First Presentation - Fundus Examination
... posterior pole and up to the mid periphery in the left eye and foveal granularity ...
... posterior pole and up to the mid periphery in the left eye and foveal granularity ...
posterior vitreous detachment - Adelaide Eye and Retina Centre
... dark when they move the eye. This is due to the partially separated jelly tugging on the retina where it remains attached in one or two places. Besides age other factors may contribute to a PVD, particularly nearsightedness and occasionally injuries to the eye. All patients who experience the sudden ...
... dark when they move the eye. This is due to the partially separated jelly tugging on the retina where it remains attached in one or two places. Besides age other factors may contribute to a PVD, particularly nearsightedness and occasionally injuries to the eye. All patients who experience the sudden ...
A View of Life
... The retina has three layers. – Layer closest to choroid contains rod cells and cone cells. – Middle layer contains bipolar cells. – Innermost layer contains ganglion cells. Only rod and cone cells are light-sensitive, thus light must penetrate to the back of the retina before they are stimulated. ...
... The retina has three layers. – Layer closest to choroid contains rod cells and cone cells. – Middle layer contains bipolar cells. – Innermost layer contains ganglion cells. Only rod and cone cells are light-sensitive, thus light must penetrate to the back of the retina before they are stimulated. ...
1) It turned out that an antibiotic furosemide selectively destroys
... a. is wider at the base end than at the apex b. is stiffer at the apex than the base c. responds to low frequencies at the apex d. is inflexible 9) A difference between rods and cones is: a. Rods hyperpolarize to light, while cones depolarize to light b. Cones do not use the effector enzyme phosphod ...
... a. is wider at the base end than at the apex b. is stiffer at the apex than the base c. responds to low frequencies at the apex d. is inflexible 9) A difference between rods and cones is: a. Rods hyperpolarize to light, while cones depolarize to light b. Cones do not use the effector enzyme phosphod ...
Senses ppt
... Photoreceptors and visual pigments - Rods and cones - stimulated when light reaches them - Rods are more sensitive to light than cones and provide vision in dim light. - Cones provide sharp images and color vision. Fovea centralis contains high concentration of cones but no rods. - Light sensitive p ...
... Photoreceptors and visual pigments - Rods and cones - stimulated when light reaches them - Rods are more sensitive to light than cones and provide vision in dim light. - Cones provide sharp images and color vision. Fovea centralis contains high concentration of cones but no rods. - Light sensitive p ...
Figure 15.1 The eye and accessory structures.
... Summary of muscle actions and innervating cranial nerves ...
... Summary of muscle actions and innervating cranial nerves ...
Special Senses
... Photoreceptors and visual pigments - Rods and cones - stimulated when light reaches them - Rods are more sensitive to light than cones and provide vision in dim light. - Cones provide sharp images and color vision. Fovea centralis contains high concentration of cones but no rods. - Light sensitive p ...
... Photoreceptors and visual pigments - Rods and cones - stimulated when light reaches them - Rods are more sensitive to light than cones and provide vision in dim light. - Cones provide sharp images and color vision. Fovea centralis contains high concentration of cones but no rods. - Light sensitive p ...
Deakin Research Online
... 701 retinochoroiditis, 558 inflammation, 552 imaging/image analysis: non-clinical ...
... 701 retinochoroiditis, 558 inflammation, 552 imaging/image analysis: non-clinical ...
L9_Eye
... Rods and cones photosensitive layer Outer limiting membrane Outer nuclear layer Outer plexiform layer Inner nuclear layer Inner plexiform layer Ganglion cell layer Optic nerve fiber layer Inner limiting membrane ...
... Rods and cones photosensitive layer Outer limiting membrane Outer nuclear layer Outer plexiform layer Inner nuclear layer Inner plexiform layer Ganglion cell layer Optic nerve fiber layer Inner limiting membrane ...
Sensation - marchman
... nearby objects are seen more clearly than distant objects because distant objects in front of retina Farsightedness- condition in which faraway objects are seen more clearly than near objects because the image of near objects is focused behind retina ...
... nearby objects are seen more clearly than distant objects because distant objects in front of retina Farsightedness- condition in which faraway objects are seen more clearly than near objects because the image of near objects is focused behind retina ...
Glossary of Vision Terms
... A condition in which the surface of the cornea is not spherical; causes a blurred image to be received at the retina. BINOCULAR VISION The blending of the separate images seen by each eye into a single image; allows images to be seen with depth. BLIND SPOT (1) A small area of the retina where the op ...
... A condition in which the surface of the cornea is not spherical; causes a blurred image to be received at the retina. BINOCULAR VISION The blending of the separate images seen by each eye into a single image; allows images to be seen with depth. BLIND SPOT (1) A small area of the retina where the op ...
Eye (iowa)
... The retina has 10 recognized layers. The main layers are outlined in this section. The outermost segment is the retinal pigmented epithelium. This cell layer contains melanin, and is responsible for light absorption. It is important to note that light travels through all 9 layers of the retina after ...
... The retina has 10 recognized layers. The main layers are outlined in this section. The outermost segment is the retinal pigmented epithelium. This cell layer contains melanin, and is responsible for light absorption. It is important to note that light travels through all 9 layers of the retina after ...
o Light hits object, bounces off, scatters and then the human eye
... the eye, where visual processing really begins o Receptors are at the very back, where light travels through other neural matter before reaching them – an accident? o This leads to a blind spot in ...
... the eye, where visual processing really begins o Receptors are at the very back, where light travels through other neural matter before reaching them – an accident? o This leads to a blind spot in ...
The EYE - Bishop Amat Memorial High School
... – Transport blood to / from retina – Enter/leave eye through center of Optic Nerve – Form highly branched network of vessels! ...
... – Transport blood to / from retina – Enter/leave eye through center of Optic Nerve – Form highly branched network of vessels! ...
ppt - CSUS
... ● Photoreceptors: light-sensitive cells – they send neural signals when light hits them ● photopigment: molecule that transforms when light hits it ● Rods: contain photopigment rhodopsin (sensitive to a broad range of light) - only allows black and white vision ● Cones: contain three different photo ...
... ● Photoreceptors: light-sensitive cells – they send neural signals when light hits them ● photopigment: molecule that transforms when light hits it ● Rods: contain photopigment rhodopsin (sensitive to a broad range of light) - only allows black and white vision ● Cones: contain three different photo ...
Retinal detachment surgery
... With the current surgical techniques, approximately 90% of all the RDs can be reapplied. Sometimes, more than one operation is needed. Approximately 40% of the RDs successfully treated reach a good vision, the rest reach variable vision levels that can be useful both for reading as well as walking a ...
... With the current surgical techniques, approximately 90% of all the RDs can be reapplied. Sometimes, more than one operation is needed. Approximately 40% of the RDs successfully treated reach a good vision, the rest reach variable vision levels that can be useful both for reading as well as walking a ...
Degrees, radians, retinal size and sampling
... Degrees, radians, retinal size and sampling When we open our eyes, an image of the world is projected onto the retinae. The intensity at each point in the image is converted to voltage by photoreceptors arrayed across each retina, and thus begins our perception of the world. In order to get a better ...
... Degrees, radians, retinal size and sampling When we open our eyes, an image of the world is projected onto the retinae. The intensity at each point in the image is converted to voltage by photoreceptors arrayed across each retina, and thus begins our perception of the world. In order to get a better ...
this PowerPoint - Mr. Hunsaker`s Classes
... • Feature Detector Cells – Specialized neurons in the brain that respond to specific features, such as shape, angle, or movement. – Get their name from the ability to respond to specific features – Pass information to teams of cells (supercell clusters) that respond to specific features. ...
... • Feature Detector Cells – Specialized neurons in the brain that respond to specific features, such as shape, angle, or movement. – Get their name from the ability to respond to specific features – Pass information to teams of cells (supercell clusters) that respond to specific features. ...
43 Physiology of visual analyzer
... Rhodopsin (retinal + opsin) is the visual pigment of rods. The absorption of light by rhodopsin initiates a signal-transduction pathway Receptor potential is hyperpolization . ...
... Rhodopsin (retinal + opsin) is the visual pigment of rods. The absorption of light by rhodopsin initiates a signal-transduction pathway Receptor potential is hyperpolization . ...
File chapter 5 vocab pp
... optic nerve leaves the eye. Because there are not rods or cones in this area, there is no vision here. ...
... optic nerve leaves the eye. Because there are not rods or cones in this area, there is no vision here. ...
Unit_4_sensation
... faraway objects are seen more clearly than near objects because the image of near objects is focused behind retina ...
... faraway objects are seen more clearly than near objects because the image of near objects is focused behind retina ...
EXPLORING PSYCHOLOGY (7th Edition in Modules) David Myers
... visual information and sends it to the brain. ...
... visual information and sends it to the brain. ...
Vision
... rhodopsin molecule can cause about 200 ion channels to close and change the membrane potential about 1 mV. Light adaptation. Magnitude of amplification varies according to level of illumination. Photoreceptors are most sensitive in dim light, less sensitive in bright light. This prevents them from s ...
... rhodopsin molecule can cause about 200 ion channels to close and change the membrane potential about 1 mV. Light adaptation. Magnitude of amplification varies according to level of illumination. Photoreceptors are most sensitive in dim light, less sensitive in bright light. This prevents them from s ...
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.