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Correction: Live video rate volumetric OCT imaging of the retina with multi-MHz A-scan rates
[This corrects the article DOI: 10.1371/journal.pone.0213144.].
Journal Article
Vision : images, signals and neural networks: models of neural processing in visual perception
At the fascinating frontiers of neurobiology, mathematics and psychophysics, this book addresses the problem of human and computer vision on the basis of cognitive modeling. After recalling the physics of light and its transformation through media and optics, Hâerault presents the principles of the primate's visual system in terms of anatomy and functionality. Then, the neuronal circuitry of the retina is analyzed in terms of spatio-temporal filtering. This basic model is extended to the concept of neuromorphic circuits for motion processing and to the processing of color in the retina. For more in-depth studies, the adaptive non-linear properties of the photoreceptors and of ganglion cells are addressed, exhibiting all the power of the retinal pre-processing of images as a system of information cleaning suitable for further cortical processing. As a target of retinal information, the primary visual area is presented as a bank of filters able to extract valuable descriptors of images, suitable for categorization and recognition and also for local information extraction such as saliency and perspective. All along the book, many comparisons between the models and human perception are discussed as well as detailed applications to computer vision.
Book
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[...]the larger the hole was, the easier the secure insertion might be. Though in highly myopic eyes, Bruch membrane rupture and diffuse patchy chorioretinal atrophy are frequently present, there is still no direct histologic evidence showing a total absence of retinal pigment epithelium (RPE) and thus the total lack of pumping function in the macular area.
Journal Article
Curbside Consultation in Retina
Curbside Consultation in Retina: 49 Clinical Questions, Second Edition contains new questions and brief, practical, and evidence-based answers to the most frequently asked questions that are posed during a \"curbside consultation\" between surgical colleagues.
eBook
NP-006 Early detection of retinopathy in premature infants using mixture of eye drops with 2.5% phenylephrine hydrochloride and 0.5% tropicamide
BackgroundRetinopathy of prematurity (ROP) is an eye disease that can happen in premature babies. It causes abnormal blood vessels to grow in the retina and can lead to blindness. Birthweight and gestational age are the most important risk factors in the development of severe ROP. Phenylephrine and tropicamide are most commonly used as mydriatic agents for eye examination.PurposeUsing a combination of 2.5% phenylephrine hydrochloride and 0.5% tropicamide drops, in the Neonatal Intensive Care Unit (NICU), help us to discover abnormality in retinal vascularisation in the initial phase of retinopathy. This helps in effective medical treatment and healthy visual function.Material and methodsOne-thousand, five-hundred and forty premature infants with a gestational age between 26 and 32 weeks and/or birthweight between 680 g and 2100 g were examined by binocular indirect ophthalmoscopy between 2 to 4 weeks after birth, and followed up until retinal vascularisation was complete. Pupillary dilatation was done with a mixture of 2.5% phenylephrine hydrochloride and 0.5% tropicamide and instilled twice at intervals 1 hour before examination. The eye drops were prepared in our clinical pharmacy. In order to identify the stage of premature retinopathy, and eye examination was repeated every 7 to 10 days. Depending on the results, the term of the next examination was determined every 7 to 14 days. Once the regression was achieved in two consecutive examinations, the monitoring was done once a month.ResultsIn this study, a total of 1540 premature infants were screened from 10 May 2017 to 16 May 2018. Maximal pupil dilatation was achieved with a mixture of 2.5% phenylephrine hydrochloride and 0.5% tropicamide. All examined infants had some type of ROP. Some children had spontaneous regression. Four infants had ROP that had to be treated with anti-VGF therapy within 24 to 72 hours.ConclusionThe early detection of ROP in premature and very-low-birthweight infants is crucial. Screening programmes for ROP should be implemented in every NICU and should be carried out by an experienced ophthalmologist and offered to all premature infants with birthweight of ≤2100 g or gestational age of ≤32 weeks to ensure early detection and timely treatment of threshold ROP to prevent its blinding sequelae.References and/or acknowledgementsNone.
Journal Article
Increased Intracranial Pressure Does Not Cause Retinal Hemorrhages Characteristic of Abuse
Even in children with elevated intracranial pressure, severe retinal hemorrhages should prompt an evaluation for abuse.
Journal Article
Myo-Inositol Ineffective for Preventing Retinopathy of Prematurity
In a randomized placebo-controlled trial, myo-inositol given every 12 hours for up to 10 weeks did not reduce ROP or mortality in extremely premature infants.
Journal Article