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Optometry and Vision Science: Official Publication of the American Academy of Optometry

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https://www.readbyqxmd.com/read/30383613/optometry-and-biomedical-sciences
#1
Michael D Twa
No abstract text is available yet for this article.
November 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30339645/parametric-covariability-in-the-standard-model-of-the-saccadic-main-sequence
#2
Claudio Busettini, Jennifer Braswell Christy
SIGNIFICANCE: Saccades present a direct relationship between the size of the movement (SACSIZE) and its peak velocity (SACPEAK), the main sequence, which is traditionally quantified using the model SACPEAK = Vmax × (1 - e). This study shows that Vmax and SAT are not veridical indicators of saccadic dynamics. PURPOSE: Alterations in saccadic dynamics are used as a diagnostic tool. Are the 95% reference ranges (RRs) of Vmax and SAT correctly quantifying the variability in saccadic dynamics of a population? METHODS: Visually driven horizontal and vertical saccades were acquired from 116 normal subjects using the Neuro Kinetics Inc...
November 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30339644/presbyopic-personal-computer-work-a-comparison-of-progressive-addition-lenses-for-general-purpose-and-personal-computer-work
#3
Oliver Kolbe, Stephan Degle
SIGNIFICANCE: Computer-specific progressive addition lenses (PC-PALs) are shown to reduce computer vision syndrome (CVS) symptoms, increase visual comfort and tolerance, and improve body posture at the personal computer. They are highly preferred by computer workers. Increasing their use may aid prevention measures within the workplace health management. PURPOSE: This study investigates whether technical differences between general-purpose progressive addition lenses (GP-PALs) and PC-PALs are subjectively manifest in CVS...
November 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30339643/can-applications-designed-to-evaluate-visual-function-be-used-in-different-ipads
#4
Dolores de Fez, María José Luque, Mari Carmen García-Domene, Maria Teresa Caballero, Vicente J Camps
SIGNIFICANCE: Apple devices could be suitable for vision tests, provided that the test has been correctly adapted to the device, after considering the spatial and colorimetric characterization of the screen. PURPOSE: The majority of vision applications has not been developed by vision or colorimetry experts and suffers from conceptual and design errors that may lead average users to an erroneous assessment of their visual capabilities. The reliability of vision tests depends on the accurate generation of the necessary visual stimuli in a particular device...
November 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30339642/the-area-under-the-main-sequence-as-an-alternative-method-to-measure-saccadic-dynamics
#5
Claudio Busettini, Jennifer Braswell Christy
SIGNIFICANCE: This study shows that the area under the main sequence (MSAREA) is a valid alternative to the standard peak-velocity main sequence in measuring saccadic dynamics. A one-parameter area model, MSAREA = GPW = 1.55 × SACSIZE, with SACSIZE as the size of the saccade, 1.55 as a power factor, and GPW = 1.55 as a gain parameter, is presented. PURPOSE: SACPEAK = Vmax × (1 - e) is the traditional model used to describe the saccadic main sequence, the relationship between the size of the movement and its peak velocity (SACPEAK)...
November 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30339641/case-report-penetrating-corneal-injury-under-an-intact-laser-assisted-in-situ-keratomileusis-flap
#6
Sarah Maki, Joshua H Hou
SIGNIFICANCE: As the prevalence of post-laser-assisted in situ keratomileusis (LASIK) patients rises, recognition of possible traumatic complications and their management in this population becomes increasingly relevant. Penetrating injuries and intraocular foreign bodies are possible in post-LASIK corneas despite an intact anterior corneal surface. However, with prompt recognition and treatment, excellent visual recovery can be achieved. PURPOSE: The purpose of this study was to report an interesting case of a penetrating foreign body through an intact LASIK flap...
November 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30339640/ocular-component-development-during-infancy-and-early-childhood
#7
Donald O Mutti, Loraine T Sinnott, G Lynn Mitchell, Lisa A Jordan, Nina E Friedman, Sara L Frane, Wendy K Lin
SIGNIFICANCE: The study fills an important gap by providing a longitudinal description of development of the major structural and optical components of the human eye from 3 months to nearly 7 years of age. Normative development data may provide insights into mechanisms for emmetropization and guidance on intraocular lens power calculation. PURPOSE: The purpose of this study was to describe the pattern of development of refractive error and the ocular components from infancy through early childhood...
November 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30339639/unwanted-astigmatism-and-high-order-aberrations-one-year-after-excimer-and-femtosecond-corneal-surgery
#8
Maja Bohac, Mateja Koncarevic, Adrijana Dukic, Alma Biscevic, Vesna Cerovic, Maja Merlak, Nikica Gabric, Sudi Patel
SIGNIFICANCE: Small incision lenticule extraction (SMILE) is advanced as the most minimally invasive and least traumatic corneal procedure for correcting refractive errors using a single laser. Although SMILE obtains similar results to femtosecond laser in situ keratomileusis (LASIK) with spherical myopia, it has deficiencies in astigmatism correction. PURPOSE: The purpose of this study was to compare refractive outcomes and high-order aberrations (HOAs) between SMILE and femtosecond LASIK corneal procedures at 1 year post-operative...
November 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30339638/predictive-potential-of-eyelids-and-tear-film-in-determining-symptoms-in-contact-lens-wearers
#9
Jaya Sowjanya Siddireddy, Jacqueline Tan, Ajay Kumar Vijay, Mark Willcox
SIGNIFICANCE: Early diagnosis of clinical markers of contact lens discomfort can help clinicians set realistic expectations and monitor and provide prophylactic management for contact lens wearers. PURPOSE: The purpose of this study was to evaluate the potential of eyelid- and tear film-related clinical markers to be used as predictive factors for diagnosing discomfort in contact lens wearers. METHODS: A cross-sectional study was performed on 30 contact lens wearers (6 male, 24 female) with median age of 23 years (range, 18 to 41 years)...
November 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30339637/cornea-full-field-displacement-and-strain-measurement-in-vivo-using-three-dimensional-digital-image-correlation
#10
Xueyong Zhang, Qing Wang, Like Wang, Hong Xiao, Daming Zhang, Rongfeng Liao, Yongping Zheng
SIGNIFICANCE: Corneal biomechanics are becoming increasingly important for clinical evaluation and diagnosis, such as in refractive surgery, glaucoma, and keratoconus. We developed and used a new technique to measure the full-field displacement and strain of the cornea under elevated intraocular pressure in vivo. PURPOSE: In this study, we propose a three-dimensional digital image correlation method for the determination of corneal biomechanical properties. METHODS: Corneal deformation change on the rabbit eyeball was investigated under different inflation conditions with intraocular pressure levels of 2...
November 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30339636/case-series-bilateral-homonymous-visual-field-defects-due-to-bilateral-ischemic-strokes
#11
Eleni Papageorgiou, Nikolaos Anthis, Theodora Stathi, Evangelia Tsironi, Ioannis Asproudis
SIGNIFICANCE: Bilateral strokes are rare and should be considered when patients present with bilateral visual field loss characterized by patterns consistent with right and left-sided homonymous visual field defects. Perimetry, dilated funduscopy, and immediate neuroimaging are mandatory for diagnosis, because patients may present with vague symptoms. These cases reflect the retinotopic features of the striate cortex. PURPOSE: The purposes of this study were to describe the unusual presentation of bilateral homonymous visual field defects in three patients with bilateral ischemic strokes and to discuss the clinical and neuroanatomical correlations...
November 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30277925/optometric-research-summit-2018
#12
Michael D Twa
No abstract text is available yet for this article.
October 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30247238/neutralizing-peripheral-refraction-eliminates-refractive-scotomata-in-tilted-disc-syndrome
#13
Jack Phu, Henrietta Wang, Sephora Miao, Lydia Zhou, Sieu K Khuu, Michael Kalloniatis
SIGNIFICANCE: We demonstrate that the visual field defects in patients with tilted disc syndrome can be reduced or eliminated by neutralizing the peripheral scotoma in the area of posterior retinal bowing, which may allow differentiation between a congenital anomaly and acquired pathology. PURPOSE: Tilted disc syndrome is a congenital and unchanging condition that may present with visual field defects mimicking loss seen in neurological diseases, such as transsynaptic retrograde degeneration...
October 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30247237/the-relationship-between-progression-in-axial-length-corneal-radius-of-curvature-ratio-and-spherical-equivalent-refractive-error-in-myopia
#14
Monica Jong, Padmaja Sankaridurg, Thomas John Naduvilath, Wayne Li, Mingguang He
SIGNIFICANCE: This study demonstrates that mean axial length/corneal radius of curvature ratio (AL/CR) can be used to detect low and high myopia but cannot clinically monitor myopia progression because the relationship between AL/CR and progression in myopia is different between low and high myopia. PURPOSE: The purpose of this study was to investigate the relationship of AL/CR with magnitude and progression of myopia. METHODS: Retrospective analysis was conducted comparing the right eyes of those with high myopia (n = 308; age, 7 to 16 years; myopia sphere, -6...
October 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30234832/tear-lactoferrin-and-features-of-ocular-allergy-in-different-severities-of-meibomian-gland-dysfunction
#15
Cecilia Chao, Louis Tong
SIGNIFICANCE: Meibomian gland dysfunction, but not atrophy, was associated with lower tear lactoferrin concentration, greater dry eye, and allergic symptoms, indicating greater inflammation and discomfort in patients with lower meibomian gland expressibility. PURPOSE: Meibomian gland dysfunction can potentially damage adjacent palpebral structures, which may induce inflammation in accessory lacrimal glands and affect lactoferrin secretion. This study aimed to examine the relationships between the severity of meibomian gland dysfunction with tear lactoferrin, conjunctival cell morphology, and clinical features of ocular allergy...
October 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30234831/case-report-importance-of-b-scan-ultrasonography-for-the-detection-of-choroidal-melanoma
#16
Margaret A Wilczek, Aaron S Gold, Fiona J Ehlies, Timothy G Murray
SIGNIFICANCE: This case highlights the importance of using ultrasonography to evaluate an eye that has no clear view of the fundus. PURPOSE: Uveal melanoma stems from melanocytes found in the iris, ciliary body, and choroid, and it is the most common primary intraocular malignancy found in adults. The lesion is identified predominantly via fundus biomicroscopy and binocular indirect ophthalmoscopy. The authors present a unique case where visual evaluation of the fundus was not possible, and ultrasonography was used to assess the retina and choroid...
October 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30234830/shelf-life-and-efficacy-of-diagnostic-eye-drops
#17
Jean-Marie Hanssens, Carolina Quintana-Giraldo, Sandrine Jacques, Nohade El-Zoghbi, Vanessa Lampasona, Camille Langevin, Jean-François Bouchard
SIGNIFICANCE: Pharmaceutical companies recommend discarding ophthalmic drugs 28 days after opening. This study shows that diagnostic eye drops have a low risk of contamination over a 7-month period in a controlled clinical setup. The diagnostic efficiency seems to be preserved over this period. PURPOSE: The aim of this study was to evaluate the preservation period and the efficacy of ophthalmic preparations, such as 0.5% proparacaine hydrochloride, 1% tropicamide, 2...
October 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30234829/iphone-based-pupillometry-a-novel-approach-for-assessing-the-pupillary-light-reflex
#18
J Jason McAnany, Brandon M Smith, Amy Garland, Steven L Kagen
SIGNIFICANCE: The response of the pupil to a flash of light, the pupillary light reflex (PLR), is an important measure in optometry and in other fields of medicine that is typically evaluated by qualitative observation. Here we describe a simple, portable, iPhone-based pupillometer that quantifies the PLR in real time. PURPOSES: The purposes of this study were to describe a novel application that records the PLR and to compare its technical capabilities with a laboratory-based infrared (IR) camera system...
October 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30234828/development-of-silicone-hydrogel-antimicrobial-contact-lenses-with-mel4-peptide-coating
#19
Debarun Dutta, Bjorn Kamphuis, Berkay Ozcelik, Helmut Thissen, Rasim Pinarbasi, Naresh Kumar, Mark D P Willcox
SIGNIFICANCE: This study investigated the development of an antimicrobial coating on silicone hydrogel contact lenses that may have the capacity to reduce contact lens-related infection and inflammatory events. PURPOSE: The purpose of this study was to develop an effective antimicrobial coating for silicone hydrogel contact lenses by attachment of Mel4 peptide. METHODS: Lotrafilcon A, comfilcon A, somofilcon A, senofilcon A, and lotrafilcon B silicone hydrogel contact lenses were plasma coated with acrylic acid followed by Mel4 antimicrobial peptide immobilization by covalent coupling...
October 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/30179995/juvenile-tree-shrews-do-not-maintain-emmetropia-in-narrow-band-blue-light
#20
Timothy J Gawne, Alexander H Ward, Thomas T Norton
SIGNIFICANCE: In spectrally broad-band light, an emmetropization mechanism in post-natal eyes uses visual cues to modulate the growth of the eye to achieve and maintain near emmetropia. When we restricted available wavelengths to narrow-band blue light, juvenile tree shrews (diurnal dichromatic mammals closely related to primates) developed substantial refractive errors, suggesting that feedback from defocus-related changes in the relative activation of long- and short-wavelength-sensitive cones is essential to maintain emmetropia...
October 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
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