A morphological analysis of experimental myopia in young
... globe for the nasal and temporal views of the eye, but control experiments showed that these slight inaccuracies did not affect the apparent axial length or corneal radius. The horizontal plane of hemisection was found to pass through the centres of the cornea, pupil, and lens, and the maximum diame ...
... globe for the nasal and temporal views of the eye, but control experiments showed that these slight inaccuracies did not affect the apparent axial length or corneal radius. The horizontal plane of hemisection was found to pass through the centres of the cornea, pupil, and lens, and the maximum diame ...
Vitreous Pharmacokinetics and Retinal Safety of
... Purpose: To compare the intravitreal pharmacokinetic profile of a triamcinolone acetonide formulation containing the preservative benzyl alcohol (TA-BA) versus a preservative-free triamcinolone acetonide formulation (TA-PF), and evaluate potential signs of toxicity to the retina. Methods: A total of ...
... Purpose: To compare the intravitreal pharmacokinetic profile of a triamcinolone acetonide formulation containing the preservative benzyl alcohol (TA-BA) versus a preservative-free triamcinolone acetonide formulation (TA-PF), and evaluate potential signs of toxicity to the retina. Methods: A total of ...
Sheetal Baldava 1 , M. Gopal Kishan 2
... cases per 10000 live Births. This leads to colobomata affecting one or more areas of the eye including the cornea, iris, ciliary body, lens, retina, choroid, and optic nerve. The typical, most frequently observed, ocular coloboma is seen in the inferonasal quadrant. A complete iris coloboma involves ...
... cases per 10000 live Births. This leads to colobomata affecting one or more areas of the eye including the cornea, iris, ciliary body, lens, retina, choroid, and optic nerve. The typical, most frequently observed, ocular coloboma is seen in the inferonasal quadrant. A complete iris coloboma involves ...
Astigmatism
... Infants are born with ATR astigmatism, where the cornea is the source of the astigmatism Preschool children have little or no astigmatism ...
... Infants are born with ATR astigmatism, where the cornea is the source of the astigmatism Preschool children have little or no astigmatism ...
Permeability of blood-ocular barriers of neonatal and adult
... into the iris stroma. This could explain the gradient observed, and critical examination of the kitten iris pigment epithelium did show evidence of fluorescence within those layers. However, this present study did not discern whether the intraepithelial fluorescence was evidence of through-and-throu ...
... into the iris stroma. This could explain the gradient observed, and critical examination of the kitten iris pigment epithelium did show evidence of fluorescence within those layers. However, this present study did not discern whether the intraepithelial fluorescence was evidence of through-and-throu ...
PDF
... known to have several functions during vertebrate embryonic development. Recent studies have highlighted a crucial role for retinal pigmented epithelium (RPE)-released ATP in regulating retinoblast proliferation (Martins and Pearson, 2008; Pearson et al., 2002; Pearson et al., 2005). Moreover, E-NTP ...
... known to have several functions during vertebrate embryonic development. Recent studies have highlighted a crucial role for retinal pigmented epithelium (RPE)-released ATP in regulating retinoblast proliferation (Martins and Pearson, 2008; Pearson et al., 2002; Pearson et al., 2005). Moreover, E-NTP ...
Glaucoma
... • Secondary glaucoma—depends on primary disease • Inflammation of the iris and other areas in the front part of the eye (uveitis)—may note pain (for many days); red or bloodshot eyes, caused by dilated blood vessels (known as “scleral injection”); and cloudiness due to fluid buildup in the clear par ...
... • Secondary glaucoma—depends on primary disease • Inflammation of the iris and other areas in the front part of the eye (uveitis)—may note pain (for many days); red or bloodshot eyes, caused by dilated blood vessels (known as “scleral injection”); and cloudiness due to fluid buildup in the clear par ...
Visual fields
... where the arcuate defects meet at the median raphe. This is called Roenne’s nasal step, and it is mostly superior nasal step as, Superior field is involve somewhat more frequently. ...
... where the arcuate defects meet at the median raphe. This is called Roenne’s nasal step, and it is mostly superior nasal step as, Superior field is involve somewhat more frequently. ...
Organization and Significance of Neurons That Detect Change of
... or vergence other than in odonate larvae and in the preying mantis, which use true stereopsis (Baldus, 1926; Rossel, 1986). A special case of binocular vision is used by male calliphorid flies, which possess an area of high retinal acuity that provides information about the centered image of a pursu ...
... or vergence other than in odonate larvae and in the preying mantis, which use true stereopsis (Baldus, 1926; Rossel, 1986). A special case of binocular vision is used by male calliphorid flies, which possess an area of high retinal acuity that provides information about the centered image of a pursu ...
RETINOBLASTOMA: Enucleation, Partial or Complete Exenteration
... Typical histologic features include cells with large, basophilic nuclei and scant cytoplasm. Mitoses are generally frequent. Calcification and necrosis are common with sleeves of viable cells typically surrounding blood vessels (pseudorosettes). Apoptotic cells may be seen. The extent of differentia ...
... Typical histologic features include cells with large, basophilic nuclei and scant cytoplasm. Mitoses are generally frequent. Calcification and necrosis are common with sleeves of viable cells typically surrounding blood vessels (pseudorosettes). Apoptotic cells may be seen. The extent of differentia ...
acute posterior multifocal placoid pigment epitheliopathy following
... changes in the photoreceptor layer have been described as a consequence of the lesion healing process [7]. APMPPE cases generally evolve with spontaneous resolution in 2-6 weeks and have a good visual prognosis [8]. Persisting RPE atrophy can be noticed both clinically and by fundus autofluorescence ...
... changes in the photoreceptor layer have been described as a consequence of the lesion healing process [7]. APMPPE cases generally evolve with spontaneous resolution in 2-6 weeks and have a good visual prognosis [8]. Persisting RPE atrophy can be noticed both clinically and by fundus autofluorescence ...
Binocular Vision and Space Perception
... lids of one eye, we will become aware of a positive scotoma in the nasal periphery of that eye. It must be made clear at this point that whenever retinal elements, retinal points, or retinal areas are spoken of in this book, they are to be understood in the sense in which Sherrington85 used them. He ...
... lids of one eye, we will become aware of a positive scotoma in the nasal periphery of that eye. It must be made clear at this point that whenever retinal elements, retinal points, or retinal areas are spoken of in this book, they are to be understood in the sense in which Sherrington85 used them. He ...
Wavefront Aberrations and Peripheral Vision
... laser ablation, and lenses implanted into the eye. During the last decade, the wish to correct more than the refractive errors has grown; corrections are refined to also compensate for more irregular optical errors in the eye, so-called high-order monochromatic aberrations (or simply “aberrations”). ...
... laser ablation, and lenses implanted into the eye. During the last decade, the wish to correct more than the refractive errors has grown; corrections are refined to also compensate for more irregular optical errors in the eye, so-called high-order monochromatic aberrations (or simply “aberrations”). ...
Wnt/beta-catenin signaling in vertebrate eye development
... (Figure 1E). The migrating neural crest cells inhibit the lens specification, while their ablation results in ectopic lens formation (Bailey et al., 2006). In chick embryos, the neural crest cells secrete multiple TGFβs which activate WNT/β-catenin signaling by inducing WNT2b in the adjacent non-len ...
... (Figure 1E). The migrating neural crest cells inhibit the lens specification, while their ablation results in ectopic lens formation (Bailey et al., 2006). In chick embryos, the neural crest cells secrete multiple TGFβs which activate WNT/β-catenin signaling by inducing WNT2b in the adjacent non-len ...
IOSR Journal of Dental and Medical Sciences (IOSR-JDMS)
... in comparison with initial enucleation, has two advantages; first, the patient has not to sacrifice an organ after such severe accident; secondly, we can easily fit an ocular prosthesis with better motility on phthisic eye. In our case neither optic nerve nor extraocular muscles were avulsed, theref ...
... in comparison with initial enucleation, has two advantages; first, the patient has not to sacrifice an organ after such severe accident; secondly, we can easily fit an ocular prosthesis with better motility on phthisic eye. In our case neither optic nerve nor extraocular muscles were avulsed, theref ...
Psychology : Concepts and Connections, Ninth Edition, Spencer A
... Psychology : Concepts and Connections, Ninth Edition, Spencer A. Rathus Chapter 4 ...
... Psychology : Concepts and Connections, Ninth Edition, Spencer A. Rathus Chapter 4 ...
PD Lecture 1999 - University of Pittsburgh
... Melanocytoma - Clinical Characteristics 10 times more likely to occur in darkskinned individuals In contrast, uveal melanomas are 15 times more likely to occur in Caucasians Benign lesion with low malignant potential ...
... Melanocytoma - Clinical Characteristics 10 times more likely to occur in darkskinned individuals In contrast, uveal melanomas are 15 times more likely to occur in Caucasians Benign lesion with low malignant potential ...
the physical limits of grating visibility
... trast sensitivity is higher for interference gratings than for gratings viewed conventionally, A fundamental question is visual science is how but in both situations, the CSF is bandpass with optical and neural factors combine to determine sensitivity falling monotonically from approxivisual perform ...
... trast sensitivity is higher for interference gratings than for gratings viewed conventionally, A fundamental question is visual science is how but in both situations, the CSF is bandpass with optical and neural factors combine to determine sensitivity falling monotonically from approxivisual perform ...
Ophthalmology and Eye Disease - Faculty of Medical and Health
... electrical signal. Rods and cones Rods and cones process the visual signal in characteristic ways and are described by performance functions which include the rod and cone spectral sensitivity curves as well as light and dark adaptation curves among other measures. They also differ in the minimum de ...
... electrical signal. Rods and cones Rods and cones process the visual signal in characteristic ways and are described by performance functions which include the rod and cone spectral sensitivity curves as well as light and dark adaptation curves among other measures. They also differ in the minimum de ...
PowerPoint-presentatie
... Clinically, a mean difference of 0.1 log(s) is comparable to 1 line on the visual acuity chart. • IOLs perform equally in terms of postoperative CDVA and ...
... Clinically, a mean difference of 0.1 log(s) is comparable to 1 line on the visual acuity chart. • IOLs perform equally in terms of postoperative CDVA and ...
Universitat Autònoma de Barcelona D B
... The progressive nature of the pathology in the TgIGF-I model allows the long-term evaluation of new therapeutic approaches. The second part of this work was dedicated to the study of the efficacy of a gene therapy approach aimed at counteracting neovascularization and neurodegeneration. Adenoassocia ...
... The progressive nature of the pathology in the TgIGF-I model allows the long-term evaluation of new therapeutic approaches. The second part of this work was dedicated to the study of the efficacy of a gene therapy approach aimed at counteracting neovascularization and neurodegeneration. Adenoassocia ...
Iris
... • The stroma connects a sphincter muscle (sphincter pupillae), which contracts the pupil • A set of dilator muscles (dilator pupillae) which open it. • Depending on the amount of light, the iris makes the pupil larger or ...
... • The stroma connects a sphincter muscle (sphincter pupillae), which contracts the pupil • A set of dilator muscles (dilator pupillae) which open it. • Depending on the amount of light, the iris makes the pupil larger or ...
Imaging of Orbital Trauma1
... injuries to the lens, open-globe injuries, ocular detachments, intraorbital foreign bodies, carotid cavernous fistula, and optic nerve injuries. Radiographic examination of the orbits is rarely performed. Ultrasonography (US) can be very useful for evaluating the globe and its contents; however, US ...
... injuries to the lens, open-globe injuries, ocular detachments, intraorbital foreign bodies, carotid cavernous fistula, and optic nerve injuries. Radiographic examination of the orbits is rarely performed. Ultrasonography (US) can be very useful for evaluating the globe and its contents; however, US ...
Diseases of the Retinal Pigment Epithelium
... lies in its complexity and varied functional roles. The RPE can no longer be considered a simple epithelial monolayer with uniform function and behavior. Instead, it must be regarded as a highly complex cell whose cytologic and functional properties are determined or modified by positional and topog ...
... lies in its complexity and varied functional roles. The RPE can no longer be considered a simple epithelial monolayer with uniform function and behavior. Instead, it must be regarded as a highly complex cell whose cytologic and functional properties are determined or modified by positional and topog ...
A Review in Innovation in Ocular Prostheses and Visual Implants
... Trial surgeries in model animals are showing a small subretinal hematoma developed in both eyes within 2 weeks postoperatively and a dark pigment changes which then stabilized, same as edema and higher intraocular pressure [8]. The subretinal implant is a chip with 1500 pixels, each one has a photod ...
... Trial surgeries in model animals are showing a small subretinal hematoma developed in both eyes within 2 weeks postoperatively and a dark pigment changes which then stabilized, same as edema and higher intraocular pressure [8]. The subretinal implant is a chip with 1500 pixels, each one has a photod ...
Retina
The retina (/ˈrɛtɪnə/ RET-i-nə, pl. retinae, /ˈrɛtiniː/; from Latin rēte, meaning ""net"") is the third and inner coat of the eye which is a light-sensitive layer of tissue. The optics of the eye create an image of the visual world on the retina (through the cornea and lens), which serves much the same function as the film in a camera. Light striking the retina initiates a cascade of chemical and electrical events that ultimately trigger nerve impulses. These are sent to various visual centres of the brain through the fibres of the optic nerve.In vertebrate embryonic development, the retina and the optic nerve originate as outgrowths of the developing brain, so the retina is considered part of the central nervous system (CNS) and is actually brain tissue. It is the only part of the CNS that can be visualized non-invasively.The retina is a layered structure with several layers of neurons interconnected by synapses. The only neurons that are directly sensitive to light are the photoreceptor cells. These are mainly of two types: the rods and cones. Rods function mainly in dim light and provide black-and-white vision, while cones support daytime vision and the perception of colour. A third, much rarer type of photoreceptor, the intrinsically photosensitive ganglion cell, is important for reflexive responses to bright daylight.Neural signals from the rods and cones undergo processing by other neurons of the retina. The output takes the form of action potentials in retinal ganglion cells whose axons form the optic nerve. Several important features of visual perception can be traced to the retinal encoding and processing of light.