Broadband Optoelectronic Synapses In article number 2302885, Jia Huang, Jianhua Zhang, Lize Xiong, and co-workers report retina-inspired optoelectronic synaptic transistors that present broadband responses. Simplified neuromorphic visual systems are developed to simulate comprehensive image perception, memory, preprocessing functions in a wide wavelength range from ultraviolet near-infrared, ev...

Normal retinal tissue consists of the nine-layer sensory retina on the vitreous side and onelayer retinal pigment epithelium on the choroidal side. Serous retinal detachment is a detachment of the sensory retina from the retinal pigment epithelium. Central serous chorioretinopathy (CSC) is a condition causing local serous neurosensory detachment in the macular region. CSC causes circular or ova...

I A histochemical reaction has been described which allows the investigator to distinguish between light and dark adapted retinal receptors. The incubation medium employed contained NBT, succinate, TC 199, and a buffer. The reactive process studied has its locus in the ellipsoid of the retinal receptor. Several response characteristics of this reaction have been reported, including the finding ...

Purpose To demonstrate a novel technique for capturing optical coherence tomography images of peripheral retina and its application in identifying rhegmatogenous retinal detachments within bullous retinoschisis. Observations We report two patients presenting with bullous retinoschisis noted on clinical examination. After performing optical coherence tomography studies utilizing our image acqu...

Diabetic Retinopathy is a medical condition where the retina is damaged because fluid leaks from blood vessels into the retina. The presence of hemorrhages in the retina is the earliest symptom of diabetic retinopathy. The number and shape of hemorrhages is used to indicate the severity of the disease. Early automated hemorrhage detection can help reduce the incidence of blindness. This paper i...

We demonstrate a multimode detection system in a scanning laser ophthalmoscope (SLO) that enables simultaneous operation in confocal, indirect, and direct modes to permit an agile trade between image contrast and optical sensitivity across the retinal field of view to optimize the overall imaging performance, enabling increased contrast in very wide-field operation. We demonstrate the method on...

Biological vision systems process signals extracted by a retina that reduces the dimensionality of visual information for processing by higher cortical areas. To date researchers in machine vision have not reported computing a biologically inspired artificial retina that can sample visual information without over-sampling the central foveal region or creating discontinuities in the retinal tess...

The virtual retinal display (VRD) is a display technology which scans modulated laser light on the retina of viewer's eye to create an image. The viewer has perception of standing just in front of high resolution screen or projector but in reality image is on the retina of his eye and not on the screen. The VRD is a device that scans an image, one pixel at a time just like ordinary CRT. The VRD...

As we described in the previous chapter, the first step in the visual process is the formation of an image on the retina by the eye’s optics. Thus, the optical quality of the eye imposes the first limit on spatial vision (Charman, 1983). It has been long known that the normal human eye suffers from many aberrations that degrade retinal image quality (Helmholtz, 1896). As shown in Fig. 1, a poin...

Computing a camera’s ego-motion from an image sequence is easier to accomplish when a spherical retina is used, as opposed to a standard retinal plane. On a spherical field of view both the focus of expansion and contraction are visible, whereas for a planar retina that is not necessarily the case. Recent research has shown that omnidirectional systems can be used to emulate spherical retinas b...