Congenital aniridia: European COST action ANIRIDIA-NET guidelines for diagnosis, management and care.

Congenital aniridia is a rare ocular disorder affecting the majority of eye structures and can be associated with systemic manifestations. The main visible phenotypic characteristic is the partial or complete absence of the iris; however, foveal hypoplasia is a more frequent and reliable clinical sign. Other ocular comorbidities are associated with the disease, such as cataract, keratopathy and optic nerve hypoplasia.

Fluctuations in angle lambda with the pupil diameter and correlations with biometric values in a healthy population.

Purpose: Angle lambda (λ) is defined as the angle between the line of sight and the pupillary axis at the entrance pupil. We previously developed a child-friendly and portable method to measure this angle in daily practice. In a given population, angle λ fluctuates according to age or refractive error.

Vision toolkit part 1. Neurophysiological foundations and experimental paradigms in eye-tracking research: a review.

Eye-tracking research offers valuable insights into human gaze behavior by examining the neurophysiological mechanisms that govern eye movements and their dynamic interactions with external stimuli. This review explores the foundational principles of oculomotor control, emphasizing the neural subsystems responsible for gaze stabilization and orientation. Although controlled laboratory studies have significantly advanced our understanding of these mechanisms, their ecological validity remains a critical limitation.

Bayesian trial of adalimumab versus secukinumab for children with juvenile idiopathic arthritis associated uveitis or chronic anterior uveitis.

Background: Juvenile idiopathic arthritis (JIA)-associated uveitis and chronic anterior uveitis in children may result in permanent sight loss. Currently, the only licensed and approved treatment for JIA-uveitis is adalimumab. However, even in patients where adalimumab may be initially effective, therapeutic response may subside for example, due to neutralising drug antibodies.

Peripapillary hyperreflective ovoid mass-like structure (PHOMS) and optic disc drusen in pediatric pseudo-papilledema.

Purpose: Diagnosing pseudo-papilloedema (PPO) in children presents challenges and may lead to invasive investigations, with optic disc drusen (ODD) being the most common etiology. Other specific causes include tilted disc, optic neuritis, tumoral infiltration, vitreo-papillary traction, and Leber hereditary optic neuropathy. Peripapillary hyperreflective ovoid mass-like structures (PHOMS) are frequently observed in these cases, yet their pathophysiology remains unexplained, particularly their relation to ODD, which is still debated.

Chiasmal Decussation in Oculo-Cutaneous Albinism Type 8.

Purpose: Albinism is a genetic disorder characterized by a defect in melanin biosynthesis. Ophthalmological and dermatological impairments vary according to the patient genotype and are highly heterogenous. Recently, variants in the DCT gene were showed to be responsible for a new type of oculocutaneous albinism (OCA) named OCA8.

Incidental finding of a pathogenic mosaicism in the NF1 gene detected by near infrared fundus imaging - a case report.

Background: Neurofibromatosis type 1 is an autosomal dominant disorder predisposing to numerous tumors. Sporadic mutations account for half of the cases. They can occur on a mosaic pattern, which might remain undiagnosed, depending on the clinical phenotype.

12-month outcomes after voretigene neparvovec gene therapy in paediatric patients with -mediated inherited retinal dystrophy.

Aims: To report main outcomes and complications following voretigene neparvovec (Luxturna) treatment in paediatric patients.

Methods: Records of patients under the age of 17 treated by subretinal administration of voretigene neparvovec for confirmed biallelic -mediated inherited retinal dystrophy were retrospectively reviewed. Best-corrected visual acuity (BCVA) and data from spectral-domain optical coherence tomography, ultra-wide-field fundus imaging and Goldmann visual field (VF) were analysed at 12 months follow-up.

GPATCH11 variants cause mis-splicing and early-onset retinal dystrophy with neurological impairment.

Here we conduct a study involving 12 individuals with retinal dystrophy, neurological impairment, and skeletal abnormalities, with special focus on GPATCH11, a lesser-known G-patch domain-containing protein, regulator of RNA metabolism. To elucidate its role, we study fibroblasts from unaffected individuals and patients carrying the recurring c.328+1 G > T mutation, which specifically removes the main part of the G-patch domain while preserving the other domains.

Association of optic disc drusen and small scleral canals - A systematic review and meta-analysis.

The pathophysiology of optic disc drusen (ODD) has long been discussed. According to one leading theory, they develop from calcified mitochondria extruded from axons compressed by an unusually small scleral canal. To examine this hypothesis, we conducted a systematic review and meta-analysis evaluating the scleral canal size in patients with ODD (PO) in comparison to healthy subjects (HS).

Optic disc drusen and scleral canal size - protocol for a systematic review and meta-analysis.

Background: Around one in forty patients are diagnosed with optic disc drusen (ODD) during their lifetime. Complications of these acellular deposits range from asymptomatic visual field deficits to artery occlusion and subsequent cecity. Still, the pathogenesis of their emergence remains controversial.

Ceroid lipofuscinosis type 2 disease: Effective presymptomatic therapy-Oldest case of a presymptomatic enzyme therapy.

Neuronal ceroid lipofuscinosis type 2 (CLN2) disease is a rare, lysosomal storage disorder that causes pediatric onset neurodegenerative disease. It is characterized by mutations in the TPP1 gene. Symptoms begin between 2 and 4 years of age with loss of previously acquired motor, cognitive, and language abilities.

Optic Disc Hypoplasia Assessment in PAX6 -Related Aniridia.

Background: This study aims to characterize optic disc hypoplasia in congenital aniridia using ultra-wide-field imaging (UWFI) and nonmydriatic retinal photography (NMRP). We also investigated the relation between optic disc hypoplasia and foveal hypoplasia.

Methods: This is a retrospective case series of patients diagnosed with PAX6 -related aniridia in a National Referral Center, who underwent UWFI, NMRP, and spectral-domain optical coherence tomography (SD-OCT) .

Update on gene therapies in pediatric ophthalmology.

Rare eye diseases encompass a broad spectrum of genetic anomalies with or without additional extraocular manifestations. Genetic eye disorders in pediatric patients often lead to severe visual impairments. Therefore, a challenge of gene therapy is to provide better vision to these affected children.

Retinal stroke: research models, targets and experimental drugs.

Introduction: Retinal artery occlusion (RAO), often caused by a microembolus and resulting in inner retinal ischemia, could be considered as the retinal analog to cerebral stroke. Although several therapeutic targets have been suggested in animal models of retinal ischemia and several potential treatments have been evaluated on small series of patients, central retinal artery occlusion (CRAO) is still rarely treatable in clinical practice.

Areas Covered: Here, we review several animal models of RAO, including increased intraocular pressure, laser, vasoconstriction, embolization and clamp.

Gene therapies in pediatric ophthalmology.

Genetic pediatric eye disease frequently leads to severe vision impairment or blindness. Voretigene neparvovec is the first approved gene therapy for an inherited retinal dystrophy (IRD). Voretigene neparvovec has been shown to be well tolerated and safe, with encouraging results in terms of efficacy, mainly when administered early in childhood.

Optical Coherence Tomography Angiography Assessment in Congenital Aniridia.

Purpose: This study aims to characterize foveal vasculature assessed by optical coherence tomography angiography (OCT-A) in congenital aniridia which is hallmarked by foveal hypoplasia (FH).

Design: Cross-sectional case-control analysis.

Methods: At the National Referral Center for congenital aniridia, patients with confirmed PAX6-related aniridia and FH diagnosed on spectral-domain OCT (SD-OCT) with available OCT-A and matched control subjects were included.

Ocular sequelae of epidermal necrolysis: French national audit of practices, literature review and proposed management.

Stevens-Johnson Syndrome (SJS) and toxic epidermal necrolysis (TEN) are serious and rare diseases, most often drug-induced, and their incidence has been estimated at 6 cases/million/year in France. SJS and TEN belong to the same spectrum of disease known as epidermal necrolysis (EN). They are characterized by more or less extensive epidermal detachment, associated with mucous membrane involvement, and may be complicated during the acute phase by fatal multiorgan failure.

Thyroid-stimulating hormone receptor signaling restores skeletal muscle stem cell regeneration in rats with muscular dystrophy.

Duchenne muscular dystrophy (DMD) is a severe and progressive myopathy leading to motor and cardiorespiratory impairment. We analyzed samples from patients with DMD and a preclinical rat model of severe DMD and determined that compromised repair capacity of muscle stem cells in DMD is associated with early and progressive muscle stem cell senescence. We also found that extraocular muscles (EOMs), which are spared by the disease in patients, contain muscle stem cells with long-lasting regenerative potential.