The effect of interruption of the short posterior ciliary arteries
... posterior ciliary arterial supply.4- 5 Under these conditions, the quantity of slow axoplasmic transport into the optic nerve is also reduced.0 The purpose of this study is to characterize the effects on slow axoplasmic transport of sugical interruption of the arterial blood supply to the nerve head ...
... posterior ciliary arterial supply.4- 5 Under these conditions, the quantity of slow axoplasmic transport into the optic nerve is also reduced.0 The purpose of this study is to characterize the effects on slow axoplasmic transport of sugical interruption of the arterial blood supply to the nerve head ...
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. ...
Macular pigments: their characteristics and putative role
... separating the individual concentrations of L and Z. As L and Z are found in different distributions in the retina, Sommerburg et al. (1998) used HPLC to analyse the contents of different fruits and vegetables for each MP constituent. Their findings are presented in Table 1, reproduced from the origi ...
... separating the individual concentrations of L and Z. As L and Z are found in different distributions in the retina, Sommerburg et al. (1998) used HPLC to analyse the contents of different fruits and vegetables for each MP constituent. Their findings are presented in Table 1, reproduced from the origi ...
Prevalence and Causes of Blindness and Low
... contemporary survey data on the prevalence of blindness in southern Sudan, and is consistent with the initial reports that blindness is a severe public health problem in Mankien payam. The study provides data for priority setting and planning for prevention of blindness activities in Mankien. The pr ...
... contemporary survey data on the prevalence of blindness in southern Sudan, and is consistent with the initial reports that blindness is a severe public health problem in Mankien payam. The study provides data for priority setting and planning for prevention of blindness activities in Mankien. The pr ...
April 2014
... the choroid). They are visible as yellow retinal deposits during fundus examination. There are various types of drusen. At least one small hard drusen is observed in the majority of individuals in their fifties whereas larger soft drusen (> 125µm) with indistinct edges have a stronger association wi ...
... the choroid). They are visible as yellow retinal deposits during fundus examination. There are various types of drusen. At least one small hard drusen is observed in the majority of individuals in their fifties whereas larger soft drusen (> 125µm) with indistinct edges have a stronger association wi ...
Anaerobic bacterial endophthalmitis in the rabbit.
... bacteria. Two of these cases were infected solely with anaerobic organisms: Lactobacillus fermentus and P. acnes. In 1978, Forster6 isolated P. acnes in 2 eyes following intraocular lens insertion. Both eyes exhibited a smoldering clinical inflammation with late onset, emphasizing the fact that orga ...
... bacteria. Two of these cases were infected solely with anaerobic organisms: Lactobacillus fermentus and P. acnes. In 1978, Forster6 isolated P. acnes in 2 eyes following intraocular lens insertion. Both eyes exhibited a smoldering clinical inflammation with late onset, emphasizing the fact that orga ...
From the optic tectum to the primary visual cortex
... or gaze exogenously. Exogenous guidance is reflexive or bottom-up, driven by external rather than internal factors (such as the goal of an on-going task), which are endogenous or top-down. For example, the location of an orientation singleton, such as a vertical bar in a background of horizontal bar ...
... or gaze exogenously. Exogenous guidance is reflexive or bottom-up, driven by external rather than internal factors (such as the goal of an on-going task), which are endogenous or top-down. For example, the location of an orientation singleton, such as a vertical bar in a background of horizontal bar ...
Article - Perelman School of Medicine
... Questionnaires were self-administered. Research assistants reviewed the instructions with each participant and answered any questions that arose. On completion of each questionnaire, the research assistant immediately reviewed the forms to ensure that all items were answered and that responses were ...
... Questionnaires were self-administered. Research assistants reviewed the instructions with each participant and answered any questions that arose. On completion of each questionnaire, the research assistant immediately reviewed the forms to ensure that all items were answered and that responses were ...
Decreased retinal ganglion cell number and misdirected axon
... occurs with a frequency of 1:50,000 and like Bst, OPA1 shows a dominant pattern of inheritance. There are variable and often asymmetric effects on visual acuity and the ganglion cell population1617, and as with most Bst/+ cases, eyes of humans with OPA1 are of normal size and appearance.18'19 Althou ...
... occurs with a frequency of 1:50,000 and like Bst, OPA1 shows a dominant pattern of inheritance. There are variable and often asymmetric effects on visual acuity and the ganglion cell population1617, and as with most Bst/+ cases, eyes of humans with OPA1 are of normal size and appearance.18'19 Althou ...
Hyperbaric Oxygen Therapy Ameliorates the Blood
... interendothelial cell tight junctions 5, endothelial cell transcytosis 6, and vacuolation of the retinal pigment epithelium7. Based on the conclusions from Diabetic Retinopathy Study which is a multicenter clinical trial focusing on the effects and efficacy of photocoagulation on diabetic retinopath ...
... interendothelial cell tight junctions 5, endothelial cell transcytosis 6, and vacuolation of the retinal pigment epithelium7. Based on the conclusions from Diabetic Retinopathy Study which is a multicenter clinical trial focusing on the effects and efficacy of photocoagulation on diabetic retinopath ...
History of falling and visual ability among independently living
... Purpose: The aim of this study was to assess the performance-based visual ability among independently living elderly subjects and to investigate whether there was any association between visual ability and falls. Subjects and methods: A total of 298 randomly selected subjects aged 70–85 years were i ...
... Purpose: The aim of this study was to assess the performance-based visual ability among independently living elderly subjects and to investigate whether there was any association between visual ability and falls. Subjects and methods: A total of 298 randomly selected subjects aged 70–85 years were i ...
Quantification of retinal layer thickness changes in acute macular
... automated segmentation alignment was incorrect, the layer boundaries were manually corrected by one of the coauthors (MB) and again verified by the other two graders (MSZ, MRM). For further layer thickness analyses the inbuilt ETDRS grid of the Heidelberg software was initially moved over the most hy ...
... automated segmentation alignment was incorrect, the layer boundaries were manually corrected by one of the coauthors (MB) and again verified by the other two graders (MSZ, MRM). For further layer thickness analyses the inbuilt ETDRS grid of the Heidelberg software was initially moved over the most hy ...
The extra-retinal motion aftereffect - School of Psychology
... Adaptation stimuli consisted of a vertically moving, striped stimulus depicting two strips of horizontal lines measuring 20º by 72º and separated by 10º. A line consisted of a horizontal row of dots at 2º intervals, with each line separated vertically by 4º. In eye-movement conditions, the stimulus ...
... Adaptation stimuli consisted of a vertically moving, striped stimulus depicting two strips of horizontal lines measuring 20º by 72º and separated by 10º. A line consisted of a horizontal row of dots at 2º intervals, with each line separated vertically by 4º. In eye-movement conditions, the stimulus ...
What`s New and Important in Pediatric Ophthalmology
... Results: The values associated with 75% underdiagnosis of true plus disease (i.e., 25% sensitivity cutoff) were AIC 0.061 and VD 4.272, the values associated with 50% underdiagnosis of true plus disease (i.e., a 50% sensitivity cutoff) were AIC 0.049 and VD 4.088, and the values associated with 25% ...
... Results: The values associated with 75% underdiagnosis of true plus disease (i.e., 25% sensitivity cutoff) were AIC 0.061 and VD 4.272, the values associated with 50% underdiagnosis of true plus disease (i.e., a 50% sensitivity cutoff) were AIC 0.049 and VD 4.088, and the values associated with 25% ...
THE DIAGNOSTIC VALUE OF BIOMICROSCOPY OF THE
... detachment has already occurred, the degenerate regions of the retina to which vitreous adheres may be coagulated. Besides the tears here described, which originate in connexion with vitreous detachment, there exist-less frequently-retinal holes which are unrelated to vitreous adhesions. These are d ...
... detachment has already occurred, the degenerate regions of the retina to which vitreous adheres may be coagulated. Besides the tears here described, which originate in connexion with vitreous detachment, there exist-less frequently-retinal holes which are unrelated to vitreous adhesions. These are d ...
Objective optical assessment of tear-film quality dynamics in normal
... METHODS: Dynamic recording of double-pass retinal images during unforced tear-film breakup was performed in eyes with mild dry-eye symptoms (study group) and in an asymptomatic control group. Series of consecutive retinal images were recorded every 0.5 seconds while the patient avoided blinking. Mea ...
... METHODS: Dynamic recording of double-pass retinal images during unforced tear-film breakup was performed in eyes with mild dry-eye symptoms (study group) and in an asymptomatic control group. Series of consecutive retinal images were recorded every 0.5 seconds while the patient avoided blinking. Mea ...
Quantification of retinal layer thickness changes in acute macular
... may be followed by a consecutive thinning over time. This study demonstrates that within the NIR image identified AMN lesions, the hyper-reflectivity of the OPL is not associated with significant swelling. However, in most eyes the area of maximal OPL thickening was found to be adjacent to hyporeflectiv ...
... may be followed by a consecutive thinning over time. This study demonstrates that within the NIR image identified AMN lesions, the hyper-reflectivity of the OPL is not associated with significant swelling. However, in most eyes the area of maximal OPL thickening was found to be adjacent to hyporeflectiv ...
Approach to Intermediate Uveitis
... which may or may not be associated with infection or systemic disease. A subset of this, which is not associated with any systemic disease is termed as “pars planitis”.1 It comprises of approximately 9.5-17.4% of all uveitis.2,3 The prevalence of active intermediate uveitis in a South Indiabased stu ...
... which may or may not be associated with infection or systemic disease. A subset of this, which is not associated with any systemic disease is termed as “pars planitis”.1 It comprises of approximately 9.5-17.4% of all uveitis.2,3 The prevalence of active intermediate uveitis in a South Indiabased stu ...
Ten days of darkness causes temporary blindness during an early
... Thresholds (the visual acuity) were defined as the highest spatial frequency for which performance was at 70% correct or better. The thresholds could be titrated quite precisely, because performance dropped from flawless to chance within a couple of onetwelfth octave steps. With the exception of ani ...
... Thresholds (the visual acuity) were defined as the highest spatial frequency for which performance was at 70% correct or better. The thresholds could be titrated quite precisely, because performance dropped from flawless to chance within a couple of onetwelfth octave steps. With the exception of ani ...
Guidelines for Ophthalmology - The Clinical Establishments
... and sit closer to the black board or the television. The frustrated child becomes an introvert, keeping away from other children of his age and avoids outdoor activities. The myope’s main complaint is that he /she don’t see distant objects clearly. The defect may also manifest as headache, watering ...
... and sit closer to the black board or the television. The frustrated child becomes an introvert, keeping away from other children of his age and avoids outdoor activities. The myope’s main complaint is that he /she don’t see distant objects clearly. The defect may also manifest as headache, watering ...
Varied manifestations of persistent hyperplastic primary vitreous with
... and Arf −/− cells was calculated based on a) the PCR results of genomic DNA, b) fluorescence microscopy detection of Gfp in the corneal epithelium, and c) light microscopy detection of pigmented cells in the retinal pigment epithelium (RPE); degree of chimerism was expressed as a percentage of the t ...
... and Arf −/− cells was calculated based on a) the PCR results of genomic DNA, b) fluorescence microscopy detection of Gfp in the corneal epithelium, and c) light microscopy detection of pigmented cells in the retinal pigment epithelium (RPE); degree of chimerism was expressed as a percentage of the t ...
Speed judgments of three-dimensional motion incorporate
... exploited when judging the sign of 3D motion. Here, we ask whether extraretinal signals also affect judgments of 3D speed. Observers judged the speed of a small target surrounded by a large background. To manipulate extraretinal information, we varied the vergence demand of the entire stimulus sinus ...
... exploited when judging the sign of 3D motion. Here, we ask whether extraretinal signals also affect judgments of 3D speed. Observers judged the speed of a small target surrounded by a large background. To manipulate extraretinal information, we varied the vergence demand of the entire stimulus sinus ...
full text pdf
... In the present study, we reported a consanguineous family with two affected daughters of isolated clinical anophthalmia from the Kohat region of Khyber Pakhtunkhwa, Pakistan. Affected daughters do not have any congenital malformations except for bilateral clinical anophthalmia. In addition, the fami ...
... In the present study, we reported a consanguineous family with two affected daughters of isolated clinical anophthalmia from the Kohat region of Khyber Pakhtunkhwa, Pakistan. Affected daughters do not have any congenital malformations except for bilateral clinical anophthalmia. In addition, the fami ...
news from the Massachusetts Eye and Ear Infirmary
... macular degeneration and diabetic retinopathy. ...
... macular degeneration and diabetic retinopathy. ...
Retinal-Vein Occlusion
... with one study showing that half have a return to 20/40 vision or better within 6 months, without treatment.23 Nevertheless, many patients continue to have poor vision in the affected eye. Among participants enrolled in the Branch Vein Occlusion Study, a randomized trial of the effects of laser trea ...
... with one study showing that half have a return to 20/40 vision or better within 6 months, without treatment.23 Nevertheless, many patients continue to have poor vision in the affected eye. Among participants enrolled in the Branch Vein Occlusion Study, a randomized trial of the effects of laser trea ...
Retinitis pigmentosa
Retinitis pigmentosa (RP) is an inherited, degenerative eye disease that causes severe vision impairment due to the progressive degeneration of the rod photoreceptor cells in the retina. This form of retinal dystrophy manifests initial symptoms independent of age; thus, RP diagnosis occurs anywhere from early infancy to late adulthood. Patients in the early stages of RP first notice compromised peripheral and dim light vision due to the decline of the rod photoreceptors. The progressive rod degeneration is later followed by abnormalities in the adjacent retinal pigment epithelium (RPE) and the deterioration of cone photoreceptor cells. As peripheral vision becomes increasingly compromised, patients experience progressive ""tunnel vision"" and eventual blindness. Affected individuals may additionally experience defective light-dark adaptations, nyctalopia (night blindness), and the accumulation of bone spicules in the fundus (eye).