Dictionary of Optometry and Visual Science v. Michel Millodot
... A condition characterized by reduced visual acuity due to a lesion in the eye or in the visual pathway, which hinders the normal development of vision, and which is not correctable by spectacles or contact lenses. The usual clinical criterion is 6/9 (or 20/30) or less in one eye, or a two-line diffe ...
... A condition characterized by reduced visual acuity due to a lesion in the eye or in the visual pathway, which hinders the normal development of vision, and which is not correctable by spectacles or contact lenses. The usual clinical criterion is 6/9 (or 20/30) or less in one eye, or a two-line diffe ...
Ischemic Optic Neuropathy After Spine Surgery
... hemorrhage, oxygen delivery to the optic nerve may be decreased, leading to either anterior or posterior ION. How low the hemoglobin level must be or the length of time the hemoglobin level is required to decrease to result in this complication has not been reported.4 Patients who experience substan ...
... hemorrhage, oxygen delivery to the optic nerve may be decreased, leading to either anterior or posterior ION. How low the hemoglobin level must be or the length of time the hemoglobin level is required to decrease to result in this complication has not been reported.4 Patients who experience substan ...
Ophthalmology and Eye Disease - Faculty of Medical and Health
... for visual processing as well as their ability to process signals across visual space and over time; namely their spatial and temporal summation. Rods are more suited to processing the signals within visual images seen at low light levels (twilight, scotopic conditions) while cones process visual im ...
... for visual processing as well as their ability to process signals across visual space and over time; namely their spatial and temporal summation. Rods are more suited to processing the signals within visual images seen at low light levels (twilight, scotopic conditions) while cones process visual im ...
Pediatric Eye Examination
... poor (20/100 to 20/200) and the patient will still show essentially normal monocular fixation. Binocular fixation preference testing, however, will identify even mild amblyopia (two lines of Snellen acuity difference).44,47 It is important to assess monocular fixation before fixation preference testing ...
... poor (20/100 to 20/200) and the patient will still show essentially normal monocular fixation. Binocular fixation preference testing, however, will identify even mild amblyopia (two lines of Snellen acuity difference).44,47 It is important to assess monocular fixation before fixation preference testing ...
Visual Information Processing Evaluation and Orthoptic and Vision
... CLINICAL EVIDENCE Vision Therapy for Amblyopia Amblyopia, sometimes called lazy eye, is characterized by poor vision in an eye that did not develop normal sight during childhood so that 1 eye develops good vision while the other does not. This condition affects approximately 2% to 3% of the populati ...
... CLINICAL EVIDENCE Vision Therapy for Amblyopia Amblyopia, sometimes called lazy eye, is characterized by poor vision in an eye that did not develop normal sight during childhood so that 1 eye develops good vision while the other does not. This condition affects approximately 2% to 3% of the populati ...
Ponce (2008) Stereopsis
... distinct from other non-reproductive female ‘workers’, even her bone structure changes. Mole-rats were thought to be the only mammal to do this, but it has since been discovered that female meerkats also develop elongated vertebra when they become dominant breeders. As well as reproductives, there a ...
... distinct from other non-reproductive female ‘workers’, even her bone structure changes. Mole-rats were thought to be the only mammal to do this, but it has since been discovered that female meerkats also develop elongated vertebra when they become dominant breeders. As well as reproductives, there a ...
4314 - B775 4315 - B776 4316 - B777 4317 - B778 4318
... patients. The Welch Allyn SureSight is perhaps the most flexible and user/patient friendly of these devices as it is targeted for very young pediatric patients and is calibrated for use without cycloplegia. To date, there has been little evaluation of the effectiveness of this device, in particular, ...
... patients. The Welch Allyn SureSight is perhaps the most flexible and user/patient friendly of these devices as it is targeted for very young pediatric patients and is calibrated for use without cycloplegia. To date, there has been little evaluation of the effectiveness of this device, in particular, ...
Visual acuity and correctable visual impairment among Norwegian
... Four out of the six participants who had correctable visual impairment (HVA Snellen < 0.5 which improved to BCVA ≥ 0.50) reported that it was more than 5 years since last vision examination. Table 3 shows the distribution of correctable visual impairment with regard to gender, time since last vision ...
... Four out of the six participants who had correctable visual impairment (HVA Snellen < 0.5 which improved to BCVA ≥ 0.50) reported that it was more than 5 years since last vision examination. Table 3 shows the distribution of correctable visual impairment with regard to gender, time since last vision ...
Changes in retinal aquaporin-9 (AQP9) expression in glaucoma
... Glaucoma is a group of slow progressive vision disorders affecting the trabecular meshwork, the ONH (optic nerve head) and RGCs (retinal ganglion cells) [1]. Glaucoma is classified as primary if evidenced by optic neuropathy and as secondary if evidenced by elevated IOP (intraocular pressure) caused ...
... Glaucoma is a group of slow progressive vision disorders affecting the trabecular meshwork, the ONH (optic nerve head) and RGCs (retinal ganglion cells) [1]. Glaucoma is classified as primary if evidenced by optic neuropathy and as secondary if evidenced by elevated IOP (intraocular pressure) caused ...
neurofibromatosis 1 in twins
... visual acuity VAT= cc =0,5 and esophorim alternans. For the girl: better visual acuity VOT= cc 0,91,0 without strabismus. The children are still under regular control at Orthoptics and Pleoptics Department of our Clinic. DISCUSSION Neurofibromatosis-1 is the most common phakomatosis affecting approx ...
... visual acuity VAT= cc =0,5 and esophorim alternans. For the girl: better visual acuity VOT= cc 0,91,0 without strabismus. The children are still under regular control at Orthoptics and Pleoptics Department of our Clinic. DISCUSSION Neurofibromatosis-1 is the most common phakomatosis affecting approx ...
Session 239 Embryology and morphogenesis of ocular
... Purpose: Accessory ocular tissues including the lacrimal apparatus, extraocular muscles, eyelids, eyelashes and conjunctiva are collectively called ocular adnexa. Malformation of such structures would lead to congenital vision dysfunction or loss. The main purpose of this study is to characterize th ...
... Purpose: Accessory ocular tissues including the lacrimal apparatus, extraocular muscles, eyelids, eyelashes and conjunctiva are collectively called ocular adnexa. Malformation of such structures would lead to congenital vision dysfunction or loss. The main purpose of this study is to characterize th ...
Novel ophthalmic imaging
... Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, School of Medicine, University of Pittsburgh, Pittsburgh, PA; 3Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA; 4Center for Neurosci ...
... Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, School of Medicine, University of Pittsburgh, Pittsburgh, PA; 3Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA; 4Center for Neurosci ...
AMBLYOPIA
... Amblyopia is an important socioeconomic problem. Studies have shown that it is the number one cause of monocular vision loss in adults. Persons with amblyopia have a higher risk of becoming blind because of potential loss to the sound eye from other causes. Race/Sex No racial /gender preference is ...
... Amblyopia is an important socioeconomic problem. Studies have shown that it is the number one cause of monocular vision loss in adults. Persons with amblyopia have a higher risk of becoming blind because of potential loss to the sound eye from other causes. Race/Sex No racial /gender preference is ...
leading causes of blindness worldwide
... plays a role, the high frequency of developmental anomalies and the fact that many of the conditions associated with blindness in children are also causes of child mortality (9). Each year, an estimated half a million children go blind, mostly in the poorest countries of Asia and Africa, of whom up ...
... plays a role, the high frequency of developmental anomalies and the fact that many of the conditions associated with blindness in children are also causes of child mortality (9). Each year, an estimated half a million children go blind, mostly in the poorest countries of Asia and Africa, of whom up ...
The eye of the crepuscular rodent rock cavy
... stored for other studies carried out in the laboratory. Three skulls were skinned and macerated for a study of the bony orbit. The position of the optic nerve in the posterior pole was examined, and, after removal of fat tissue and extraocular muscles, with aid of a digital calliper, the following m ...
... stored for other studies carried out in the laboratory. Three skulls were skinned and macerated for a study of the bony orbit. The position of the optic nerve in the posterior pole was examined, and, after removal of fat tissue and extraocular muscles, with aid of a digital calliper, the following m ...
Brain damage-related Vision Loss - Functional Classification (Word)
... Visual Vestibular, Motion sickness Left eye Right eye, Diplopia Left hemisphere - Right hemisphere, Edge not detectable except in hemianopia Ventral stream (what?) - Dorsal stream (where?), Deficits only in brain damage (CVI, TBI, CVA) Presenter’s Notes The previous slide depicted the many brain are ...
... Visual Vestibular, Motion sickness Left eye Right eye, Diplopia Left hemisphere - Right hemisphere, Edge not detectable except in hemianopia Ventral stream (what?) - Dorsal stream (where?), Deficits only in brain damage (CVI, TBI, CVA) Presenter’s Notes The previous slide depicted the many brain are ...
evolution of the eye
... thus, of necessity, a biochemical pathway was needed to reset the molecule in readiness to signal light again. Once these two elements were in place, I hypothesized, the ciliary photoreceptors would have had a distinct advantage over rhabdomeric photoreceptors in environments such as the deep ocean, ...
... thus, of necessity, a biochemical pathway was needed to reset the molecule in readiness to signal light again. Once these two elements were in place, I hypothesized, the ciliary photoreceptors would have had a distinct advantage over rhabdomeric photoreceptors in environments such as the deep ocean, ...
Age-Related Macular Degeneration
... include the reduced ETDRS and Lighthouse (single letter) charts as well as reading charts such as the Minnesota Reading Test (MNRead Card) or Colenbrander.45 During VA measurement, it is important to verify the presence of binocular summation (improvement) or inhibition (deterioration), especially w ...
... include the reduced ETDRS and Lighthouse (single letter) charts as well as reading charts such as the Minnesota Reading Test (MNRead Card) or Colenbrander.45 During VA measurement, it is important to verify the presence of binocular summation (improvement) or inhibition (deterioration), especially w ...
Visual fields and eye morphology support color vision in a color
... areas, a central dark pigmented pocket-shaped area surrounded by a peripheral brown pigmented area (Fig. 2E, D). The bodies of the photoreceptor cells are located in the peripheral region of the retina (Figs. 2C, E, 3C, D). The cells are bipolar, with a short receptive segment bearing the rhabdomere ...
... areas, a central dark pigmented pocket-shaped area surrounded by a peripheral brown pigmented area (Fig. 2E, D). The bodies of the photoreceptor cells are located in the peripheral region of the retina (Figs. 2C, E, 3C, D). The cells are bipolar, with a short receptive segment bearing the rhabdomere ...
NUTRITIONAL THERAPIES in Preventing Macular Degeneration
... damage; one of the key roles of retinal xanthophyll carotenoids, present in high concentrations in photoreceptor outer segments, may be to preserve the native structure of DHA in these photoreceptors.60 In foods and in supplements, lutein and zeaxanthin are found mainly in their ester forms, which u ...
... damage; one of the key roles of retinal xanthophyll carotenoids, present in high concentrations in photoreceptor outer segments, may be to preserve the native structure of DHA in these photoreceptors.60 In foods and in supplements, lutein and zeaxanthin are found mainly in their ester forms, which u ...
LV-04 Outline
... and psychological health states (concern and worry over providing for family). Although financial independence was important, it was not sustainable given the vision loss. Clearly, the importance of driving in rural areas for business and the necessary selfimposed restrictions did not allow the pati ...
... and psychological health states (concern and worry over providing for family). Although financial independence was important, it was not sustainable given the vision loss. Clearly, the importance of driving in rural areas for business and the necessary selfimposed restrictions did not allow the pati ...
Optic Nerve Head and Retinal Nerve Fiber Layer Imaging in
... with corresponding visual field defect. Intraocular pressure (IOP) is considered only a major risk factor and not a diagnostic criterion. At present, clinically visible RNFL defects are considered as the sensitive indicator for early diagnosis of glaucoma. Experimental studies have shown, that local ...
... with corresponding visual field defect. Intraocular pressure (IOP) is considered only a major risk factor and not a diagnostic criterion. At present, clinically visible RNFL defects are considered as the sensitive indicator for early diagnosis of glaucoma. Experimental studies have shown, that local ...
Annual Report 2011 (Word, 80.2KB)
... All technical advances must be rigorously assessed for safety and regulatory compliance to ensure the best outcomes for patients. Our project is no different and the evaluation and management of technical and scientific risk is becoming a further field of priority. This has been an important focus o ...
... All technical advances must be rigorously assessed for safety and regulatory compliance to ensure the best outcomes for patients. Our project is no different and the evaluation and management of technical and scientific risk is becoming a further field of priority. This has been an important focus o ...
A Progressive Anterior Fibrosis Syndrome in Patients With
... often require standard surgical treatment, but more difficult cases with zonular compromise necessitate more advanced techniques. Sutured lenses, capsular tension rings, and artificial irides for photophobia and appearance have been used successfully in these patients.7–9 Ocular surface reconstructi ...
... often require standard surgical treatment, but more difficult cases with zonular compromise necessitate more advanced techniques. Sutured lenses, capsular tension rings, and artificial irides for photophobia and appearance have been used successfully in these patients.7–9 Ocular surface reconstructi ...
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).