Eye - KingsfieldBiology
... • different colours are perceived as a result of the degree of stimulation of the blue + green + red cones (i.e. colours are the result of the mixture of inputs from all three cone types) • By population, about 64% of the cones are ...
... • different colours are perceived as a result of the degree of stimulation of the blue + green + red cones (i.e. colours are the result of the mixture of inputs from all three cone types) • By population, about 64% of the cones are ...
Systematic Approach to a Case of Disc Pallor
... compartments and significant overlap of diagnosis exists between each age group. Glaucoma can present with disc pallor at any age and has been deliberately omitted from the list and further discussion. The table depicts the causes for disc pallor categorized by age group of presentation. Gender This ...
... compartments and significant overlap of diagnosis exists between each age group. Glaucoma can present with disc pallor at any age and has been deliberately omitted from the list and further discussion. The table depicts the causes for disc pallor categorized by age group of presentation. Gender This ...
... the orbit. This probably resulted in forward propulpenetrating or leaving the conjunctiva intact.'2 In sion of the globe, and the retrobulbar haemorrhage Turner's13 series the frequency of complete or incom- which occurred caused rapid proptosis. This may plete injuries of the optic nerve was about ...
Glaucoma Diagnosis, Treatment
... Next, we must evaluate the current status of the eye: the visual acuity and IOP, the optic nerves, the peripheral visual field, and the thickness of the cornea. The diagnosis of glaucoma, however, is made over time looking for changes in the visual fields and the optic nerves over months and years. ...
... Next, we must evaluate the current status of the eye: the visual acuity and IOP, the optic nerves, the peripheral visual field, and the thickness of the cornea. The diagnosis of glaucoma, however, is made over time looking for changes in the visual fields and the optic nerves over months and years. ...
A Review of the Vascular Anatomy of the Optic Nerve Head
... freely anastomose. There are also no lymphatic vessels or lymphoid tissue. Venous drainage of the optic nerve head is much simpler than its arterial supply. Venules drain into the central vein of the retina formed by tributaries that accompany the arteries, being onethird to one-fourth larger [1]. O ...
... freely anastomose. There are also no lymphatic vessels or lymphoid tissue. Venous drainage of the optic nerve head is much simpler than its arterial supply. Venules drain into the central vein of the retina formed by tributaries that accompany the arteries, being onethird to one-fourth larger [1]. O ...
A Review of the Vascular Anatomy of the Optic Nerve Head
... anastomose. There are also no lymphatic vessels or lymphoid tissue. Venous drainage of the optic nerve head is much simpler than its arterial supply. Venules drain into the central vein of the retina formed by tributaries that accompany the arteries, being onethird to one-fourth larger [1]. Occasion ...
... anastomose. There are also no lymphatic vessels or lymphoid tissue. Venous drainage of the optic nerve head is much simpler than its arterial supply. Venules drain into the central vein of the retina formed by tributaries that accompany the arteries, being onethird to one-fourth larger [1]. Occasion ...
Disc case studies – Part 2
... fibres and the nasal step would immediately lead one to suspect normal-tension glaucoma or possibly a non-arteric anterior ischaemic optic neuropathy. The left visual field plot revealed no visual field defect and the GDx plot showed a lovely ‘hour glass’ appearance with no loss of nerve fibres. The ...
... fibres and the nasal step would immediately lead one to suspect normal-tension glaucoma or possibly a non-arteric anterior ischaemic optic neuropathy. The left visual field plot revealed no visual field defect and the GDx plot showed a lovely ‘hour glass’ appearance with no loss of nerve fibres. The ...
ophth-notes - WordPress.com
... Tears/lacrimal fluid made by lacrimal gland S/T Lacrimal gland alone innervated by facial nerve as a reflex but produced by various other structures; e.g. meibomian gland, lacrimal gland etc. 1.2ul/min produced with approx. 6uL within the eye at any time Drainage occurs via S and I punctum, via ampu ...
... Tears/lacrimal fluid made by lacrimal gland S/T Lacrimal gland alone innervated by facial nerve as a reflex but produced by various other structures; e.g. meibomian gland, lacrimal gland etc. 1.2ul/min produced with approx. 6uL within the eye at any time Drainage occurs via S and I punctum, via ampu ...
Senses ppt
... receptors (neurons). They regenerate every month. Exception to the rule that mature neurons are not replaced. Olfactory bulb and tract. Taste and smell centers lie very close together in the brain (primary olfactory cortex) ...
... receptors (neurons). They regenerate every month. Exception to the rule that mature neurons are not replaced. Olfactory bulb and tract. Taste and smell centers lie very close together in the brain (primary olfactory cortex) ...
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 ...
Ischemic Optic Neuropathy After Spine Surgery
... 60 years or older and has a female prevalence, with its etiology being temporal arteritis. Arteritic AION is emergent and if left untreated can lead to permanent blindness.6 • Posterior Ischemic Optic Neuropathy. Posterior ION manifests itself as acute loss of vision with visual field deficiencies a ...
... 60 years or older and has a female prevalence, with its etiology being temporal arteritis. Arteritic AION is emergent and if left untreated can lead to permanent blindness.6 • Posterior Ischemic Optic Neuropathy. Posterior ION manifests itself as acute loss of vision with visual field deficiencies a ...
Special Senses
... receptors (neurons). They regenerate every month. Exception to the rule that mature neurons are not replaced. Olfactory bulb and tract. Taste and smell centers lie very close together in the brain (primary olfactory cortex) ...
... receptors (neurons). They regenerate every month. Exception to the rule that mature neurons are not replaced. Olfactory bulb and tract. Taste and smell centers lie very close together in the brain (primary olfactory cortex) ...
Eye (iowa)
... The retina: A.2.1 Visual Angle. “The size of an image on the retina is measured in terms of visual angle. The visual angle of an object depends on (a) its size and (b) its distance from the eye; try setting these with the controls [in the computer monitor] and see how they affect the image on the re ...
... The retina: A.2.1 Visual Angle. “The size of an image on the retina is measured in terms of visual angle. The visual angle of an object depends on (a) its size and (b) its distance from the eye; try setting these with the controls [in the computer monitor] and see how they affect the image on the re ...
External Anatomy of the Eye
... Accommodation of the Lens for near vision • Ciliary muscles contract • Ciliary body pulls forward and inward • Tension on suspensory ligaments of lens is decreased • Lens becomes thicker (rounder) due to its ...
... Accommodation of the Lens for near vision • Ciliary muscles contract • Ciliary body pulls forward and inward • Tension on suspensory ligaments of lens is decreased • Lens becomes thicker (rounder) due to its ...
Special Senses
... • CONES are the least numerous, adapted for bright light, color, and detail. • RODS are sensitive for low light vision, but are color blind. • Domestic animals can see colors, but most have very few cones. This allows them to see with the quality of an old colored photograph that has been over exp ...
... • CONES are the least numerous, adapted for bright light, color, and detail. • RODS are sensitive for low light vision, but are color blind. • Domestic animals can see colors, but most have very few cones. This allows them to see with the quality of an old colored photograph that has been over exp ...
External Anatomy of the Eye
... Accommodation of the Lens for near vision • Ciliary muscles contract • Ciliary body pulls forward and inward • Tension on suspensory ligaments of lens is decreased • Lens becomes thicker (rounder) due to its ...
... Accommodation of the Lens for near vision • Ciliary muscles contract • Ciliary body pulls forward and inward • Tension on suspensory ligaments of lens is decreased • Lens becomes thicker (rounder) due to its ...
Functions of the eye parts
... The retina is made up of transparent, sensory and nervous tissue carrying blood vessels, nerve cells and nerve fibers. At the back of the retina, the nerve fibers all come together and emerge as the optic nerve. The nerve endings on the inside of the wall of the retina terminate in light-sensitive c ...
... The retina is made up of transparent, sensory and nervous tissue carrying blood vessels, nerve cells and nerve fibers. At the back of the retina, the nerve fibers all come together and emerge as the optic nerve. The nerve endings on the inside of the wall of the retina terminate in light-sensitive c ...
The Identification and Management of Eye Condtions at
... with this eye condition cannot be allowed to partake in contact sports such as soccer, rugby, netball, diving, etc. This may cause retinal tears or detachment resulting in permanent loss of vision. Treatment with eye drops and/or systemic medication (tablets) to regulate intra-ocular pressure. Regu ...
... with this eye condition cannot be allowed to partake in contact sports such as soccer, rugby, netball, diving, etc. This may cause retinal tears or detachment resulting in permanent loss of vision. Treatment with eye drops and/or systemic medication (tablets) to regulate intra-ocular pressure. Regu ...
Traumatic partial optic nerve avulsion with luxated globe
... 1. Orbital infections. 2. Subarachnoid hemorrhage due to severance of the ophthalmic artery. 3. Meningitis 4. Cerebrospinal fluid leakage. 5. Life threatening hypothalamic dysfunction. 6. With posterior avulsions, chiasmal injuries and residual visual field defects occurs in the follow eye. 7. Phthisi ...
... 1. Orbital infections. 2. Subarachnoid hemorrhage due to severance of the ophthalmic artery. 3. Meningitis 4. Cerebrospinal fluid leakage. 5. Life threatening hypothalamic dysfunction. 6. With posterior avulsions, chiasmal injuries and residual visual field defects occurs in the follow eye. 7. Phthisi ...
Leukocoria in an off-set picture in a healthy eye
... retina or from a reflective opacification within the ocular media along the visual axis at the pupillary area.1 The appearance of leukocoria should never be ignored or overlooked as the eye may harbour a life-threatening tumour, most notably retinoblastoma. Ordinarily urgent referral to an ophthalmo ...
... retina or from a reflective opacification within the ocular media along the visual axis at the pupillary area.1 The appearance of leukocoria should never be ignored or overlooked as the eye may harbour a life-threatening tumour, most notably retinoblastoma. Ordinarily urgent referral to an ophthalmo ...
references - isa kanyakumari
... loss from RAO. Local anaesthetic infiltration with adrenaline for nasal septal surgery can cause partial or total visual loss defects attributable to RAO.[8] This could be due to accidental injection of the drug into the branches of external carotid artery. Fat injected into the orbit for cosmetic ...
... loss from RAO. Local anaesthetic infiltration with adrenaline for nasal septal surgery can cause partial or total visual loss defects attributable to RAO.[8] This could be due to accidental injection of the drug into the branches of external carotid artery. Fat injected into the orbit for cosmetic ...
presentation source
... THE VISUAL SYSTEM SENSES ELEECTROMAGNETIC RADIATION ELECTROMAGNETIC RADIATION (EMR) SPANS THE ELECTROMAGNETIC SPECTRUM (EMS) FROM RADIO WAVES (VERY LONG) TO RADIATION (VERY SHORT) VISIBLE LIGHT IS A SMALL PORTION OF THE SPECTRUM PHOTONS OF LIGHT INTERACT WITH MATTER ...
... THE VISUAL SYSTEM SENSES ELEECTROMAGNETIC RADIATION ELECTROMAGNETIC RADIATION (EMR) SPANS THE ELECTROMAGNETIC SPECTRUM (EMS) FROM RADIO WAVES (VERY LONG) TO RADIATION (VERY SHORT) VISIBLE LIGHT IS A SMALL PORTION OF THE SPECTRUM PHOTONS OF LIGHT INTERACT WITH MATTER ...
general introduction
... Section 4 vertigo and deafness Ⅷ cranial nerve: vestibular nerve cochlear nerve Ⅰ. Vertigo All subjective and objective illusion of ...
... Section 4 vertigo and deafness Ⅷ cranial nerve: vestibular nerve cochlear nerve Ⅰ. Vertigo All subjective and objective illusion of ...
The EYE - Bishop Amat Memorial High School
... » ciliary muscles and suspensory ligaments » Ciliary processes (^ capillaries) – Functions: » Surround/control shape of lens » Secrete fluid found in anterior chamber of eyeball ...
... » ciliary muscles and suspensory ligaments » Ciliary processes (^ capillaries) – Functions: » Surround/control shape of lens » Secrete fluid found in anterior chamber of eyeball ...
The Physiology of Vision
... lens flattened for distant vision The elastic lens is attached to the circular cilary muscles by the zonalus which is made of inelastic fibres When the cilary muscles contract, it releases the tension on the zonalus and the elastic lens returns to a more rounded shape suitable for near vision ...
... lens flattened for distant vision The elastic lens is attached to the circular cilary muscles by the zonalus which is made of inelastic fibres When the cilary muscles contract, it releases the tension on the zonalus and the elastic lens returns to a more rounded shape suitable for near vision ...