IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
... the equivalent radius of the receptive field exceeds the spacing between fields. A similar line of reasoning can be developed for two-dimensional receptive fields. Assuming radial symmetry of the fields, Bracewell's theorem states that the product of equivalent width dx and equivalent bandwidth ...
... the equivalent radius of the receptive field exceeds the spacing between fields. A similar line of reasoning can be developed for two-dimensional receptive fields. Assuming radial symmetry of the fields, Bracewell's theorem states that the product of equivalent width dx and equivalent bandwidth ...
animals - GrizzBio
... 3. Identify the germ layer (ectoderm, endoderm, or mesoderm) describe in each of the following. ______ Innermost germ layer ______ Covers the surface of the embryo ______ Middle layer ______ Gives rise to covering of animal and to the central nervous system in some phyla ______ Forms the muscle and ...
... 3. Identify the germ layer (ectoderm, endoderm, or mesoderm) describe in each of the following. ______ Innermost germ layer ______ Covers the surface of the embryo ______ Middle layer ______ Gives rise to covering of animal and to the central nervous system in some phyla ______ Forms the muscle and ...
Formation of Bilaminar Germ Disc (Second week of Development)
... endometrial stroma. • Trophoblast differentiates into 2 layers: (i) Cytotrophoblast (ii) Syncytiotrophoblast • Cytotrophoblast shows mitotic division. ...
... endometrial stroma. • Trophoblast differentiates into 2 layers: (i) Cytotrophoblast (ii) Syncytiotrophoblast • Cytotrophoblast shows mitotic division. ...
Sympathetic Ophthalmitis: A Case Presentation and Review of the
... At four week follow up, patient’s BCVA appeared stable at 6/18 on Snellen’s quotations. DISCUSSION The etiology of SO has not been completely understood, but the underlying pathophysiology is believed to be an autoimmune reaction against the exposed ocular antigens from the inciting eye8. The locati ...
... At four week follow up, patient’s BCVA appeared stable at 6/18 on Snellen’s quotations. DISCUSSION The etiology of SO has not been completely understood, but the underlying pathophysiology is believed to be an autoimmune reaction against the exposed ocular antigens from the inciting eye8. The locati ...
Segmental Scleral Buckling
... buckling as the procedure of choice for phakic retinal detachments as well as retinal detachments due to a dialysis or holes in lattice in myopic eyes. rates in patients with encircling buckles as well as in vitrectomized eyes.1 In our view, vitrectomy is advantageous in regard to short-term postope ...
... buckling as the procedure of choice for phakic retinal detachments as well as retinal detachments due to a dialysis or holes in lattice in myopic eyes. rates in patients with encircling buckles as well as in vitrectomized eyes.1 In our view, vitrectomy is advantageous in regard to short-term postope ...
Cell-mediated immunity against human retinal extract, S
... the pathogenesis of the chorioretinopathy in onchocerciasis, PBMC of onchocerciasis patients and endemic controls were challenged with human S-antigen, IRBP, or crude retinal extract. No difference could be shown between patients with or without onchocercal chorioretinopathy and endemic controls wit ...
... the pathogenesis of the chorioretinopathy in onchocerciasis, PBMC of onchocerciasis patients and endemic controls were challenged with human S-antigen, IRBP, or crude retinal extract. No difference could be shown between patients with or without onchocercal chorioretinopathy and endemic controls wit ...
Immunology, Inflammation and Diseases of the Eye Brochure
... immunological features, diseases and inflammation of the eye and its support structures and organs. Rather than taking an immunological focus that is strictly suitable for clinicians, the volume offers a considerable basic science background and addresses a broad range of topics - the immune system ...
... immunological features, diseases and inflammation of the eye and its support structures and organs. Rather than taking an immunological focus that is strictly suitable for clinicians, the volume offers a considerable basic science background and addresses a broad range of topics - the immune system ...
Purtscher`s Retinopathy - Delhi Journal of Ophthalmology
... emboli travelling to the right carotid artery because of its anatomical difference from left common carotid artery.10 The characteristic findings in the fundus are Purtscher flecken, which are multiple cotton wool spots of varying sizes. The retinal whitening and hemorrhages resolve over several mon ...
... emboli travelling to the right carotid artery because of its anatomical difference from left common carotid artery.10 The characteristic findings in the fundus are Purtscher flecken, which are multiple cotton wool spots of varying sizes. The retinal whitening and hemorrhages resolve over several mon ...
Ocular Odyssey
... Posterior portion is receptive and ends at the orra serrata Anterior portion is nonreceptive The Retina Macula lutea-center of the posterior portion. Depressed in the center to form the fovea centralis RPE-retinal pigmented epithelium single layer of cells Absorb light/aid in the turn over of photor ...
... Posterior portion is receptive and ends at the orra serrata Anterior portion is nonreceptive The Retina Macula lutea-center of the posterior portion. Depressed in the center to form the fovea centralis RPE-retinal pigmented epithelium single layer of cells Absorb light/aid in the turn over of photor ...
- JCI Insight
... The recent Zika virus (ZIKV) epidemic has posed significant challenges for health care and for the economy of Brazil and other affected countries (1, 2). While ZIKV infection during pregnancy has been linked primarily to microcephaly, a birth defect, the overall magnitude of risk remains uncertain ( ...
... The recent Zika virus (ZIKV) epidemic has posed significant challenges for health care and for the economy of Brazil and other affected countries (1, 2). While ZIKV infection during pregnancy has been linked primarily to microcephaly, a birth defect, the overall magnitude of risk remains uncertain ( ...
Systemic disease and the eye - International Council of
... is the commonest cause of fungal endophthalmitis Affected patients usually have a history of drug abuse or indwelling central lines or immuno-compromised. In the initial stages, floaters are the main symptom. As the condition progresses, whitish “puff-balls” and vitreous strands develop (‘string of ...
... is the commonest cause of fungal endophthalmitis Affected patients usually have a history of drug abuse or indwelling central lines or immuno-compromised. In the initial stages, floaters are the main symptom. As the condition progresses, whitish “puff-balls” and vitreous strands develop (‘string of ...
Ocular abnormalities in the myopathic hamster (UM-X7.1
... Animals of the UM-X7.1 strain were obtained from Dr. G. Jasmin, University of Montreal, Montreal, P. Q., and then bred locally. Both animals with clinically detectable abnormal eyes and those with normal eyes were killed at various ages for macroscopic and microscopic evaluation. Tissues from nonaff ...
... Animals of the UM-X7.1 strain were obtained from Dr. G. Jasmin, University of Montreal, Montreal, P. Q., and then bred locally. Both animals with clinically detectable abnormal eyes and those with normal eyes were killed at various ages for macroscopic and microscopic evaluation. Tissues from nonaff ...
Macular Surgery - Back to Medical School
... • Sudden severe visual loss • Visual loss may not be total due to cilioretinal artery • Usually embolic, rarely due to GCA • Attempt to reperfuse artery if within 24 hours of onset • Should be seen urgently to exclude GCA and identify ...
... • Sudden severe visual loss • Visual loss may not be total due to cilioretinal artery • Usually embolic, rarely due to GCA • Attempt to reperfuse artery if within 24 hours of onset • Should be seen urgently to exclude GCA and identify ...
Lecture - ClassTools.Info
... Center-Surround How’s it done? Difference of Gaussians (Mexican hat) ...
... Center-Surround How’s it done? Difference of Gaussians (Mexican hat) ...
Slide 1 - Ommbid.com
... regions of the eye. The posterior segment is made up of the most proximal parts of the eye. These include the retina proper and the back of the eye where the optic nerve exits. On the outside of the globe is the sclera, which adds rigidity to the eye. Internal to this layer is the choroid, which is ...
... regions of the eye. The posterior segment is made up of the most proximal parts of the eye. These include the retina proper and the back of the eye where the optic nerve exits. On the outside of the globe is the sclera, which adds rigidity to the eye. Internal to this layer is the choroid, which is ...
Retinal vessel photocoagulation: a quantitative comparison
... Fig. 4. A, Distribution of vacuolization. Each data point represents one burn. Inner retinal damage is defined as the total volume of vacuolization around the vessel; outer retinal damage, as the volume of vacuolization at the level of the photo receptors. Volume of vacuoles was computed from vacuol ...
... Fig. 4. A, Distribution of vacuolization. Each data point represents one burn. Inner retinal damage is defined as the total volume of vacuolization around the vessel; outer retinal damage, as the volume of vacuolization at the level of the photo receptors. Volume of vacuoles was computed from vacuol ...
Senses ppt
... 1- Olfactory receptors: bipolar neurons Dendrites have olfactory hairs (cilium) hanging from the dendrites ...
... 1- Olfactory receptors: bipolar neurons Dendrites have olfactory hairs (cilium) hanging from the dendrites ...
Ch 8 (30 MCQ questions)
... a) Visual after-effects are usually confined to the adapted region of the visual field. b) Staring at a small red patch does not change the perceived colour of the whole visual field but only of a local region. c) Very few visual after-effects show inter-ocular transfer. d) After-effects are mediate ...
... a) Visual after-effects are usually confined to the adapted region of the visual field. b) Staring at a small red patch does not change the perceived colour of the whole visual field but only of a local region. c) Very few visual after-effects show inter-ocular transfer. d) After-effects are mediate ...
Special Senses
... 1- Olfactory receptors: bipolar neurons Dendrites have olfactory hairs (cilium) hanging from the dendrites ...
... 1- Olfactory receptors: bipolar neurons Dendrites have olfactory hairs (cilium) hanging from the dendrites ...
Adenocarcinoma of retinal pigment epithelium
... the vitreous (Fig. 1). The lesion occupied an area of about 5 disc diameters and was more pigmented in its nasal side. Some subretinal glial reaction was seen in its inferonasal border, which was continued by a serous detachment extending towards the macula. The retinal vessels adjacent to the tumou ...
... the vitreous (Fig. 1). The lesion occupied an area of about 5 disc diameters and was more pigmented in its nasal side. Some subretinal glial reaction was seen in its inferonasal border, which was continued by a serous detachment extending towards the macula. The retinal vessels adjacent to the tumou ...
Hereditary Retinal Dystrophies
... Description and inheritance - this is an X-linked recessive disease, caused by mutations of the RS1 gene, which encodes the protein retinoschisin. This results in retinoschisis, or splitting of the retina's layers, usually in the outer plexiform layer. The affected part of the retina will have subop ...
... Description and inheritance - this is an X-linked recessive disease, caused by mutations of the RS1 gene, which encodes the protein retinoschisin. This results in retinoschisis, or splitting of the retina's layers, usually in the outer plexiform layer. The affected part of the retina will have subop ...
Sum Res UH Student Memo
... Nimesh Patel, OD, PhD – Glaucoma is a group of optic neuropathies that can result in irreversible blindness, especially if not treated. Although there is no cure, early detection and treatment can slow the progression of vision loss. Non-invasive OCT imaging is often used to assess early structural ...
... Nimesh Patel, OD, PhD – Glaucoma is a group of optic neuropathies that can result in irreversible blindness, especially if not treated. Although there is no cure, early detection and treatment can slow the progression of vision loss. Non-invasive OCT imaging is often used to assess early structural ...
BRVO – Current Practice
... III among others. Most of the times, they are expensive and the results are equivocal and most of the internists don’t have a clue about what needs to be done if an investigation comes positive! ...
... III among others. Most of the times, they are expensive and the results are equivocal and most of the internists don’t have a clue about what needs to be done if an investigation comes positive! ...
Things about the Eye that every Internist should know COLD!!!
... • Hyphema (layered blood in the anterior chamber) • Microhyphema (non-layered RBC’s in the anterior chamber) – Complete hyphema: vision may be LP only – Blunt trauma (look for iris tears, iridodialysis) – Neovascularization from DM, uveitis, past intraocular surgery; tumors can bleed spontaneously; ...
... • Hyphema (layered blood in the anterior chamber) • Microhyphema (non-layered RBC’s in the anterior chamber) – Complete hyphema: vision may be LP only – Blunt trauma (look for iris tears, iridodialysis) – Neovascularization from DM, uveitis, past intraocular surgery; tumors can bleed spontaneously; ...
Waves R` Us
... • No limit on wavelengths; different ranges have different names • Note opacity of atmosphere, it absorbs most radiation with just a few exceptions like some radio waves and visible light. - That is why astronomy detectors in other ranges need to be outside the atmosphere, in orbit. - Examples are ...
... • No limit on wavelengths; different ranges have different names • Note opacity of atmosphere, it absorbs most radiation with just a few exceptions like some radio waves and visible light. - That is why astronomy detectors in other ranges need to be outside the atmosphere, in orbit. - Examples are ...