Reid (D)
... Thus two factors argue against poor optics or retinal immaturity as the cause of immature geniculate receptive-field shapes19: first, these ganglion-cell receptive fields were smaller relative to most comparably aged geniculate receptive fields (Fig. 3) and, second, their shapes were adult-like (Gau ...
... Thus two factors argue against poor optics or retinal immaturity as the cause of immature geniculate receptive-field shapes19: first, these ganglion-cell receptive fields were smaller relative to most comparably aged geniculate receptive fields (Fig. 3) and, second, their shapes were adult-like (Gau ...
Chapter 9: The Sensory System
... inner ear. This stimulates the hearing receptors, located on the spiral organ in the cochlea, which send the information to the temporal lobe of the cerebrum. 33. Explain how the senses of taste and smell supplement one another. Ans: They work together to create a combined effect when interpreted by ...
... inner ear. This stimulates the hearing receptors, located on the spiral organ in the cochlea, which send the information to the temporal lobe of the cerebrum. 33. Explain how the senses of taste and smell supplement one another. Ans: They work together to create a combined effect when interpreted by ...
Retinal Pigment Epithelium as a Barrier in Drug Permeation and as
... Retinal pigment epithelium (RPE) is a unique monolayer of cells which lie between the neural retina and the choroid. It plays an essential role in maintaining visual acuity and metabolic integrity in the retina. As a part of the blood-retina barrier, RPE restricts the molecules from blood flow and o ...
... Retinal pigment epithelium (RPE) is a unique monolayer of cells which lie between the neural retina and the choroid. It plays an essential role in maintaining visual acuity and metabolic integrity in the retina. As a part of the blood-retina barrier, RPE restricts the molecules from blood flow and o ...
Sheep Eye Dissection
... which method (diagram, model, dissection) do you think helped you to understand the parts of the eye the most? Why? ...
... which method (diagram, model, dissection) do you think helped you to understand the parts of the eye the most? Why? ...
Macular Function
... All clinicians know that the appearance of the macula can be misleading: one that looks highly irregular may have excellent visual potential. For that reason, it is essential to test cataract patients’ macular potential to aid in surgical decision making. I would argue that retinal function testing ...
... All clinicians know that the appearance of the macula can be misleading: one that looks highly irregular may have excellent visual potential. For that reason, it is essential to test cataract patients’ macular potential to aid in surgical decision making. I would argue that retinal function testing ...
D-ACE surgical sequence for selected bullous retinal detachments
... break from displacement of the air bubble into the retrohyaloid space. In 45 eyes retinal reattachment was maintained throughout the follow-up interval and, with a single exception (see below), was associated with visoal improvement. The extent of visual recovery reflected the duration of macular de ...
... break from displacement of the air bubble into the retrohyaloid space. In 45 eyes retinal reattachment was maintained throughout the follow-up interval and, with a single exception (see below), was associated with visoal improvement. The extent of visual recovery reflected the duration of macular de ...
Introduction to Retinal Vascular Disease
... Giant cell arteritis. (From Kaiser PK, Friedman NJ, Pineda R, II. The Massachusetts Eye and Ear Infirmary illustrated manual of ophthalmology. 2nd edition. China: Saunders; 2004 ...
... Giant cell arteritis. (From Kaiser PK, Friedman NJ, Pineda R, II. The Massachusetts Eye and Ear Infirmary illustrated manual of ophthalmology. 2nd edition. China: Saunders; 2004 ...
Williams, D.R. (2011) - advanced retinal imaging alliance
... (Williams, 1985, 1988). Artal and Navarro (1989) wondered whether another variant of interferometry, based on the interference of light returning from the retina rather than light entering the eye, could be used to estimate the spacing of cones in the living eye. Their approach was derived from a te ...
... (Williams, 1985, 1988). Artal and Navarro (1989) wondered whether another variant of interferometry, based on the interference of light returning from the retina rather than light entering the eye, could be used to estimate the spacing of cones in the living eye. Their approach was derived from a te ...
Permeability of Ocular Vessels and Transport Across the
... ecules from entering the extravascular spaces of the retina and the brain. * by preventing uncontrolled escape of important ions from nervous tissue. Due to these barriers there is a need for specific carrier-mediated mechanisms for the exchange of nutrients and metabolites through the cells. Sinc� ...
... ecules from entering the extravascular spaces of the retina and the brain. * by preventing uncontrolled escape of important ions from nervous tissue. Due to these barriers there is a need for specific carrier-mediated mechanisms for the exchange of nutrients and metabolites through the cells. Sinc� ...
Gross Anatomy SESSION 13 Dr. Firas M. Ghazi Orbital region
... 1. Define the orbital region and review the location of its main content 2. Recall the location, boundaries and landmarks of orbit and the spaces related 3. Outline the layered structure of the eyelids and the muscles acting on it 4. Describe the conjunctival sac and its functional importance 5. Lis ...
... 1. Define the orbital region and review the location of its main content 2. Recall the location, boundaries and landmarks of orbit and the spaces related 3. Outline the layered structure of the eyelids and the muscles acting on it 4. Describe the conjunctival sac and its functional importance 5. Lis ...
Meningiomas*
... Treatment options vary by individual case and include surgery, radiation, and close observation. Surgery is considered for any patient with a symptomatic or growing tumor. The goal is either complete rese ...
... Treatment options vary by individual case and include surgery, radiation, and close observation. Surgery is considered for any patient with a symptomatic or growing tumor. The goal is either complete rese ...
binocular vision - Department of Ophthalmology and Visual Sciences
... It is the smallest binocular disparity that can be readily detected i.e. it is the minimum disparity beyond which no stereoscopic effect is produced. There are no standardized clinical stereoscopic acuity tests, but generally speaking, a threshold of 15 –30 arc sec. can be regarded as excellent. Sin ...
... It is the smallest binocular disparity that can be readily detected i.e. it is the minimum disparity beyond which no stereoscopic effect is produced. There are no standardized clinical stereoscopic acuity tests, but generally speaking, a threshold of 15 –30 arc sec. can be regarded as excellent. Sin ...
Vitreous fluorophotometry evaluation of xenon
... reached, after heavy photocogulation, very high values (approximately 2 X 10~3 cm/hr). These ...
... reached, after heavy photocogulation, very high values (approximately 2 X 10~3 cm/hr). These ...
eye conditions/diseases/terms
... Thickened portion of the vascular tunic of the eye between the choroid and the iris; composed of ciliary processes, which produce aqueous humor, and the ciliary muscle, which maintains lens shape and intraocular pressure. Clinical low vision assessment Evaluation of remaining vision and its use. The ...
... Thickened portion of the vascular tunic of the eye between the choroid and the iris; composed of ciliary processes, which produce aqueous humor, and the ciliary muscle, which maintains lens shape and intraocular pressure. Clinical low vision assessment Evaluation of remaining vision and its use. The ...
Insulin-like growth factor II may play a local role in the
... We have shown that IGF-II expression by head mesoderm intensifies in the periocular mesoderm as it condenses and differentiates to form the outer collagenous coat of the developing eye. This expression rises from E14, to a peak before birth, and declines after parturition to undetectable levels in t ...
... We have shown that IGF-II expression by head mesoderm intensifies in the periocular mesoderm as it condenses and differentiates to form the outer collagenous coat of the developing eye. This expression rises from E14, to a peak before birth, and declines after parturition to undetectable levels in t ...
Optical Coherence Tomography and Advanced Fundus Imaging
... parallel lines), providing 2D images. The light is monochromatic and resulting images are also monochromatic, although pseudo-color mapping may be produced by instrument software. By varying the wavelength of the laser used, imaging can be carried out at those wavelengths that give most informat ...
... parallel lines), providing 2D images. The light is monochromatic and resulting images are also monochromatic, although pseudo-color mapping may be produced by instrument software. By varying the wavelength of the laser used, imaging can be carried out at those wavelengths that give most informat ...
Anatomy of the Eye, Conditions, and Functional Implications
... ◦ Innervated by the 3rd CN ◦ Move eye up (also in and intorts) ◦ Innervated by the 3rd CN ...
... ◦ Innervated by the 3rd CN ◦ Move eye up (also in and intorts) ◦ Innervated by the 3rd CN ...
Calcium Oxalate Retinopathy Associated with
... However, in an occasional micrograph, such as Fig. 4, D, the space occupied by the crystal appears to be entirely within the confines of one pigment epithelial cell at least in the plane of this particular section. It is our impression that the crystals may form intracellularly in pigment epithelial ...
... However, in an occasional micrograph, such as Fig. 4, D, the space occupied by the crystal appears to be entirely within the confines of one pigment epithelial cell at least in the plane of this particular section. It is our impression that the crystals may form intracellularly in pigment epithelial ...
Review of Central and Branch Retinal Vein Occlusions
... continues to play a critical role in cases of neovascularization affecting the retina and anterior segment. It is an exciting era in the treatment of retinal vein occlusions with a future that may allow combination therapy to be given in extended-release devices. ...
... continues to play a critical role in cases of neovascularization affecting the retina and anterior segment. It is an exciting era in the treatment of retinal vein occlusions with a future that may allow combination therapy to be given in extended-release devices. ...
Physiology and function of the cranial nerves - Wk 1-2
... directions. Thus, during convergence onto a near object both eyes move toward the nose; the movement is horizontal, but disjunctive, by contrast with the conjugate movement when both eyes move, say, to the right. The disjunctive movement of convergence can be carried out voluntarily, but the act is ...
... directions. Thus, during convergence onto a near object both eyes move toward the nose; the movement is horizontal, but disjunctive, by contrast with the conjugate movement when both eyes move, say, to the right. The disjunctive movement of convergence can be carried out voluntarily, but the act is ...
Results of the Application of the Method of
... also brought results in patients with TRA, both peripheral and central. Moreover, the improvement of visual functions was noted in developed and advanced stages of disease. Very good results were obtained with non-complicated myopia of mild and medium grades. Despite the refractive stability, 80% of ...
... also brought results in patients with TRA, both peripheral and central. Moreover, the improvement of visual functions was noted in developed and advanced stages of disease. Very good results were obtained with non-complicated myopia of mild and medium grades. Despite the refractive stability, 80% of ...
Harrison`s Principles of Internal Medicine, 16 Edition
... receptors: rods and cones. In the human retina there are 100 million rods and 5 million cones. The rods operate in dim (scotopic) illumination. The cones function under daylight (photopic) conditions. The cone system is specialized for color perception and high spatial resolution. The majority of co ...
... receptors: rods and cones. In the human retina there are 100 million rods and 5 million cones. The rods operate in dim (scotopic) illumination. The cones function under daylight (photopic) conditions. The cone system is specialized for color perception and high spatial resolution. The majority of co ...
ARVO 2016 Annual Meeting Abstracts 334 Eye and pregnancy
... Emily Y. Chew. National Eye Inst/NIH, Bethesda, MD. Presentation Description: During pregnancy, hematologic, metabolic, hormonal, cardiovascular as well as immunologic changes occur and retinal diseases may be affected through these mechanisms. The most common retinal disease to be affected during p ...
... Emily Y. Chew. National Eye Inst/NIH, Bethesda, MD. Presentation Description: During pregnancy, hematologic, metabolic, hormonal, cardiovascular as well as immunologic changes occur and retinal diseases may be affected through these mechanisms. The most common retinal disease to be affected during p ...
The Special Sense - Dr Masoud Sirati Nir
... EXERCISE 14-3 Put an X in the True or False column next to each statement. Statement TrueFalse 1. When a disorder is classified as “corneal” it signifies that it's situated ___ ___ outside the eye. 2. The abbreviations for the right eye and left eye are OD and OS, ___ ___ respectively. 3. The abbrev ...
... EXERCISE 14-3 Put an X in the True or False column next to each statement. Statement TrueFalse 1. When a disorder is classified as “corneal” it signifies that it's situated ___ ___ outside the eye. 2. The abbreviations for the right eye and left eye are OD and OS, ___ ___ respectively. 3. The abbrev ...
The Special Sense - Dr Masoud Sirati Nir
... EXERCISE 14-3 Put an X in the True or False column next to each statement. Statement TrueFalse 1. When a disorder is classified as “corneal” it signifies that it's situated ___ ___ outside the eye. 2. The abbreviations for the right eye and left eye are OD and OS, ___ ___ respectively. 3. The abbrev ...
... EXERCISE 14-3 Put an X in the True or False column next to each statement. Statement TrueFalse 1. When a disorder is classified as “corneal” it signifies that it's situated ___ ___ outside the eye. 2. The abbreviations for the right eye and left eye are OD and OS, ___ ___ respectively. 3. The abbrev ...
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.