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https://www.readbyqxmd.com/read/28101039/multifocal-toric-intraocular-lens-for-traumatic-cataract-in-a-child
#1
Yanfeng Zeng, Licheng Fan, Peirong Lu
A child suffering from traumatic cataract and corneal astigmatism of 2.14 D had a phacoemulsification operation and implantation of a ReSTOR Toric intraocular lens (IOL) to correct the astigmatism. The primary outcome measurements were the uncorrected distance visual acuity (UDVA), uncorrected near vision at 40 cm, intraocular pressure, spherical equivalent refraction, residual astigmatism, corneal astigmatism, presence of unusual optical phenomena, and use of spectacles. At 7 months postoperatively, UDVA was maintained between 16/20 and 24/20, near vision was between J1 and J3, residual spherical refraction was 0-0...
September 2016: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28099241/fmri-with-central-vision-loss-effects-of-fixation-locus-and-stimulus-type
#2
Tina Plank, Jozef Frolo, Sabine Brandl-Rühle, Agnes B Renner, Herbert Jägle, Mark W Greenlee
PURPOSE: In patients with central visual field scotomata, a large part of visual cortex is not adequately stimulated. Patients often use a new eccentric fixation area on intact peripheral retina ("preferred retinal locus"-PRL) that functions as a pseudo-fovea. We used functional magnetic resonance imaging (fMRI) to examine whether stimulating this pseudo-fovea leads to increased activation or altered activation patterns in visual cortex in comparison to stimulating a comparable peripheral area in the opposite hemifield (OppPRL)...
January 18, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28079653/comparison-of-impact-of-monocular-and-integrated-binocular-visual-fields-on-vision-related-quality-of-life
#3
Yeoun Sook Chun, Dong Ik Lee, Jaein Kwon, In Ki Park
PURPOSE OF THE STUDY: The purpose of the study was to investigate the relationship between vision-related quality of life (VRQOL) and mean deviation (MD) of the monocular visual field and integrated binocular visual field (IBVF). METHODS: One hundred eighty VFs (90 pairs) obtained from 90 patients with normal tension glaucoma were included. VRQOL was evaluated using the 25-item National Eye Institute Visual Function Questionnaire (NEI VFQ-25). IBVF was calculated using maximal sensitivity and binocular summation and IBVF MD was calculated...
January 10, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28068445/presbyopic-correction-using-monocular-bi-aspheric-ablation-profile-presbymax-in-hyperopic-eyes-1-year-outcomes
#4
Tommy C Y Chan, Peter S K Kwok, Vishal Jhanji, Victor C P Woo, Alex L K Ng
PURPOSE: To present the 1-year outcomes of combining monocular bi-aspheric ablation profile and contralateral monofocal LASIK in hyperopic patients with presbyopia. METHODS: In this retrospective case series, 36 consecutive patients (72 eyes) who underwent simultaneous bi-aspheric ablation (PresbyMAX: SCHWIND Eye-Tech-Solutions GmbH and Co KG, Kleinostheim, Germany) in the non-dominant eye and monofocal regular LASIK in the dominant eye for correction of hyperopia and presbyopia were reviewed for 1 year...
January 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28057455/comparison-of-botulinum-toxin-with-surgery-for-the-treatment-of-acute-onset-comitant-esotropia-in-children
#5
Michael J Wan, Iason S Mantagos, Ankoor S Shah, Melanie Kazlas, David G Hunter
PURPOSE: To determine whether botulinum toxin is as effective as strabismus surgery in the treatment of acute-onset, comitant esotropia in children. DESIGN: Retrospective, non-randomized, comparative clinical study. METHODS: Setting: Tertiary care pediatric hospital. STUDY POPULATION: 49 children with acute-onset, comitant esotropia. INTERVENTION: Treatment with either botulinum toxin ("chemodenervation group") or standard incisional strabismus surgery ("surgery group")...
January 2, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28051986/wavefront-guided-versus-wavefront-optimized-photorefractive-keratectomy-visual-and-military-task-performance
#6
Denise S Ryan, Rose K Sia, Richard D Stutzman, Joseph F Pasternak, Robin S Howard, Christopher L Howell, Tana Maurer, Mark F Torres, Kraig S Bower
PURPOSE: To compare visual performance, marksmanship performance, and threshold target identification following wavefront-guided (WFG) versus wavefront-optimized (WFO) photorefractive keratectomy (PRK). METHODS: In this prospective, randomized clinical trial, active duty U.S. military Soldiers, age 21 or over, electing to undergo PRK were randomized to undergo WFG (n = 27) or WFO (n = 27) PRK for myopia or myopic astigmatism. Binocular visual performance was assessed preoperatively and 1, 3, and 6 months postoperatively: Super Vision Test high contrast, Super Vision Test contrast sensitivity (CS), and 25% contrast acuity with night vision goggle filter...
January 2017: Military Medicine
https://www.readbyqxmd.com/read/28050460/profile-of-amblyopia-in-school-going-5-15-years-children-at-state-level-referral-hospital-in-uttarakhand
#7
Manisha Gupta, Sudhir Kumar Rana, Sanjiv Kumar Mittal, R N P Sinha
INTRODUCTION: Amblyopia is one of the common causes of childhood visual impairment. The prevalence of amblyopia usually varies according to the age group of the studied population and the factors prevailing in that region. The upper limit of the critical time when amblyopia can develop is around eight years of age and it can be permanent if corrective measures are not taken in time. AIM: The purpose of study was to know the profile and pattern of amblyopia in children aged 5-15 years with refractive error in Uttarakhand and to compare it with national and regional (South Asian) studies...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28033433/covert-spatial-attention-is-functionally-intact-in-amblyopic-human-adults
#8
Mariel Roberts, Rachel Cymerman, R Theodore Smith, Lynne Kiorpes, Marisa Carrasco
Certain abnormalities in behavioral performance and neural signaling have been attributed to a deficit of visual attention in amblyopia, a neurodevelopmental disorder characterized by a diverse array of visual deficits following abnormal binocular childhood experience. Critically, most have inferred attention's role in their task without explicitly manipulating and measuring its effects against a baseline condition. Here, we directly investigate whether human amblyopic adults benefit from covert spatial attention-the selective processing of visual information in the absence of eye movements-to the same degree as neurotypical observers...
December 1, 2016: Journal of Vision
https://www.readbyqxmd.com/read/28031397/electrical-stimulation-of-superior-colliculus-affects-strabismus-angle-in-monkey-models-for-strabismus
#9
Suraj Upadhyaya, Hui Meng, Vallabh E Das
Disruption of binocular vision during the critical period for development leads to eye misalignment in humans and in monkey models. We have previously suggested that disruption within a vergence circuit could be the neural basis for strabismus. Electrical stimulation in the rostral superior colliculus (rSC) leads to vergence eye movements in normal monkeys. Therefore the purpose of this study was to investigate the effect of SC stimulation on eye misalignment in strabismic monkeys. Electrical stimulation was delivered to 51 sites in the intermediate and deep layers of the SC (400Hz, 0...
December 28, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28027276/accommodation-and-phoria-in-children-wearing-multifocal-contact-lenses
#10
Celia R Gong, David Troilo, Kathryn Richdale
PURPOSE: To determine the effect of multifocal contact lenses on accommodation and phoria in children. METHODS: This was a prospective, non-dispensing, randomized, crossover, single-visit study. Myopic children with normal accommodation and binocularity and no history of myopia control treatment were enrolled and fitted with CooperVision Biofinity single vision (SV) and multifocal (MF, +2.50D center distance add) contact lenses. Accommodative responses (photorefraction) and phorias (modified Thorington) were measured at four distances (>3 m, 100 cm, 40 cm, 25 cm)...
December 23, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28007103/comparison-of-the-visual-performance-and-quality-of-vision-with-combined-symmetrical-inferonasal-near-addition-versus-inferonasal-and-superotemporal-placement-of-rotationally-asymmetric-refractive-multifocal-intraocular-lenses
#11
Richard N McNeely, Eric Pazo, Andrew Spence, Olivier Richoz, M Andrew Nesbit, Tara C B Moore, Jonathan E Moore
PURPOSE: To compare the postoperative quality of vision between different bilateral placements of near segments of rotationally asymmetric refractive multifocal intraocular lenses (IOLs) and to determine how this affects visual performance. SETTING: Cathedral Eye Clinic, Belfast, Northern Ireland, United Kingdom. DESIGN: Retrospective comparative case series. METHODS: The study enrolled consecutive patients having refractive lens exchange and implantation of rotationally asymmetric multifocal IOLs...
December 2016: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28003977/combination-of-toric-and-multifocal-intraocular-lens-implantation-in-bilateral-cataract-patients-with-unilateral-astigmatism
#12
Jing-Li Liang, Fang Tian, Hong Zhang, He Teng
AIM: To assess the binocular visual function in bilateral cataract patients with unilateral astigmatism after combined implantations of Toric with multifocal intraocular lens (IOL), and to compare with that of Toric and monofocal IOL implantation. METHODS: All the 30 patients with unilateral astigmatism suffered bilateral cataract were randomly divided into two groups: Toric plus multifocal IOL group and Toric plus monofocal IOL group. Uncorrected and corrected visual acuity at distance (5...
2016: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28002134/neuroplasticity-and-amblyopia-vision-at-the-balance-point
#13
Vijay K Tailor, D Samuel Schwarzkopf, Annegret H Dahlmann-Noor
PURPOSE OF REVIEW: New insights into triggers and brakes of plasticity in the visual system are being translated into new treatment approaches which may improve outcomes not only in children, but also in adults. RECENT FINDINGS: Visual experience-driven plasticity is greatest in early childhood, triggered by maturation of inhibitory interneurons which facilitate strengthening of synchronous synaptic connections, and inactivation of others. Normal binocular development leads to progressive refinement of monocular visual acuity, stereoacuity and fusion of images from both eyes...
December 20, 2016: Current Opinion in Neurology
https://www.readbyqxmd.com/read/28002122/neuroplasticity-and-amblyopia-vision-at-the-balance-point
#14
Vijay K Tailor, D Samuel Schwarzkopf, Annegret H Dahlmann-Noor
PURPOSE OF REVIEW: New insights into triggers and brakes of plasticity in the visual system are being translated into new treatment approaches which may improve outcomes not only in children, but also in adults. RECENT FINDINGS: Visual experience-driven plasticity is greatest in early childhood, triggered by maturation of inhibitory interneurons which facilitate strengthening of synchronous synaptic connections, and inactivation of others. Normal binocular development leads to progressive refinement of monocular visual acuity, stereoacuity and fusion of images from both eyes...
February 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/27984353/reversible-charles-bonnet-syndrome-after-oculoplastic-procedures
#15
Robert A Beaulieu, Diana A Tamboli, Blair K Armstrong, R Nick Hogan, Ronald Mancini
Individuals with Charles Bonnet syndrome (CBS) typically have severe visual loss and experience visual hallucinations yet have no psychiatric disease. Visual impairment often is due to end-stage glaucoma or macular degeneration. We report 3 cases of CBS in patients who underwent an oculoplastic surgical procedure. One patient experienced binocular visual distortion due to excessive topical ophthalmic ointment, and 2 patients experienced monocular visual impairment from patching. Visual hallucinations resolved once vision returned to baseline...
December 14, 2016: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/27982220/amblyopia-neural-basis-and-therapeutic-approaches
#16
Caio César Peixoto Bretas, Renato Nery Soriano
Abnormalities in visual processing caused by visual deprivation or abnormal binocular interaction may induce amblyopia, which is characterized by reduced visual acuity. Occlusion therapy, the conventional treatment, requires special attention as occlusion of the fellow normal eye may reduce its visual acuity and impair binocular vision. Besides recovering visual acuity, some researchers have recommended restoration of stereoacuity and motor fusion and reverse suppression in order to prevent diplopia. Recent studies have documented that the amblyopic visual cortex has a normal complement of cells but reduced spatial resolution and a disordered topographical map...
September 2016: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/27980119/noisy-spiking-in-visual-area-v2-of-amblyopic-monkeys
#17
Y Wang, B Zhang, X Tao, J M Wensveen, E L Smith, Y M Chino
: Interocular decorrelation of input signals in developing visual cortex can cause impaired binocular vision and amblyopia. While increased 'intrinsic noise' is thought to be responsible for a range of perceptual deficits in amblyopic humans, the neural basis for the elevated perceptual noise in amblyopic primates is not known. Here we tested the idea that perceptual noise is linked to the neuronal spiking noise (variability) resulting from developmental alterations in cortical circuitry...
December 15, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27978549/measurement-of-crosstalk-in-stereoscopic-display-systems-used-for-vision-research
#18
Daniel H Baker, Milena Kaestner, André D Gouws
Studying binocular vision requires precise control over the stimuli presented to the left and right eyes. A popular technique is to segregate signals either temporally (frame interleaving), spectrally (using colored filters), or through light polarization. None of these segregation methods achieves perfect isolation, and so a degree of crosstalk is usually apparent, in which signals intended for one eye are faintly visible to the other eye. Previous studies have reported crosstalk values mostly for consumer-grade systems...
December 1, 2016: Journal of Vision
https://www.readbyqxmd.com/read/27928379/a-rare-case-of-penetrating-trauma-resulting-in-isolated-third-nerve-palsy
#19
Caleb Story, Michael Patterson, Wilson McWilliams, Bethany Bray Markowitz
A 23-year-old male presented to the emergency department with right eye pain, right upper eyelid ptosis, blurry vision, and binocular diplopia that developed immediately after he bent over in a parking lot and the antenna of a car penetrated his right upper eyelid. An extensive workup was performed, and he was found to have an isolated traumatic oculomotor nerve palsy with pupil involvement. No other ocular findings of a traumatic injury were present. The patient was observed for 14 months, during which he continually improved, with almost complete resolution of his diplopia, anisocoria, and ptosis...
February 2016: Neuro-ophthalmology
https://www.readbyqxmd.com/read/27919101/the-risk-of-pedestrian-collisions-with-peripheral-visual-field-loss
#20
Eli Peli, Henry Apfelbaum, Eliot L Berson, Robert B Goldstein
Patients with peripheral field loss complain of colliding with other pedestrians in open-space environments such as shopping malls. Field expansion devices (e.g., prisms) can create artificial peripheral islands of vision. We investigated the visual angle at which these islands can be most effective for avoiding pedestrian collisions, by modeling the collision risk density as a function of bearing angle of pedestrians relative to the patient. Pedestrians at all possible locations were assumed to be moving in all directions with equal probability within a reasonable range of walking speeds...
1, 2016: Journal of Vision
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