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Eye and Vision (London, England)

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https://www.readbyqxmd.com/read/30009195/comparison-of-cross-sectional-optical-coherence-tomography-images-of-elevated-optic-nerve-heads-across-acquisition-devices-and-scan-protocols
#1
Megh D Patel, Fareshta Khushzad, Heather E Moss
Background: Optic nerve head measurements extracted from optical coherence tomography (OCT) show promise for monitoring clinical conditions with elevated optic nerve heads. The aim of this study is to compare reliability within and between raters and between image acquisition devices of optic nerve measurements derived from OCT scans in eyes with varying degrees of optic nerve elevation. Methods: Wide angle line scans and narrow angle radial scans through optic nerve heads were obtained using three spectral domain(SD) OCT devices on 5 subjects (6 swollen optic nerves, 4 normal optic nerves)...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/30003116/long-scan-depth-optical-coherence-tomography-on-imaging-accommodation-impact-of-enhanced-axial-resolution-signal-to-noise-ratio-and-speed
#2
Yilei Shao, Aizhu Tao, Hong Jiang, Meixiao Shen, Dexi Zhu, Fan Lu, Carol L Karp, Yufeng Ye, Jianhua Wang
Background: Spectral domain optical coherence tomography (SD-OCT) was a useful tool to study accommodation in human eye, but the maximum image depth is limited due to the decreased signal-to-noise ratio (SNR). In this study, improving optical resolutions, speeds and the SNR were achieved by custom built SD-OCT, and the evaluation of the impact of the improvement during accommodation was investigated. Methods: Three systems with different spectrometer designs, including two Charge Coupled Device (CCD) cameras and one Complementary Metal-Oxide-Semiconductor Transistor (CMOS) camera, were tested...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29977949/optical-coherence-tomography-angiography-at-the-acute-phase-of-optic-disc-edema
#3
Marie-Bénédicte Rougier, Mélanie Le Goff, Jean-François Korobelnik
Background: The differential diagnosis of optic disc edema at the acute phase can be challenging. OCT angiography (OCTA) is a new technology allowing the visualization of the peripapillary vascular network and optic disc capillaries. The peripapillary network alterations of glaucoma and chronic non-arteritic anterior ischemic optic neuropathy (NAION) were reported. However, no OCTA studies on acute optic disc edema from various causes. The aim of this project was to use OCTA to demonstrate the vascular changes the optic nerve head of various types of optic disc edema at the acute phase...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29951559/altered-birefringence-of-peripapillary-retinal-nerve-fiber-layer-in-multiple-sclerosis-measured-by-polarization-sensitive-optical-coherence-tomography
#4
Hong Jiang, Wan Chen, Silvia Delgado, Yi Liu, Ying Lin, Jianhua Wang
Background: The retina has been used to study the pathophysiology of multiple sclerosis (MS). Peripapillary retinal nerve fiber layer (pRNFL) thinning has been suggested as an ocular biomarker of neurodegeneration in MS. The goal of this project was to determine the birefringence of the pRNFL by measuring the fiber birefringence using polarization sensitive optical coherence tomography (PS-OCT). Methods: Sixty-six MS patients without history of optic neuritis (age: 39...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29942817/optical-coherence-tomography-for-ocular-surface-and-corneal-diseases-a-review
#5
REVIEW
Nandini Venkateswaran, Anat Galor, Jianhua Wang, Carol L Karp
The advent of optical coherence tomography (OCT) imaging has changed the way ophthalmologists image the ocular surface and anterior segment of the eye. Its ability to obtain dynamic, high and ultra-high resolution, cross-sectional images of the ocular surface and anterior segment in a noninvasive and rapid manner allows for ease of use. In this review, we focus on the use of anterior segment OCT, which provides an "optical biopsy" or in vivo imaging of various ocular surface and corneal pathologies, allowing the clinician to diagnose diseases otherwise not visualized by traditional methods...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29796404/relative-peripheral-refraction-across-4-meridians-after-orthokeratology-and-lasik-surgery
#6
António Queirós, Ana Amorim-de-Sousa, Daniela Lopes-Ferreira, César Villa-Collar, Ángel Ramón Gutiérrez, José Manuel González-Méijome
Background: To characterize the axial and off-axis refraction across four meridians of the retina in myopic eyes before and after Orthokeratology (OK) and LASIK surgery. Methods: Sixty right eyes with a spherical equivalent (M) between - 0.75 to - 5.25 D (cylinder <- 1.00 D) underwent LASIK (n = 26) or OK (n = 34) to treat myopia. Axial and off-axis refraction were measured with an open-field autorefractometer before and after stabilized treatments. Off-axis measurements were obtained for the horizontal (35° nasal and temporal retina) and vertical (15° superior and inferior retina) meridians, and for two oblique directions (45-225° and 135-315°) up to 20° of eccentricity...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29796403/emerging-applications-of-optical-coherence-tomography-angiography-octa-in-neurological-research
#7
REVIEW
Liang Wang, Olwen Murphy, Natalia Gonzalez Caldito, Peter A Calabresi, Shiv Saidha
Purpose: To review the clinical and research value of optical coherence tomography angiography (OCTA) in the field of neurology. Methods: Current literature involving OCTA were reviewed through PubMed using the search terms "optical coherence tomography angiography", with "multiple sclerosis", "Alzheimer's disease", "optic neuropathy", or other closely-related terms. Results: OCTA has been applied in research to advance our understanding of the pathobiology of neurological disorders...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29785407/unusual-occurrence-of-orbital-hemangiopericytoma-in-the-zygomatic-bone-of-an-adolescent-a-case-report
#8
Bahram Eshraghi, Hadi Ghadimi, Zohreh Nozarian
Background: Hemangiopericytoma and solitary fibrous tumor are considered related variants on the same spectrum and both may essentially be the same tumor. They are infrequently encountered in the orbital region while the zygomatic bone is an extremely rare location for these neoplasms to occur. Case presentation: A 14-year-old boy presented with complaint of deformity of left infraorbital area and a firm, regular mass in the region. Orbital CT scan revealed a well-defined round isodense intraosseous lesion in the lowermost portion of the lateral orbital wall (zygomatic bone), expanding the bone and protruding anteriorly and medially...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29736407/investigating-the-impact-of-preoperative-corneal-astigmatism-orientation-on-the-postoperative-spherical-equivalent-refraction-following-intraocular-lens-implantation
#9
Richard N McNeely, Salissou Moutari, Eric Pazo, Jonathan E Moore
Background: To investigate the impact of the orientation of preoperative corneal astigmatism on achieving the postoperative target refraction following monofocal intraocular lens (IOL) implantation. Methods: This study enrolled 339 eyes who had uneventful cataract surgery or refractive lens exchange (RLE) with subsequent monofocal IOL implantation. Eyes were initially categorized dependent upon axial length and then on the orientation of preoperative anterior corneal astigmatism...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29725607/utility-of-combining-spectral-domain-optical-coherence-tomography-structural-parameters-for-the-diagnosis-of-early-glaucoma-a-mini-review
#10
REVIEW
Jean-Claude Mwanza, Joshua L Warren, Donald L Budenz
Optical coherence tomography (OCT) has moved to the forefront of imaging modalities in the management of glaucoma and retinal diseases. It is modifying how glaucoma and glaucoma progression are diagnosed clinically and augmenting our understanding of the disease. OCT provides multiple parameters from various anatomic areas for glaucoma diagnosis, evaluation of treatment efficacy, and progression monitoring. While the use of multiple parameters has increased the likelihood of detecting early structural changes, diagnosing glaucoma in early stages is often challenging when the damages are subtle and not apparent on OCT scans, in addition to the fact that assessment of OCT parameters often yields conflicting findings...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29713653/comparison-of-clinical-outcomes-between-femtosecond-laser-assisted-versus-conventional-phacoemulsification
#11
Robert Edward Ty Ang, Michelle Marie Salcedo Quinto, Emerson Marquez Cruz, Mark Christian Reyes Rivera, Gladness Henna Austria Martinez
Background: To compare femtosecond laser-assisted versus conventional phacoemulsification in terms of visual and refractive outcomes, cumulative dissipated energy, anterior chamber inflammation and endothelial cell loss. Methods: In this retrospective cohort study, records of eyes that underwent femtosecond laser-assisted cataract surgery (FLACS) or conventional phacoemulsification (CP) were reviewed. The Victus femtosecond laser (Bausch and Lomb, Germany) was used to carry out corneal incisions, anterior capsulotomy, and lens fragmentation in FLACS procedures...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29564359/femtosecond-laser-assisted-astigmatic-keratotomy-a-review
#12
REVIEW
John S M Chang
Background: Astigmatic keratotomy (AK) remains an accessible means to correct surgically induced or naturally occurring astigmatism. The advantages of femtosecond laser-assisted astigmatic keratotomy (FSAK) over conventional methods have been recognized recently. Main text: This review evaluates the efficacy, complications, and different methods of FSAK for correction of astigmatism in native eyes and those that underwent previous penetrating keratoplasty (PKP)...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29564358/influence-of-overnight-orthokeratology-lens-fitting-decentration-on-corneal-topography-reshaping
#13
Jiaojie Chen, Wei Huang, Rong Zhu, Jun Jiang, Yiyu Li
Background: This retrospective study was designed to investigate the sole influence of orthokeratology (OK) lens fitting decentration on the Zernike coefficients of the reshaped anterior corneal surface. Methods: This study comprised a review of 106 right eyes and measurements of corneal topography both before OK and at 1-month follow-up visit. A routine was designed to calculate local corneal surface astigmatism and assist the determination of OK lens fitting decentration from pupil center...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29497624/scleral-surgery-for-the-treatment-of-presbyopia-where-are-we-today
#14
REVIEW
AnnMarie Hipsley, Brad Hall, Karolinne M Rocha
Presbyopia corrections traditionally have been approached with attempts to exchange power, either at the cornea or the lens planes, inducing multifocality, or altering asphericity to impact the optical system. Treatments that affect the visual axis, such as spectacle and contact lens correction, refractive surgeries, corneal onlays and inlays, and intraocular lenses are typically unable to restore true accommodation to the presbyopic eye. Their aim is instead to enhance 'pseudoaccommodation' by facilitating an extended depth-of-focus for which vision is sufficient...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29445760/corneal-functional-optical-zone-under-monocular-and-binocular-assessment
#15
Samuel Arba Mosquera, Diego de Ortueta, Shwetabh Verma
Background: In this retrospective randomized case series, we compared bilateral symmetry between OD and OS eyes, intercorneal differences and Functional Optical Zone (FOZ) of the corneal aberrations. Methods: Sixty-seven normal subjects (with no ocular pathology) who never had any ocular surgery were bilaterally evaluated at Augenzentrum Recklinghausen (Germany). In all cases, standard examinations and corneal wavefront topography (OPTIKON Scout) were performed...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29417088/the-art-of-nomograms
#16
Samuel Arba Mosquera, Diego de Ortueta, Shwetabh Verma
Background: To retrospectively analyse strategies for adjusting refractive surgery plans with reference to the preoperative manifest refraction. Methods: We constructed seven nomograms based on the refractive outcomes (sphere, cylinder, axis [SCA]) of 150 consecutive eyes treated with laser in situ keratomileusis for myopic astigmatism. We limited the initial data to the SCA of the manifest refraction. All nomograms were based on the strategy: if for x diopters (D) of attempted metric, y D is achieved; we can reverse this sentence and state for achieving y D of change in the metric, x D will be planned...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29417087/fundamentals-of-presbyopia-visual-processing-and-binocularity-in-its-transformation
#17
Olga I Rozanova, Andrey G Shchuko, Tatyana S Mischenko
Background: The accommodation has considerable interactions with the pupil response, vergence response and binocularity. The transformation of visual reception processing and the changes of the binocular cooperation during the presbyopia development are still poorly studied. So, the regularities of visual system violation in the presbyopia formation need to be characterized. This study aims to reveal the transformation of visual reception processing and to determine the role of disturbances in binocular interactions in presbyopia formation...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29238735/post-keratoplasty-astigmatism-management-by-relaxing-incisions-a-systematic-review
#18
REVIEW
Gaëlle Ho Wang Yin, Louis Hoffart
Postoperative visual acuity can be limited by post-keratoplasty astigmatism, even with a clear corneal graft. Astigmatism management can be performed by selective suture removal, adjustment of sutures, optical correction, photorefractive procedures, wedge resection, intra-ocular lens implantation, intracorneal ring segments, relaxing incisions with or without compression sutures and repeated keratoplasty. Relaxing incisions can be made in the graft, graft-host interface or host cornea. Despite the unpredictability of the method because the flat and steep meridians are usually not orthogonal after penetrating keratoplasty, with asymmetric power distribution, all the studies showed an overall reduction of refractive, keratometric or topographic astigmatism, ranging from 30% to 72% with manual or femtosecond-assisted techniques...
2017: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29234686/therapeutic-approaches-for-corneal-neovascularization
#19
REVIEW
Sepehr Feizi, Amir A Azari, Sharareh Safapour
Angiogenesis refers to new blood vessels that originate from pre-existing vascular structures. Corneal neovascularization which can lead to compromised visual acuity occurs in a wide variety of corneal pathologies. A large subset of measures has been advocated to prevent and/or treat corneal neovascularization with varying degrees of success. These approaches include topical corticosteroid administration, laser treatment, cautery, and fine needle diathermy. Since the imbalance between proangiogenic agents and antiangiogenic agents primarily mediate the process of corneal neovascularization, recent therapies are intended to disrupt the different steps in the synthesis and actions of proangiogenic factors...
2017: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29177182/glaucoma-surgery-and-induced-astigmatism-a-systematic-review
#20
REVIEW
Helen H L Chan, Yu Xiang G Kong
Background: The refractive outcomes of glaucoma surgeries, particularly their effect on astigmatism, are incompletely understood. Main body: Trabeculectomy is associated with a considerable amount of with-the-rule astigmatic change in the immediate postoperative period. This is followed by a gradual against-the-rule shift. These changes are altered with the use of mitomycin C (MMC). Non-penetrating surgery such as deep sclerectomy is also associated with a similar or smaller degree of induced astigmatism...
2017: Eye and Vision (London, England)
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