phenotypical changes including OA.

Combining a prioritization strategy and functional studies nominates 5'UTR variants underlying inherited retinal disease.

Background: 5' untranslated regions (5'UTRs) are essential modulators of protein translation. Predicting the impact of 5'UTR variants is challenging and rarely performed in routine diagnostics. Here, we present a combined approach of a comprehensive prioritization strategy and functional assays to evaluate 5'UTR variation in two large cohorts of patients with inherited retinal diseases (IRDs).

Paediatric cataract surgery with 27G vitrectomy instrumentation: the Ghent University Hospital Experience.

Objective: To describe a cohort of paediatric patients who underwent unilateral or bilateral lens extractions at Ghent University hospital using the Dutch Ophthalmic Research Center (D.O.R.

Optic nerve involvement in -related disease: observations from a multicentric case series.

Background: Congenital Stationary Night Blindness (CSNB) constitutes a group of non-progressive retinal disorders characterized by disturbances in scotopic vision and/or by a delay in adaptation to darkness, as well as by low visual acuity, myopia, nystagmus, and strabismus. Color vision and fundus appearance tend to be normal. To date, several CACNA1F gene variants have been linked to a CSNB phenotype but only few reports have focused on the optic nerve in this disease.

Articulated Instruments and 3D Visualization: A Synergy? Evaluation of Execution Time, Errors, and Visual Fatigue.

. The introduction of advanced endoscopic systems, such as the Storz Image1S and the Olympus Endoeye, heralds a new era of 3-dimensional (3D) visualization. The aim of this report is to provide a comprehensive overview of the neurophysiology of 3D view, its relevance in videoscopy, and to quantify the benefit of the new 3D technologies for both rigid and articulated instruments.