Retina images are obtained from the fundus camera and graded by skilled professionals. However there is considerable shortage of expert observers has encouraged computer assisted monitoring. Evaluation of blood vessels network plays an important task in a variety of medical diagnosis. Manifestations of numerous vascular disorders, such as diabetic retinopathy, depend on detection of the blood v...

This paper presents an augmented reality platform for eye laser treatment with region guidance for intelligent surgery. The proposed method aims to assist doctors to plan the surgery, semi-automatically detect and protect sensitive regions within the retina and guide the laser during photocoagulation treatment for Diabetic Retinopathy. In the pre-surgical phase, we mosaic multiple retina fundus...

For decades, rods and cones were thought to be the only photoreceptors in the mammalian retina. However, a population of atypical photoreceptive retinal ganglion cells (RGCs) expresses the photopigment melanopsin and is intrinsically photosensitive (ipRGCs). These ipRGCs are crucial for relaying light information from the retina to the brain to control circadian photoentrainment, pupillary ligh...

Recent progress in retinal image acquisition techniques, including optical coherence tomography (OCT) and scanning laser ophthalmoscopy (SLO), combined with improved performance of adaptive optics (AO) instrumentation, has resulted in improvement in the quality of in vivo images of cellular structures in the outer layers of the human retina. Despite the significant progress in imaging cone and ...

This paper describes a model of three-dimensional cellular automata allowing to simulate different phenomena in the fields of computer graphics and image processing, and to combine them together in order to produce complex effects such as automatic multitexturing, surface imperfections, or biological retina multi-layer cellular behaviours. Our cellular automaton model is defined as a network of...

It is unknown which retinal image features are analyzed to control axial eye growth and refractive development. On the other hand, identification of these features is fundamental for the understanding of visually acquired refractive errors. Cyclopleged chicks were individually kept in the center of a drum with only one viewing distance possible. Defocusing spectacle lenses were used to stimulat...

Microglia are the mononuclear phagocytes with various functions in the central nervous system, and the morphologies of microglia imply the different stages and functions. In optical nerve transection model of the retina, the retrograde degeneration of retinal ganglion cells induces microglial activations to a unique morphology termed rod microglia. A few studies described the rod microglia in t...

This article gives an overview of a normative theory visual receptive fields. We describe how idealized functional models early spatial, spatio-chromatic and spatio-temporal fields can be derived in principled way, based on set axioms that reflect structural properties the environment combination with assumptions about internal structure vision system to guarantee consistent handling image repr...

In normal vision our gaze leaps from detail to detail, resulting in rapid image motion across the retina. Yet we are unaware of such motion, a phenomenon known as saccadic suppression. We recorded neural activity in the middle temporal and middle superior temporal cortical areas during saccades and identical image motion under passive viewing conditions. Some neurons were selectively silenced d...

This paper presents an approach of using multiple image processing techniques including color segmentation, image smoothing, contrast enhancing, edge processing, thresholding and morphological reconstruction processing to identify and count the number of rods and cones in a mouse retina microscope image. Different approaches of image preprocessing have also been tested and the results have also...