Flow of aqueous humor in humans [The Friedenwald Lecture]
... number of investigators who devised several new experimental approaches. The use of systemic tracers that are cleared rapidly by the kidney was advocated. Flow could be deduced by the rate of disappearance from the eye after renal clearance of the plasma.19'44 Others later devised a detailed multico ...
... number of investigators who devised several new experimental approaches. The use of systemic tracers that are cleared rapidly by the kidney was advocated. Flow could be deduced by the rate of disappearance from the eye after renal clearance of the plasma.19'44 Others later devised a detailed multico ...
Five year risk of progression of primary angle closure suspects to
... PACG is commoner than thought; 0.7% of the population over the age of 30 years had PACG; 1.4% over the age of 30 years (2.2% >40 years) had occludable angles at risk for angle closure.3 A smaller population based study the Vellore eye study (VES) also from south India found that PACG (4.3%) was comm ...
... PACG is commoner than thought; 0.7% of the population over the age of 30 years had PACG; 1.4% over the age of 30 years (2.2% >40 years) had occludable angles at risk for angle closure.3 A smaller population based study the Vellore eye study (VES) also from south India found that PACG (4.3%) was comm ...
Coding, Billing, and Documentation for Glaucoma Patients Nov 8 2014
... components, hx, exam, and MDM must be at the highest level. Missing 10 ROS on a comprehensive encounter (99204) is fatal. • For an existing patient, either hx, or the exam, may be at a lower level, and the level is determined by MDM and the other key component. This is the 2 of 3 rule. • Remember th ...
... components, hx, exam, and MDM must be at the highest level. Missing 10 ROS on a comprehensive encounter (99204) is fatal. • For an existing patient, either hx, or the exam, may be at a lower level, and the level is determined by MDM and the other key component. This is the 2 of 3 rule. • Remember th ...
Tests and models for screening to prevent blindness
... Generally screening for amblyopia is recommended prior to 7-8 years of age as there is a concern that the efficacy of treatment initiated beyond this age range may be diminished (1). Indeed, current paediatric and ophthalmological guidelines support screening at 3 to 5 years of age (2). Search 2: id ...
... Generally screening for amblyopia is recommended prior to 7-8 years of age as there is a concern that the efficacy of treatment initiated beyond this age range may be diminished (1). Indeed, current paediatric and ophthalmological guidelines support screening at 3 to 5 years of age (2). Search 2: id ...
Corneal Transplant, Endothelial Keratoplasty
... endothelial keratoplasty (FELEK). These techniques include some donor stroma along with the endothelium and Descemet’s membrane, which results in a thickened stromal layer after transplantation. If the donor tissue comprises Descemet’s membrane and endothelium alone, the technique is known as Descem ...
... endothelial keratoplasty (FELEK). These techniques include some donor stroma along with the endothelium and Descemet’s membrane, which results in a thickened stromal layer after transplantation. If the donor tissue comprises Descemet’s membrane and endothelium alone, the technique is known as Descem ...
2.4 - PRIMARY ANGLE-CLOSURE
... and specific diagnostic criteria. Only in recent years has there been recognition of the need to standardize definitions of the various types. Angle-closure is defined by the presence of iridotrabecular contact (ITC). This can be either appositional or synechial. Either can be due to any one of a numbe ...
... and specific diagnostic criteria. Only in recent years has there been recognition of the need to standardize definitions of the various types. Angle-closure is defined by the presence of iridotrabecular contact (ITC). This can be either appositional or synechial. Either can be due to any one of a numbe ...
Retinally-induced aniseikonia
... optically induced aniseikonia is either not or little field dependent5, in accordance with the general perception of aniseikonia. It shows that for all three patients the aniseikonia has a clear field dependency. The absolute values of the aniseikonia are relatively high, considering that patients m ...
... optically induced aniseikonia is either not or little field dependent5, in accordance with the general perception of aniseikonia. It shows that for all three patients the aniseikonia has a clear field dependency. The absolute values of the aniseikonia are relatively high, considering that patients m ...
CURRICULUM VITAE - Boston Retinal Implant Project
... and treatment of optic neuritis and ischemic optic neuropathy, which are the two most common forms of non-glaucomatous optic neuropathy in adults. Some of my significant findings include: 1) recognition that all women and most men who experience optic neuritis eventually developed multiple sclerosis ...
... and treatment of optic neuritis and ischemic optic neuropathy, which are the two most common forms of non-glaucomatous optic neuropathy in adults. Some of my significant findings include: 1) recognition that all women and most men who experience optic neuritis eventually developed multiple sclerosis ...
Understanding Nystagmus: Diagnosis, Related Disorders
... muscle/eye junction (“enthesis”) – Suggests a possible role for abnormal proprioception (sensation of position) as cause of disease ...
... muscle/eye junction (“enthesis”) – Suggests a possible role for abnormal proprioception (sensation of position) as cause of disease ...
Multifocal intraocular lenses: Relative indications and
... around point sources of light. Although these optical aberrations will improve over many months through a process of neuroadaptation, the possibility of permanent halos that may affect the quality of night vision should be presented to surgical candidates.11–13 If patients are not willing to accept ...
... around point sources of light. Although these optical aberrations will improve over many months through a process of neuroadaptation, the possibility of permanent halos that may affect the quality of night vision should be presented to surgical candidates.11–13 If patients are not willing to accept ...
Age-related macular degeneration
... Age-related macular degeneration is a progressive disease which can lead to diminished visual acuity and loss of central vision (Figure 1). It is one of the principal causes of blindness. In advanced disease people retain their peripheral vision but are legally blind due to a loss of central vision. ...
... Age-related macular degeneration is a progressive disease which can lead to diminished visual acuity and loss of central vision (Figure 1). It is one of the principal causes of blindness. In advanced disease people retain their peripheral vision but are legally blind due to a loss of central vision. ...
The relationship between pore density and outflow facility in
... For whole eye calculations, the IW endothelial surface was taken to be 11 mm2. For quadrant analysis, it was a quarter of this area.14 In addition to IW facility, we also calculated the hydraulic conductivity of the IW endothelium, defined as IW facility per unit area (units: fi\/ (min • mmHg • cm2) ...
... For whole eye calculations, the IW endothelial surface was taken to be 11 mm2. For quadrant analysis, it was a quarter of this area.14 In addition to IW facility, we also calculated the hydraulic conductivity of the IW endothelium, defined as IW facility per unit area (units: fi\/ (min • mmHg • cm2) ...
Complete Thesis - Visual Optics and Biophotonics Lab
... objects at near distance. While accommodative lenses are the ideal solutions for presbyopia, current optical solutions rely on providing an acceptable quality of vision at near and far distances. Optimization of the optical solutions rely on better understanding of how the visual system copes with t ...
... objects at near distance. While accommodative lenses are the ideal solutions for presbyopia, current optical solutions rely on providing an acceptable quality of vision at near and far distances. Optimization of the optical solutions rely on better understanding of how the visual system copes with t ...
opthalmoplegic migraine - Bombay Ophthalmologists` Association
... pattern – the most important aspect of this syndrome. If the pattern is not followed then there is probably some cause other than migraine for the clinical symptomatology. Pain , not oculomotor paresis , is the initial symptom ,but because of the young patients in which it frequently occurs; the pai ...
... pattern – the most important aspect of this syndrome. If the pattern is not followed then there is probably some cause other than migraine for the clinical symptomatology. Pain , not oculomotor paresis , is the initial symptom ,but because of the young patients in which it frequently occurs; the pai ...
vision - University of Illinois College of Medicine at Chicago
... September to support the “UIC K12 Independent Clinical Scientist Development Program” and that three MD, PhD clinician scientists have joined this program! We are one of six Ophthalmology Departments in the nation to be actively supported by the K12 award. As a result of these efforts, the number of ...
... September to support the “UIC K12 Independent Clinical Scientist Development Program” and that three MD, PhD clinician scientists have joined this program! We are one of six Ophthalmology Departments in the nation to be actively supported by the K12 award. As a result of these efforts, the number of ...
Perkins instructions for use - Haag
... The Perkins Mk3 Tonometer is an essential tool used in the global examination of all eye check-ups and specifically for a glaucoma examination, these tests together give a complete picture of the patient’s ocular health and are therefore important in understanding the risks of developing and/or cont ...
... The Perkins Mk3 Tonometer is an essential tool used in the global examination of all eye check-ups and specifically for a glaucoma examination, these tests together give a complete picture of the patient’s ocular health and are therefore important in understanding the risks of developing and/or cont ...
Contour Integration Deficits in Anisometropic Amblyopia
... had a history of occlusion therapy, and three of six had a history of long-term spectacle wear. We have found7 that contour detection thresholds are substantially modifiable by occlusion therapy. It is not known whether spectacle correction alone is sufficient to modify the contour detection thresho ...
... had a history of occlusion therapy, and three of six had a history of long-term spectacle wear. We have found7 that contour detection thresholds are substantially modifiable by occlusion therapy. It is not known whether spectacle correction alone is sufficient to modify the contour detection thresho ...
Management of Nystagmus – the
... • To stabilize visual image on the retina – High plus spectacle with high minus contact lens[ -58 & +32 ] – Entire 30 deg field focussed to centre of eye, and CL refocuses to the retina. – Image remains stable irrespective of eye movement !! ...
... • To stabilize visual image on the retina – High plus spectacle with high minus contact lens[ -58 & +32 ] – Entire 30 deg field focussed to centre of eye, and CL refocuses to the retina. – Image remains stable irrespective of eye movement !! ...
NYSTAGMUS - Schor Lab Home Page
... Prolonged attempts to deviate gaze will often show a reduction in nystagmus amplitude. When the patient then returns gaze to primary position, there may be a Rebound Nystagmus with fast phase in the opposite direction. Vestibular Nystagmus: When an imbalance exists in the vestibular system, the eyes ...
... Prolonged attempts to deviate gaze will often show a reduction in nystagmus amplitude. When the patient then returns gaze to primary position, there may be a Rebound Nystagmus with fast phase in the opposite direction. Vestibular Nystagmus: When an imbalance exists in the vestibular system, the eyes ...
Diplopia, Third Nerve Palsies, and Sixth Nerve Palsies
... (not a neurologic emergency, see “Diagnosis” section below) was among the most common identified etiologies in most of the series (Table 6.2), representing 17–35% of cases [3–6]. However, aneurysmal and neoplastic causes were nearly equally as common, representing up to 18–19% of cases, and a large p ...
... (not a neurologic emergency, see “Diagnosis” section below) was among the most common identified etiologies in most of the series (Table 6.2), representing 17–35% of cases [3–6]. However, aneurysmal and neoplastic causes were nearly equally as common, representing up to 18–19% of cases, and a large p ...
Refractive error blindness - World Health Organization
... age than cataract, which manifests itself in old age (7). If the impact of blindness due to refractive error is considered in terms of blind-person-years, a person becoming blind due to refractive error at a young age, and which is not corrected, would suffer many more years of blindness than a pers ...
... age than cataract, which manifests itself in old age (7). If the impact of blindness due to refractive error is considered in terms of blind-person-years, a person becoming blind due to refractive error at a young age, and which is not corrected, would suffer many more years of blindness than a pers ...
2 m – 27. Veins of the head and neck
... with wing venous plexus; - (plexus venosus caroticus internus) surrounds a rocky part of the internal carotid artery in the sleepy channel temporal bone, it combines cavernous sinus dura mater with wing venous plexus. The veins of the dura mater of the brain The veins of the brain dura mater (vv. Me ...
... with wing venous plexus; - (plexus venosus caroticus internus) surrounds a rocky part of the internal carotid artery in the sleepy channel temporal bone, it combines cavernous sinus dura mater with wing venous plexus. The veins of the dura mater of the brain The veins of the brain dura mater (vv. Me ...
An Incremental Retinal-Defocus Theory of the Development of Myopia
... technological improvements over the past 20 years, there are still surgical and postsurgical risks, along with possible side effects such as long-term hazy vision and dry eye (Javitt and Chiang 1994). Furthermore, surgery does not prevent the subsequent development of adult-onset myopia or other age ...
... technological improvements over the past 20 years, there are still surgical and postsurgical risks, along with possible side effects such as long-term hazy vision and dry eye (Javitt and Chiang 1994). Furthermore, surgery does not prevent the subsequent development of adult-onset myopia or other age ...
Diabetic Retinopathy: A Position Statement by the
... with lowering of systolic blood pressure from a mean of 154 mmHg to 144 mmHg (20). However, the more recent ACCORD Eye Study did not show either a harmful or a beneficial effect when comparing systolic pressure of 120 mmHg vs. 140 mmHg in a similar cohort of patients (9). Several observational studie ...
... with lowering of systolic blood pressure from a mean of 154 mmHg to 144 mmHg (20). However, the more recent ACCORD Eye Study did not show either a harmful or a beneficial effect when comparing systolic pressure of 120 mmHg vs. 140 mmHg in a similar cohort of patients (9). Several observational studie ...
Wavefront-Guided LASIK for the Correction of Primary Myopia and
... Objective: To describe wavefront-guided (WFG) LASIK for the primary treatment of low to moderate levels of myopia and astigmatism and to examine the evidence on the safety and effectiveness of the procedure in comparison with conventional LASIK. Methods: Literature searches conducted in 2004, 2005, ...
... Objective: To describe wavefront-guided (WFG) LASIK for the primary treatment of low to moderate levels of myopia and astigmatism and to examine the evidence on the safety and effectiveness of the procedure in comparison with conventional LASIK. Methods: Literature searches conducted in 2004, 2005, ...
Visual impairment due to intracranial pressure
Spaceflight induced visual impairment is hypothesized to be a result of increased intracranial pressure. The study of visual changes and intracranial pressure (ICP) in astronauts on long-duration flights is a relatively recent topic of interest to Space Medicine professionals. Although reported signs and symptoms have not appeared to be severe enough to cause blindness in the near term, long term consequences of chronically elevated intracranial pressure is unknown.NASA has reported that fifteen long-duration male astronauts (45–55 years of age) have experienced confirmed visual and anatomical changes during or after long-duration flights. Optic disc edema, globe flattening, choroidal folds, hyperopic shifts and an increased intracranial pressure have been documented in these astronauts. Some individuals experienced transient changes post-flight while others have reported persistent changes with varying degrees of severity.Although the exact cause is not known at this time, it is suspected that microgravity-induced cephalad fluid shift and comparable physiological changes play a significant role in these changes. Other contributing factors may include pockets of increased CO2 and an increase in sodium intake. It seems unlikely that resistive or aerobic exercise are contributing factors, but they may be potential countermeasures to reduce intraocular pressure (IOP) or intracranial pressure (ICP) in-flight.