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Eye and Vision (London, England)

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)
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)
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)
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)
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)
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)
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)
Jorge L Alió Del Barrio, Verónica Vargas, Olena Al-Shymali, Jorge L Alió
Small Incision Lenticule Extraction (SMILE) is a flap-free intrastromal technique for the correction of myopia and myopic astigmatism. To date, this technique lacks automated centration and cyclotorsion control, so several concerns have been raised regarding its capability to correct moderate or high levels of astigmatism. The objective of this paper is to review the reported SMILE outcomes for the correction of myopic astigmatism associated with a cylinder over 0.75 D, and its comparison with the outcomes reported with the excimer laser-based corneal refractive surgery techniques...
2017: Eye and Vision (London, England)
Rohit Shetty, Kalyani Deshpande, Chaitra Jayadev, Kareeshma Wadia, Pooja Mehta, Rushad Shroff, Harsha L Rao
[This corrects the article DOI: 10.1186/s40662-017-0070-1.].
2017: Eye and Vision (London, England)
Ivo Guber, Colm McAlinden, François Majo, Ciara Bergin
Background: Reaching a consensus on which parameters are most reliable at detecting progressive keratoconus patients with serial topography imaging is not evident. The aim of the study was to isolate the parameters best positioned to detect keratoconus progression using the Pentacam HR® measures based on the respective limits of repeatability and range of measurement. Method: Using the Pentacam HR®, a tolerance index was calculated on anterior segment parameters in healthy and keratoconic eyes...
2017: Eye and Vision (London, England)
Marilita M Moschos, Maria Dettoraki, Michael Tsatsos, George Kitsos, Christos Kalogeropoulos
BACKGROUND: Diabetic retinopathy is a major cause of visual impairment and blindness among working-age people worldwide. The aim of our study was to investigate the effects of a carotenoid supplementation on retinal thickness and macular function of patients with diabetes using optical coherence tomography (OCT) and multifocal electroretinography (mfERG). METHODS: A retrospective study of one hundred and twenty eyes of sixty patients age between 40 and 60 years with non-insulin dependent type 2 diabetes mellitus without diabetic retinopathy who underwent OCT and mfERG and took vitamin supplements for a period of two years...
2017: Eye and Vision (London, England)
Praveen K Malik, Taru Dewan, Arun Kr Patidar, Ekta Sain
BACKGROUND: To evaluate the effect of three different combinations of tip designs and infusion systems in torsional phacoemulsification (INFINITI and CENTURION) in patients with cataract. According to the manufacturer, two unique improvements in the Centurion are: active fluid dynamic management system and use of an intrepid balanced tip. The study specifically aimed to evaluate the beneficial effects, if any, of change in tip design and infusion system individually and in combination on both per-operative parameters as well as endothelial health over 6 months...
2017: Eye and Vision (London, England)
Jian-Guo Zhao, An-Peng Pan, Ke Zheng, A-Yong Yu
BACKGROUND: To construct a real-time computerized location system (RCLS) to analyze and display the axis of corneal astigmatism and to compare its accuracy with the Scheimpflug method. METHODS: Fifty-seven eyes of 39 volunteers with corneal astigmatism more than 1.00 diopter (D) were recruited. The RCLS was composed of a circular light-emitting diode (LED) light source, surgical microscope, surgical video system, computer and self-programming image analysis software...
2017: Eye and Vision (London, England)
Lin-Yan Zheng, Shuang-Qian Zhu, Yan-Feng Su, Hu-Yong Zou, Qin-Mei Wang, A-Yong Yu
BACKGROUND: To compare the outcomes of a toric phakic intraocular lens (PIOL) and a spherical PIOL combined with astigmatic keratotomy (AK) for the correction of high myopic astigmatism. METHODS: This study enrolled patients with high myopic astigmatism, including 30 eyes (22 patients) that received a toric PIOL implantation (TICL group), and 32 eyes (24 patients) that received combined AK and a spherical PIOL implantation (AK+ ICL group). The outcomes were compared between the two groups before surgery, and at the following time points after surgery: 1 week, 1, 3, 6 months, and 1, 2 years...
2017: Eye and Vision (London, England)
Jordan V Chervenkoff, Elizabeth Hawkes, Gabriela Ortiz, Deborah Horney, Mayank A Nanavaty
BACKGROUND: To investigate the effect of eye rubbing on keratometry (K), aberrometry, tear film break-up-time (TFBUT) and anterior chamber depth (ACD). METHODS: Volunteers without any corneal pathology or dry eyes were randomised to rubbing in one eye and the fellow-eye was control. Eye rubbing was performed for 2 min. Primary outcomes studied were anterior and posterior K changes. Secondary outcomes were changes in TFBUT, axial length (AL) & ACD, K changes in various zones, asphericity and aberrometry...
2017: Eye and Vision (London, England)
AnnMarie Hipsley, David Hui-Kang Ma, Chi-Chin Sun, Mitchell A Jackson, Daniel Goldberg, Brad Hall
BACKGROUND: To evaluate the effects on near and intermediate visual performance after bilateral Laser Anterior Ciliary Excision (LaserACE) procedure. METHODS: LaserACE surgery was performed using the VisioLite 2.94 μm erbium: yttrium-aluminum-garnet (Er:YAG) ophthalmic laser system in 4 oblique quadrants on the sclera over the ciliary muscle in 3 critical zones of physiological importance (over the ciliary muscles and posterior zonules) with the aim to improve natural dynamic accommodative forces...
2017: Eye and Vision (London, England)
Carl Sjoholm-Gomez de Liano, Vidal F Soberon-Ventura, Guillermo Salcedo-Villanueva, Abril Santos-Palacios, Jose Luis Guerrero-Naranjo, Jans Fromow-Guerra, Gerardo García-Aguirre, Virgilio Morales-Canton, Raul Velez-Montoya
BACKGROUND: To assess the sensitivity, specificity, positive predictive value and negative predictive value of anterior chamber tap for the diagnosis of bacterial endophthalmitis on a population with high prevalence. METHODS: Retrospective, single centre, case series study. We reviewed all medical records with clinical diagnosis of bacterial endophthalmitis in our hospital from January 1st, 2000 to December 31st 2014. From each record, we documented general demographic data, best corrected visual acuity and vitreous and aqueous tap microbiological results...
2017: Eye and Vision (London, England)
Aihua Hou, Min Qi Tin, Louis Tong
BACKGROUND: Gram-positive bacteria stimulate Toll-like receptor (TLR) 2 and then activate the pro-inflammatory nuclear factor-kappa B (NF-κB) pathway. As the human ocular surface is heavily colonised by gram-positive cocci bacteria, a balance of activation/repression of NF-κB target genes is essential to avoid uncontrolled infection or autoimmune-related inflammation. It is advantageous to test NF-κB targeting molecules in an ocular surface culture system that allows assessment of temporal NF-κB activation in a longitudinal fashion without destruction of cells...
2017: Eye and Vision (London, England)
Jorge L Alió, Jorge L Alió Del Barrio, Alfredo Vega-Estrada
Presbyopia still remains the last frontier of refractive surgery. Its surgical management is under constant evolution due to the limitations that exist today with respect to its management, which is probably in relation with the multifactorial basis in which presbyopia is clinically developed in the human. Until currently, virtually all surgical techniques that have been proposed for its correction are based on the induction of pseudoaccommodation in the presbyopic eye, including multifocality. However, the real restoration of accommodation is more complex, and it has been tried by the use of different, so called, "accommodative" pseudophakic intraocular lenses (AIOL)...
2017: Eye and Vision (London, England)
Myrsini Petrelli, Konstantinos Oikonomakis, Konstantinos Andreanos, Andreas Mouchtouris, Ilias Georgalas, George Kymionis
BACKGROUND: To report a surgical method for treating corneal oedema in a case of late-onset Descemet membrane detachment after penetrating keratoplasty. CASE PRESENTATION: A 55-year old patient presented with sudden visual loss in his left eye 28 years after penetrating keratoplasty for keratoconus. Slit-lamp biomicroscopy revealed a distortion of the corneal graft anatomy with protrusion of the graft and peripheral thinning and steepening in the residual host tissue, accompanied by corneal graft oedema...
2017: Eye and Vision (London, England)
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