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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/29252906/tear-film-evaporation-rate-from-simultaneous-ocular-surface-temperature-and-tear-breakup-area
#1
Thomas J Dursch, Wing Li, Baseem Taraz, Meng C Lin, Clayton J Radke
SIGNIFICANCE: A corneal heat-transfer model is presented to quantify simultaneous measurements of fluorescein tear-breakup area (TBA) and ocular-surface temperature (OST). By accounting for disruption of the tear-film lipid layer (TFLL), we report evaporation rates through lipid-covered tear. The modified heat-transfer model provides new insights into evaporative dry eye. PURPOSE: A quantitative analysis is presented to assess human aqueous tear evaporation rate (TER) through intact TFLLs from simultaneous in vivo measurement of time-dependent infrared OST and fluorescein TBA...
December 15, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29252905/higher-order-aberrations-in-children-and-adolescents-of-southwest-china
#2
Ning Zhang, Longqian Liu, Bi Yang, Wei Ma, Xue Wang, Wu Ye, Xubo Yang, Carly S Y Lam
SIGNIFICANCE: This study provides a descriptive characterization of higher-order optical aberrations for the eyes of a larger number of Chinese children and adolescents. PURPOSE: To determine the distribution of higher-order aberrations (HOAs) of Han Chinese young subjects with normal vision and their relationship to age. METHODS: Children and adolescents, aged from 3 to 17 years, with normal visual acuity were enrolled, and their wavefront aberrations for a 6-mm pupil were evaluated by the Zywave II aberrometer...
December 15, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29252904/assessment-of-tear-film-using-videokeratoscopy-based-on-fractal-dimension
#3
Clara Llorens-Quintana, D Robert Iskander
SIGNIFICANCE: The proposed automated approach for estimating the quality of the tear film closes the gap between the manual and automated assessment, translating the high-speed videokeratoscopy technology from scientific laboratories to a clinical practice. PURPOSE: To develop and test a new method for characterizing Tear Film Surface Quality with high-speed videokeratoscopy utilizing a fractal dimension approach. METHODS: The regularity of the reflected pattern in high-speed videokeratoscopy (E300; Medmont) depends on tear film stability...
December 15, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29252903/case-series-overnight-wear-of-scleral-lens-for-persistent-epithelial-defects
#4
Xu He, Kendall E Donaldson, Victor L Perez, Priscilla Sotomayor
SIGNIFICANCE: This case series demonstrates successful use of PROSE (Prosthetic Replacement of the Ocular Surface Ecosystem) for overnight wear among patients with persistent epithelial defects, while exploring the efficacy of using PROSE reservoir for autologous hematopoietic products during treatment. PURPOSE: This case series proposes a strategic approach to the treatment of refractory cases of persistent epithelial defect via overnight PROSE device wear. CASE REPORTS: We followed three patients with persistent epithelial defect treated with PROSE devices and observed expedited defect resolution and improvement in best-corrected visual acuity over the course of 2 to 4 weeks...
December 15, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29252902/factors-influencing-visual-acuity-in-fuchs-endothelial-corneal-dystrophy
#5
Hidenaga Kobashi, Kazutaka Kamiya, Kimiya Shimizu
SIGNIFICANCE: In eyes with mild Fuchs' endothelial corneal dystrophy without significant corneal edema, objective scattering index has the strongest influence on distance visual acuity, followed by the anterior corneal densitometry. Our findings suggest that distance visual acuity deteriorates in eyes with higher forward light scatter. PURPOSE: To evaluate the factors affecting distance visual acuity in patients with Fuchs' endothelial corneal dystrophy. METHODS: This retrospective study comprised 31 eyes of 31 patients with mild Fuchs' dystrophy without corneal edema and 25 eyes of 25 age-matched healthy subjects...
December 15, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29252900/accommodation-in-early-presbyopes-fit-with-bilateral-or-unilateral-near-add
#6
Meznah S Almutairi, Basal H Altoaimi, Arthur Bradley
SIGNIFICANCE: When fit with monovision, most early presbyopes (aged 40 to 50 years) accommodated to near objects by focusing the distance corrected eye, leaving the near corrected eye myopically defocused with reduced image quality. A few were able to switch focus to the near corrected eye retaining a consistently focused image in one eye over a wider range of distances. PURPOSE: The aim of this study was to examine accommodation behavior, pupil responses, and resultant image quality of early presbyopes fit with either bilateral or unilateral (monovision) near adds...
December 15, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29239906/nerve-growth-factor-changes-and-corneal-nerve-repair-after-keratoplasty
#7
Yueji Pan, Fang Liu, Xiaofeng Qi, Yuan Hu, Feihong Xu, Hui Jia
SIGNIFICANCE: Measured tear concentration of nerve growth factor is correlated with postoperative corneal reinnervation among patients who undergo keratoplasty. This may be a future therapeutic target for post-keratoplasty corneal nerve regeneration. PURPOSE: To determine the relationship between changes in the content of nerve growth factor (NGF) in tear fluid and corneal subepithelial nerve regeneration in patients after keratoplasty. METHODS: In this retrospective study, 30 eyes of 28 patients (15 males, 13 females; mean age 42...
December 13, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29135718/case-report-adenocarcinoma-of-the-lacrimal-gland-presenting-as-an-abduction-deficit
#8
Crystal L DeLuca, Regina E Zimmers
SIGNIFICANCE: It is imperative to follow the clinical guidelines for abduction deficits to ensure prompt diagnosis of potentially serious etiologies and monitor only those in which a microvascular etiology is most likely. This case reports highlights a rare diagnosis of a malignant tumor of the lacrimal gland presenting as an abduction deficit. PURPOSE: Tumors of the lacrimal gland can cause abduction deficits, which may mimic an abducens nerve palsy. Abducens nerve palsies are often encountered by optometrists...
November 11, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29120977/use-of-a-scan-ultrasound-and-optical-coherence-tomography-to-differentiate-papilledema-from-pseudopapilledema
#9
Roberto Saenz, Han Cheng, Thomas C Prager, Laura J Frishman, Rosa A Tang
SIGNIFICANCE: Differentiating papilledema from pseudopapilledema reflecting tilted/crowded optic discs or disc drusen is critical but can be challenging. Our study suggests that spectral-domain optical coherence tomography (OCT) peripapillary retinal nerve fiber layer thickness and retrobulbar optic nerve sheath diameter (ONSD) measured by A-scan ultrasound provide useful information when differentiating the two conditions. PURPOSE: To evaluate the use of A-scan ultrasound and spectral-domain OCT retinal nerve fiber layer thickness (RNFLT) in differentiating papilledema associated with idiopathic intracranial hypertension from pseudopapilledema...
November 9, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29120976/case-report-masquerading-large-vessel-giant-cell-arteritis
#10
Paul Jacquier, Raphael Wuarin, Carlo Chizzolini, Gabriele Thumann, Heimo Steffen, Argyrios Chronopoulos
SIGNIFICANCE: Large-vessel giant cell arteritis (GCA) can be a diagnostic dilemma for the eye care provider because it may not involve the typical cranial arteries. When any of its potential ocular complications are diagnosed, it is important to consider this unusual form of GCA. PURPOSE: To report an unusual ophthalmic presentation of large-vessel GCA with sequential bilateral anterior ischemic optic neuropathy and branch retinal artery occlusion. METHODS: A 65-year-old previously healthy woman experienced sequential bilateral anterior ischemic optic neuropathy with branch retinal artery occlusion in the absence of other signs and symptoms suggestive of cranial GCA...
November 9, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29120975/refractive-error-in-a-sample-of-black-high-school-children-in-south-africa
#11
Samuel Otabor Wajuihian, Rekha Hansraj
SIGNIFICANCE: This study focused on a cohort that has not been studied and who currently have limited access to eye care services. The findings, while improving the understanding of the distribution of refractive errors, also enabled identification of children requiring intervention and provided a guide for future resource allocation. PURPOSE: The aim of conducting the study was to determine the prevalence and distribution of refractive error and its association with gender, age, and school grade level...
November 9, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29116953/identification-of-an-nd4-mutation-in-leber-hereditary-optic-neuropathy
#12
Qian Lu, Yi Guo, Junhui Yi, Xiong Deng, Zhijian Yang, Xiuhong Yuan, Hao Deng
SIGNIFICANCE: We identified a missense mutation, m.11778G>A (p.R340H), in the mitochondrially encoded NADH dehydrogenase 4 gene (ND4) in eight patients and three asymptomatic carriers, even though the incidence of this has been considered low in Chinese population. These results have implications for the families' genetic counseling and clinical management. PURPOSE: Leber hereditary optic neuropathy (LHON OMIM 535000) is one of the most common inherited optic neuropathies...
November 8, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29116952/a-model-of-the-effect-of-lens-development-on-refraction-in-schoolchildren
#13
Ji C He
SIGNIFICANCE: The study provides a new theory on the mechanism underlying myopia development, and it could be useful in clinical practice to control myopia development in schoolchildren. PURPOSE: To model the effect of the crystalline lens on refractive development in schoolchildren. METHODS: The Zemax 13 was used to calculate Zernike aberrations and refractions across 50┬░ horizontal visual fields. Optical effects of the anterior chamber depth, lens thickness, and radii of curvature of the lens surfaces on refractions were modeled...
November 8, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29095758/patient-reported-outcomes-for-assessment-of-quality-of-life-in-refractive-error-a-systematic-review
#14
Himal Kandel, Jyoti Khadka, Michael Goggin, Konrad Pesudovs
SIGNIFICANCE: This review has identified the best existing patient-reported outcome (PRO) instruments in refractive error. The article highlights the limitations of the existing instruments and discusses the way forward. PURPOSE: A systematic review was conducted to identify the types of PROs used in refractive error, to determine the quality of the existing PRO instruments in terms of their psychometric properties, and to determine the limitations in the content of the existing PRO instruments...
November 1, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29280781/scleral-lens-clearance-assessment-with-biomicroscopy-and-anterior-segment-optical-coherence-tomography
#15
Debby Yeung, Luigina Sorbara
SIGNIFICANCE: It is important to be able to accurately estimate the central corneal clearance when fitting scleral contact lenses. Tools available have intrinsic biases due to the angle of viewing, and therefore an idea of the amount of error in estimation will benefit the fitter. PURPOSE: To compare the accuracy of observers' ability to estimate scleral contact lens central corneal clearance (CCC) with biomicroscopy to measurements using slit-lamp imaging and anterior segment optical coherence tomography (AS-OCT)...
January 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29280780/new-editorial-board-talent
#16
Michael D Twa
No abstract text is available yet for this article.
January 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29252907/case-report-acute-hydrops-with-descemet-membrane-schisis-in-corneal-ectasia-after-radial-keratotomy
#17
Wenjia Xie, Yesheng Xu, Yu-Feng Yao
SIGNIFICANCE: As patients with previous radial keratotomy (RK) are still occasionally encountered, recognition of the anatomy of post-RK corneas and management of their complications remain relevant. High-definition anterior segment optical coherence tomography (AS-OCT) is a very useful tool to assess these postsurgical corneas. PURPOSE: To describe a case of acute corneal hydrops with Descemet membrane schisis after RK with observation by AS-OCT. CASE REPORT: A 43-year-old woman presented with a 9-day history of sudden vision loss, foreign body sensation, and photophobia in her left eye...
January 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29252901/mechanisms-of-image-stabilization-in-central-vision-loss-smooth-pursuit
#18
Esther G González, Luminita Tarita-Nistor, Efrem Mandelcorn, Mark Mandelcorn, Martin J Steinbach
SIGNIFICANCE: In addition to understanding the adaptive mechanisms of eccentric viewing during smooth pursuit, the ocular motor adaptations of patients with central vision loss give us a better understanding of the basic mechanisms of smooth pursuit in the healthy visual system. PURPOSE: For patients with age-related macular degeneration and controls with normal vision, we examined the closed-loop gain of horizontal and vertical smooth pursuit eye movements as a function of stimulus speed and direction...
January 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29194230/2017-american-academy-of-optometry-ocular-photography-contest
#19
(no author information available yet)
No abstract text is available yet for this article.
December 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29194229/patient-physician-communication-on-medication-cost-during-glaucoma-visits
#20
Catherine Slota, Scott A Davis, Susan J Blalock, Delesha M Carpenter, Kelly W Muir, Alan L Robin, Betsy Sleath
SIGNIFICANCE: This article is the first to investigate the nature of medication cost discussions between ophthalmologists and glaucoma patients. Only 87 of the 275 office visits analyzed had a discussion of medication cost. Providers should consider discussing medication cost with patients to identify potential cost-related barriers to medication use. PURPOSE: Glaucoma is an incurable chronic eye disease affecting a growing portion of the aging population. Some of the most commonly utilized treatments require lifelong use, requiring high patient adherence to ensure effectiveness...
December 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
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