THE EYES OF IPNOPS M%IRRAYI
... the hexagonal rods rest on the inside of is a layer cons~stingof nerve fibres. The layers of the bowl-shaped pigment cells. However, the pig- nuclei, the inner nuclear layer and the gangl~oncell ment cells are not bowl-shaped, and the rods do not layer. which are normally found inside the outer reac ...
... the hexagonal rods rest on the inside of is a layer cons~stingof nerve fibres. The layers of the bowl-shaped pigment cells. However, the pig- nuclei, the inner nuclear layer and the gangl~oncell ment cells are not bowl-shaped, and the rods do not layer. which are normally found inside the outer reac ...
The Eye
... It is a delicate membrane, which continues posterior and joins to the optic nerve Two special types of light-sensing cells are in the retina; they contain photo pigments, which cause a chemical change when light hits them 1. Cones: used mainly for light vision 2. Are sensitive to color; located in a ...
... It is a delicate membrane, which continues posterior and joins to the optic nerve Two special types of light-sensing cells are in the retina; they contain photo pigments, which cause a chemical change when light hits them 1. Cones: used mainly for light vision 2. Are sensitive to color; located in a ...
Sensory
... 2. Rotate the eye until the larger bulge or lacrimal (tear) gland is on the top of the eye. The eye is now in the position it would be in a body as you face the body. 3. On the outside of the eye, note the fat that surrounds the eye and cushions it from shock. The lacrimal gland forms a bulge on the ...
... 2. Rotate the eye until the larger bulge or lacrimal (tear) gland is on the top of the eye. The eye is now in the position it would be in a body as you face the body. 3. On the outside of the eye, note the fat that surrounds the eye and cushions it from shock. The lacrimal gland forms a bulge on the ...
the eye and vision
... adequately stimulated the ganglion cells generate nerve impulses that are ultimately transmitted to the optic cortex of the brain. Vision is the result. The photoreceptor cells are distributed over the entire neural retina, except where the optic nerve (the bundled axons of the ganglion cells) leave ...
... adequately stimulated the ganglion cells generate nerve impulses that are ultimately transmitted to the optic cortex of the brain. Vision is the result. The photoreceptor cells are distributed over the entire neural retina, except where the optic nerve (the bundled axons of the ganglion cells) leave ...
Anatomy of The Eye
... The iris divided the space between the lens and cornea into anterior and posterior chambers tat communicate through pupil and filled with, aqueous humor (a clear watery fluid). ...
... The iris divided the space between the lens and cornea into anterior and posterior chambers tat communicate through pupil and filled with, aqueous humor (a clear watery fluid). ...
Nerve activates contraction
... Thick white connective tissue layer Seen anteriorly as the “white of the eye” Cornea Transparent, central anterior portion Allows for light to pass through Most exposed part Repairs itself easily the only human tissue that can be transplanted without fear of rejection When touched ...
... Thick white connective tissue layer Seen anteriorly as the “white of the eye” Cornea Transparent, central anterior portion Allows for light to pass through Most exposed part Repairs itself easily the only human tissue that can be transplanted without fear of rejection When touched ...
The Ear
... consistency becomes more liquid causes shrinking and pulling away from interior surface of eye. This can cast shadows on your retina, which you interpret as eye floaters. • If you notice a sudden increase in number of floaters, contact an eye doctor immediately — especially if you see flashes of ...
... consistency becomes more liquid causes shrinking and pulling away from interior surface of eye. This can cast shadows on your retina, which you interpret as eye floaters. • If you notice a sudden increase in number of floaters, contact an eye doctor immediately — especially if you see flashes of ...
eye anatomy - Madison Area Technical College
... vary from minimal to lots. Look to see if there are any remnants of the extrinsic muscles, eyelid, or lacrimal glands. Note the tough, white outer sclera and the transparent anterior cornea. Examine the back of the eyeball to locate the stub of the optic nerve. If the cornea is still relatively clea ...
... vary from minimal to lots. Look to see if there are any remnants of the extrinsic muscles, eyelid, or lacrimal glands. Note the tough, white outer sclera and the transparent anterior cornea. Examine the back of the eyeball to locate the stub of the optic nerve. If the cornea is still relatively clea ...
Special Senses
... This creates a pull on the gell which slides over the hair cells causing them to bend Once the hair cells are activated by this impulses are sent along the vestibular nerve. ...
... This creates a pull on the gell which slides over the hair cells causing them to bend Once the hair cells are activated by this impulses are sent along the vestibular nerve. ...
EYE2
... (O¯ -ra ser-RA¯ -ta), the jagged anterior margin of the retina, to a point just posterior to the junction of the sclera and cornea. Like the choroid, the ciliary body appears dark brown in color because it contains melanin-producing melanocytes. In addition, the ciliary body consists of ciliary proc ...
... (O¯ -ra ser-RA¯ -ta), the jagged anterior margin of the retina, to a point just posterior to the junction of the sclera and cornea. Like the choroid, the ciliary body appears dark brown in color because it contains melanin-producing melanocytes. In addition, the ciliary body consists of ciliary proc ...
Chapter 17 Special Senses
... • Modified anteriorly into two structures – Ciliary body—smooth muscle attached to lens – Iris—regulates amount of light entering eye • Pigmented layer that gives eye color • Pupil—rounded opening in the iris ...
... • Modified anteriorly into two structures – Ciliary body—smooth muscle attached to lens – Iris—regulates amount of light entering eye • Pigmented layer that gives eye color • Pupil—rounded opening in the iris ...
Summer 2010
... The function of the cones is to perceive fine detail, color, and objects in low light. The function of the rods is to perceive movement, color, and objects in low light. The function of the cones is to perceive fine detail, color, and objects positioned in the central portion of vision. The function ...
... The function of the cones is to perceive fine detail, color, and objects in low light. The function of the rods is to perceive movement, color, and objects in low light. The function of the cones is to perceive fine detail, color, and objects positioned in the central portion of vision. The function ...
Nerve activates contraction
... the lens and cornea Similar to blood plasma Helps maintain intraocular pressure Provides nutrients for the lens and cornea Reabsorbed into venous blood through the canal of Schlemm ...
... the lens and cornea Similar to blood plasma Helps maintain intraocular pressure Provides nutrients for the lens and cornea Reabsorbed into venous blood through the canal of Schlemm ...
Chapter 8 Special Senses
... If the image is focused at the spot where the optic disk is located, nothing will be seen. This is known as the blind spot. There are no photoreceptors there, as nerves and blood vessels pass through this point. ...
... If the image is focused at the spot where the optic disk is located, nothing will be seen. This is known as the blind spot. There are no photoreceptors there, as nerves and blood vessels pass through this point. ...
Chapter 8 Special Senses
... If the image is focused at the spot where the optic disk is located, nothing will be seen. This is known as the blind spot. There are no photoreceptors there, as nerves and blood vessels pass through this point. ...
... If the image is focused at the spot where the optic disk is located, nothing will be seen. This is known as the blind spot. There are no photoreceptors there, as nerves and blood vessels pass through this point. ...
The Human Eye
... • If you're nearsighted, your prescription is a negative number • The higher the numeral, the stronger your lenses will be • If your glasses or contact lens prescription begins with plus numbers, like +2.50, you are farsighted ...
... • If you're nearsighted, your prescription is a negative number • The higher the numeral, the stronger your lenses will be • If your glasses or contact lens prescription begins with plus numbers, like +2.50, you are farsighted ...
The Eye and Vision
... general outlines of objects give less precise images because nerve fibers from many rods converge, their impulses are transmitted to the brain on the same nerve fiber 2. Cones – have short, blunt projections; detect color; provide sharp images ...
... general outlines of objects give less precise images because nerve fibers from many rods converge, their impulses are transmitted to the brain on the same nerve fiber 2. Cones – have short, blunt projections; detect color; provide sharp images ...
of the eye.
... • The lens is clear & elastic (flexible) meaning it can change its shape to focus. – This is called accommodation. ...
... • The lens is clear & elastic (flexible) meaning it can change its shape to focus. – This is called accommodation. ...
Eye External Anatomy of Eye Accessory Structures
... a network of blood vessels that supply oxygen and nutrients to the tissues of the eye. l located deep to the sclera l contains a pigmented layer (melanin) that helps absorb excess light and prevents internal reflection l ...
... a network of blood vessels that supply oxygen and nutrients to the tissues of the eye. l located deep to the sclera l contains a pigmented layer (melanin) that helps absorb excess light and prevents internal reflection l ...
Basic Anatomy - e
... eyes blue; more pigment makes the eyes brown. The iris is an adjustable diaphragm around an opening called the pupil. ...
... eyes blue; more pigment makes the eyes brown. The iris is an adjustable diaphragm around an opening called the pupil. ...
The Human Eye and the colourful world
... Cannot see the distant objects clearly. The far point is less than infinity. The causes: High converging power of eyelens. Or The Eye ball being too long. In an eye suffering from Myopia, the ciliary muscles do not relax sufficiently,to make the lens low converging power. And the lens thin. In anoth ...
... Cannot see the distant objects clearly. The far point is less than infinity. The causes: High converging power of eyelens. Or The Eye ball being too long. In an eye suffering from Myopia, the ciliary muscles do not relax sufficiently,to make the lens low converging power. And the lens thin. In anoth ...
Lecture notes for Chapter 15
... Axons of retinal ganglion cells form optic nerve Medial fibers of optic nerve decussate at optic chiasma Most fibers of optic tracts continue to lateral geniculate body of thalamus Fibers from thalamic neurons form optic radiation and project to primary visual cortex in occipital lobes ...
... Axons of retinal ganglion cells form optic nerve Medial fibers of optic nerve decussate at optic chiasma Most fibers of optic tracts continue to lateral geniculate body of thalamus Fibers from thalamic neurons form optic radiation and project to primary visual cortex in occipital lobes ...
special senses
... inside the eye. ■ acts as phagocytes to remove dead or damaged receptor cells ■ Stores vitamin A ○ neural layer - transparent inner layer containing photoreceptors - rods and cones ...
... inside the eye. ■ acts as phagocytes to remove dead or damaged receptor cells ■ Stores vitamin A ○ neural layer - transparent inner layer containing photoreceptors - rods and cones ...
Eye
Eyes are the organs of vision. They detect light and convert it into electro-chemical impulses in neurons. In higher organisms, the eye is a complex optical system which collects light from the surrounding environment, regulates its intensity through a diaphragm, focuses it through an adjustable assembly of lenses to form an image, converts this image into a set of electrical signals, and transmits these signals to the brain through complex neural pathways that connect the eye via the optic nerve to the visual cortex and other areas of the brain. Eyes with resolving power have come in ten fundamentally different forms, and 96% of animal species possess a complex optical system. Image-resolving eyes are present in molluscs, chordates and arthropods.The simplest ""eyes"", such as those in microorganisms, do nothing but detect whether the surroundings are light or dark, which is sufficient for the entrainment of circadian rhythms. From more complex eyes, retinal photosensitive ganglion cells send signals along the retinohypothalamic tract to the suprachiasmatic nuclei to effect circadian adjustment and to the pretectal area to control the pupillary light reflex.