Microscopic structure of the retina and vasculature in the human eye
... and 3D relationship between microvasculature, glial cells and neurons in the retina at both the geographic distribution and cyto-architecture level. A major question that was considered was how to achieve the most efficient fixation and staining to minimise post mortem changes. We have used isolated ...
... and 3D relationship between microvasculature, glial cells and neurons in the retina at both the geographic distribution and cyto-architecture level. A major question that was considered was how to achieve the most efficient fixation and staining to minimise post mortem changes. We have used isolated ...
Haytac, P
... OD and gyrate atrophy OU • Persistent hyperplastic primary vitreous with narrow angle glaucoma OD and gyrate atrophy OU • Retinitis Pigmentosa OU with narrow angle glaucoma OD and gyrate atrophy OU ...
... OD and gyrate atrophy OU • Persistent hyperplastic primary vitreous with narrow angle glaucoma OD and gyrate atrophy OU • Retinitis Pigmentosa OU with narrow angle glaucoma OD and gyrate atrophy OU ...
2 MB - stellate ganglion block
... • difficult to palpate C7 tubercle • first palpate C6 tubercle and then should move one finger breath downwards to palpate C7 tubercle. • drug injected in the similar fashion. • The advantage of C7 anterior approach is that lesser volume of drug required • radio frequency ablation may be done by thi ...
... • difficult to palpate C7 tubercle • first palpate C6 tubercle and then should move one finger breath downwards to palpate C7 tubercle. • drug injected in the similar fashion. • The advantage of C7 anterior approach is that lesser volume of drug required • radio frequency ablation may be done by thi ...
c) gray matter protrusions found on the pons.
... 83) The autonomic nervous system is NOT involved in controlling a) exocrine glands. b) skeletal muscle. c) cardiac muscle. d) smooth muscle. e) endocrine glands. 84) Which of the following descriptions of a preganglionic neuron is NOT correct? a) Has axons that exit the CNS in a cranial or spinal n ...
... 83) The autonomic nervous system is NOT involved in controlling a) exocrine glands. b) skeletal muscle. c) cardiac muscle. d) smooth muscle. e) endocrine glands. 84) Which of the following descriptions of a preganglionic neuron is NOT correct? a) Has axons that exit the CNS in a cranial or spinal n ...
Pigment Epithelium-Derived Factor Gene Therapy Targeting Retinal
... ganglion cell injury. Gene transfer was achieved through subretinal injection of an SIV vector expressing human PEDF (SIV-hPEDF) into the eyes of 4-week-old Wistar rats. Two weeks after gene transfer, retinal ganglion cells were damaged by transient ocular hypertension stress (110 mmHg, 60 min) and ...
... ganglion cell injury. Gene transfer was achieved through subretinal injection of an SIV vector expressing human PEDF (SIV-hPEDF) into the eyes of 4-week-old Wistar rats. Two weeks after gene transfer, retinal ganglion cells were damaged by transient ocular hypertension stress (110 mmHg, 60 min) and ...
Eyes
... Choroid – provides vascularity to retina Pupil – variable-sized, black circular or slit shaped opening in the center of the iris that regulates the amount of light that enters the eye. Appears black because most of the light entering the pupil is absorbed by the tissues inside the eye. Lens – biconv ...
... Choroid – provides vascularity to retina Pupil – variable-sized, black circular or slit shaped opening in the center of the iris that regulates the amount of light that enters the eye. Appears black because most of the light entering the pupil is absorbed by the tissues inside the eye. Lens – biconv ...
Eyes
... Choroid – provides vascularity to retina Pupil – variable-sized, black circular or slit shaped opening in the center of the iris that regulates the amount of light that enters the eye. Appears black because most of the light entering the pupil is absorbed by the tissues inside the eye. Lens – biconv ...
... Choroid – provides vascularity to retina Pupil – variable-sized, black circular or slit shaped opening in the center of the iris that regulates the amount of light that enters the eye. Appears black because most of the light entering the pupil is absorbed by the tissues inside the eye. Lens – biconv ...
effect of non-steroidal anti-inflammatory drugs
... postoperative pain and pain associated with the musculoskeletal disorders. Since NSAIDs inhibit prostaglandin synthesis, they are equally recommended to treat allergic ocular disorders (12, 23). Several ophthalmic formulations of NSAIDs are marketed for topical use to manage pain and inflammation. C ...
... postoperative pain and pain associated with the musculoskeletal disorders. Since NSAIDs inhibit prostaglandin synthesis, they are equally recommended to treat allergic ocular disorders (12, 23). Several ophthalmic formulations of NSAIDs are marketed for topical use to manage pain and inflammation. C ...
Sensory receptors
... ear canal and provoke the vibration of the eardrum. This vibration is transferred to the ossicles that amplify it even more. From the oval window, the vibration passes to the liquids that fill the cochlea. The organ of Corti, runs through its inside. It consists of thousands of sensory hair cells, a ...
... ear canal and provoke the vibration of the eardrum. This vibration is transferred to the ossicles that amplify it even more. From the oval window, the vibration passes to the liquids that fill the cochlea. The organ of Corti, runs through its inside. It consists of thousands of sensory hair cells, a ...
HOC 1 - 15 Special Senses
... • Muscle that controls the size of the pupil & regulates amount of light entering eye ...
... • Muscle that controls the size of the pupil & regulates amount of light entering eye ...
The Achiever Dec 14 - Retina Australia Victoria
... researchers worldwide has the potential to revolutionise treatments for people with inherited retinal disease. Alex stated that currently about 60% of the retinal disease genes are known and he believes that within five years at least 80% will be known. Alex also mentioned that the team had recently ...
... researchers worldwide has the potential to revolutionise treatments for people with inherited retinal disease. Alex stated that currently about 60% of the retinal disease genes are known and he believes that within five years at least 80% will be known. Alex also mentioned that the team had recently ...
Analysis of progressive ophthalmic lesion in a patient with subacute
... R ESULTS . The patient showed no ophthalmic abnormalities until he developed a left homonymous hemianopia with sudden bilateral disturbed visual acuity. Severe progressive macular lesions including a pigment epithelial window defect by fluorescein angiography, a marked decrease in foveal thickness b ...
... R ESULTS . The patient showed no ophthalmic abnormalities until he developed a left homonymous hemianopia with sudden bilateral disturbed visual acuity. Severe progressive macular lesions including a pigment epithelial window defect by fluorescein angiography, a marked decrease in foveal thickness b ...
Microbiology 205 Exam 1 study guide
... 9. What do we mean by the terms psychrophiles, mesophiles, and thermophiles? What determines the temperature extremes beyond which cells can no longer function no matter how much time we allow those cells to adapt to the temperature extremes by evolution. 10. What is the difference between bacteria ...
... 9. What do we mean by the terms psychrophiles, mesophiles, and thermophiles? What determines the temperature extremes beyond which cells can no longer function no matter how much time we allow those cells to adapt to the temperature extremes by evolution. 10. What is the difference between bacteria ...
ANATOMY OF THE EAR
... Ductus reuniens—connects the vestibular areas to the auditory mechanism and allows the endolymph to circulate between these two areas. Basilar membrane—separates scala tympani from scala media Reisner’s membrane—separates scala vestibuli from scala media ...
... Ductus reuniens—connects the vestibular areas to the auditory mechanism and allows the endolymph to circulate between these two areas. Basilar membrane—separates scala tympani from scala media Reisner’s membrane—separates scala vestibuli from scala media ...
Chronic Superficial Keratitis (Pannus)
... Atropine – dilates eye, decreases pain Antibiotics – topically +/- systemically ...
... Atropine – dilates eye, decreases pain Antibiotics – topically +/- systemically ...
Hypermetropia - Peshawar Medical College, Peshawar Dental
... • Decreased visual acuity that improves with pinhole • The eyeball may be obviously small(hyperopia) or large (myopia) • The cornea my be conical in shape (irregular astigmatism (keratoconus) • Pupils are normal • Posterior segment may show abnormalities ...
... • Decreased visual acuity that improves with pinhole • The eyeball may be obviously small(hyperopia) or large (myopia) • The cornea my be conical in shape (irregular astigmatism (keratoconus) • Pupils are normal • Posterior segment may show abnormalities ...
Choosing Your Antiglare Filters Click here to save direct to your PC
... blue light waves. In the MultiLens and SunSafe range the 450 or 511 are usually the most effective. In the NoIR range the Spectra Shield 465 Yellow, or 505 Orange may prove most successful. The UV Shield 50 Yellow, 40 Amber or 21 Grey, are also successful. In cases of extreme glare problems the Mult ...
... blue light waves. In the MultiLens and SunSafe range the 450 or 511 are usually the most effective. In the NoIR range the Spectra Shield 465 Yellow, or 505 Orange may prove most successful. The UV Shield 50 Yellow, 40 Amber or 21 Grey, are also successful. In cases of extreme glare problems the Mult ...
Tear Film Layers - Texas Optometric Association
... What does the sphincter muscle control? Ciliary body is attached to suspensatory ligaments called? ...
... What does the sphincter muscle control? Ciliary body is attached to suspensatory ligaments called? ...
Frontal branch of facial nerve in relation to deep temporalis muscle
... a.ischemia to stria vascularis « ? b.ischemia of AICA ...
... a.ischemia to stria vascularis « ? b.ischemia of AICA ...
Blind/Visually Impaired
... so that light can pass through it. • Iris – The colored part of the eye. The function of the iris is to regulate the amount of light that enters the eye. • Lens – The lens changes shape, getting fatter or thinner in order to help focus the light on the back of the eye. This focusing ability of the e ...
... so that light can pass through it. • Iris – The colored part of the eye. The function of the iris is to regulate the amount of light that enters the eye. • Lens – The lens changes shape, getting fatter or thinner in order to help focus the light on the back of the eye. This focusing ability of the e ...
doc - IBSA Medical Diagnostics Form 2015
... Submitted data should include the report from the laboratory performing the tests, copies of the original data, the normative data range for that laboratory, and a statement specifying of the equipment used, and its calibration status. The tests should be performed as a minimum to the standards laid ...
... Submitted data should include the report from the laboratory performing the tests, copies of the original data, the normative data range for that laboratory, and a statement specifying of the equipment used, and its calibration status. The tests should be performed as a minimum to the standards laid ...
Toxicity of Hydrogen Peroxide and Ophthalmic Solutions Containing
... The MTT assay illustrated that the lower concentrations of H2O2 had higher numbers of absorbencies, showing that the majority of the cells did not die during the MTT assay. These cells turned from MTT yellow into a dark formazan blue. The wells containing formalin did not change color, because they ...
... The MTT assay illustrated that the lower concentrations of H2O2 had higher numbers of absorbencies, showing that the majority of the cells did not die during the MTT assay. These cells turned from MTT yellow into a dark formazan blue. The wells containing formalin did not change color, because they ...
Diabetic retinopathy screening NSF
... Key issues for discussion • Learn the normal anatomy of the optic nerve • Discuss the function of the optic nerve and its connection to the brain • Discuss major illnesses affecting the optic nerve • Discuss the main features of the glaucomatous changes of the optic nerve Learning outcome • Identify ...
... Key issues for discussion • Learn the normal anatomy of the optic nerve • Discuss the function of the optic nerve and its connection to the brain • Discuss major illnesses affecting the optic nerve • Discuss the main features of the glaucomatous changes of the optic nerve Learning outcome • Identify ...
Syntonic Phototherapy - International Light Association
... oxidation, inflammation, gene expression, and other basic physiologic functions.21 Clock mechanisms, sensitive to environmental light, have been identified in the brain as well as peripherally in organs, tissues, and cells throughout the body. Mounting evidence suggests the temporal ordering and pha ...
... oxidation, inflammation, gene expression, and other basic physiologic functions.21 Clock mechanisms, sensitive to environmental light, have been identified in the brain as well as peripherally in organs, tissues, and cells throughout the body. Mounting evidence suggests the temporal ordering and pha ...
Ear
... duct are alike. With further development, however, they form two ridges: the inner ridge ,the future spiral limbus ,and the outer ridge. ...
... duct are alike. With further development, however, they form two ridges: the inner ridge ,the future spiral limbus ,and the outer ridge. ...
Photoreceptor cell
A photoreceptor cell is a specialized type of neuron found in the retina that is capable of phototransduction. The great biological importance of photoreceptors is that they convert light (visible electromagnetic radiation) into signals that can stimulate biological processes. To be more specific, photoreceptor proteins in the cell absorb photons, triggering a change in the cell's membrane potential.The two classic photoreceptor cells are rods and cones, each contributing information used by the visual system to form a representation of the visual world, sight. The rods are narrower than the cones and distributed differently across the retina, but the chemical process in each that supports phototransduction is similar. A third class of photoreceptor cells was discovered during the 1990s: the photosensitive ganglion cells. These cells do not contribute to sight directly, but are thought to support circadian rhythms and pupillary reflex.There are major functional differences between the rods and cones. Rods are extremely sensitive, and can be triggered by a single photon. At very low light levels, visual experience is based solely on the rod signal. This explains why colors cannot be seen at low light levels: only one type of photoreceptor cell is active.Cones require significantly brighter light (i.e., a larger numbers of photons) in order to produce a signal. In humans, there are three different types of cone cell, distinguished by their pattern of response to different wavelengths of light. Color experience is calculated from these three distinct signals, perhaps via an opponent process. The three types of cone cell respond (roughly) to light of short, medium, and long wavelengths. Note that, due to the principle of univariance, the firing of the cell depends upon only the number of photons absorbed. The different responses of the three types of cone cells are determined by the likelihoods that their respective photoreceptor proteins will absorb photons of different wavelengths. So, for example, an L cone cell contains a photoreceptor protein that more readily absorbs long wavelengths of light (i.e., more ""red""). Light of a shorter wavelength can also produce the same response, but it must be much brighter to do so.The human retina contains about 120 million rod cells and 6 million cone cells. The number and ratio of rods to cones varies among species, dependent on whether an animal is primarily diurnal or nocturnal. Certain owls, such as the tawny owl, have a tremendous number of rods in their retinae. In addition, there are about 2.4 million to 3 million ganglion cells in the human visual system, the axons of these cells form the 2 optic nerves, 1 to 2% of them photosensitive.The pineal and parapineal glands are photoreceptive in non-mammalian vertebrates, but not in mammals. Birds have photoactive cerebrospinal fluid (CSF)-contacting neurons within the paraventricular organ that respond to light in the absence of input from the eyes or neurotransmitters. Invertebrate photoreceptors in organisms such as insects and molluscs are different in both their morphological organization and their underlying biochemical pathways. Described here are human photoreceptors.