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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)
T Yu Verzhanskaya, E P Tarutta
The rational for the study was the high prevalence of myopia in the world. According to the World Health Organization (WHO), myopia is one of the five leading causes of blindness and low vision. Of recent reports on conservative measures for the stabilization of myopia, two areas of investigation deserve attention: methods of optical correction that affect peripheral refraction, orthokeratology lenses (OKL) in particular, and pharmacotherapy. The aim of the study was to evaluate the effectiveness and safety of myopia control in pediatric patients by combining two methods - OKL wearing and instillation of extra low doses of atropine (0...
2017: Vestnik Oftalmologii
Bojan Pajic, Horace Massa, Erika N Eskina
Today there are different options for correcting presbyopia by corneal laser procedure, but all of them have their benefits and compromises. The Monovision is a pseudoaccommodation procedure which works with an anisometropy of up to 2 D. The smaller the anisometropy is the faster a neuroadaptation will be achieved. There could be a decrease of binocularity. The monovision is not well supported by all patients, thus it is important to simulate this correction by contact lenses before surgery. The PresbyLASIK is a corneal multifocal solution for presbyopia correction for emmetropic, myopic and hyperopic eyes...
September 20, 2017: Klinische Monatsblätter Für Augenheilkunde
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)
Roberto Bellucci, Maria C Curatolo
PURPOSE: To describe a new extended depth of focus intraocular lens (IOL) design offering multifocality by the variation of spherical aberration in the central optical zone. METHODS: The new IOL (Mini WELL; SIFI, Catania, Italy) is an aspheric IOL with positive spherical aberration in the central 2-mm zone and negative spherical aberration in the pericentral 1-mm annulus, the amount of which was determined by specific optic calculation. The new IOL design was tested at the optical bench to investigate depth of focus and sensitivity to tilt, decentration, and angle Kappa...
June 1, 2017: Journal of Refractive Surgery
V V Neroev, E P Tarutta, S G Arutyunyan, A T Khandzhyan, N V Khodzhabekyan
AIM: to comparatively investigate accommodation, pseudoaccommodation, and higher-order aberrations in children and young adults with myopia and hyperopia. MATERIAL AND METHODS: A total of 39 myopic (the mean error of (-)5.2±1.5 diopters) and 53 hyperopic (the mean error of (+)3.1±1.15 diopters) eyes of 46 patients aged 5-20 years (11.6±0.6 years on average) were enrolled. Examination included evaluation of the objective accommodative response, relative accommodation reserves, pseudoaccommodation volume (calculated as the difference between the (+)3...
2017: Vestnik Oftalmologii
G V Voronin, V R Mamikonyan, V M Sheludchenko, M N Narbut
AIM: to assess visual functions and ergonomics after bilateral versus unilateral implantation of Lentis Comfort LS-313 MF15 multifocal intraocular lenses (MIOL) in aphakic eyes. MATERIAL AND METHODS: A total of 20 patients with М LENTIS LS-313 MF15 MIOLs were followed up. Group 1 consisted of 12 patients after bilateral symmetric implantation, group 2 - of 8 patients after unilateral procedure. The following parameters were examined: uncorrected binocular visual acuity at far, near, and intermediate distances under photopic and mesopic conditions, the range of pseudoaccommodation, spatial contrast sensitivity to achromatic sinusoidal gratings, lens stability with account to its optical design, and patient satisfaction with the resultant vision...
2017: Vestnik Oftalmologii
Xinjie Mao, James T Banta, Bilian Ke, Hong Jiang, Jichang He, Che Liu, Jianhua Wang
PURPOSE: To assess wavefront derived refraction and full eye biometry including ciliary muscle dimension and full eye axial geometry in pseudophakic eyes using spectral domain OCT equipped with a Shack-Hartmann wavefront sensor. METHODS: Twenty-eight adult subjects (32 pseudophakic eyes) having recently undergone cataract surgery were enrolled in this study. A custom system combining two optical coherence tomography systems with a Shack-Hartmann wavefront sensor was constructed to image and monitor changes in whole eye biometry, the ciliary muscle and ocular aberration in the pseudophakic eye...
2016: PloS One
Samuel Arba Mosquera, Jorge L Alió
PURPOSE: The aim of this systematic review was to synthesize and appraise the evidence of the benefits of presbyopic correction on the cornea for visual function. SUMMARY: Comprehensive search was conducted in MEDLINE using keywords like "presbylasik", "presbyopic refractive surgery", "corneal pseudoaccommodation" and "corneal multifocality". We reviewed corrected and uncorrected visual acuities for distance and near (uncorrected distance visual acuity (UDVA), uncorrected near visual acuity (UNVA), corrected distance visual acuity (CDVA), distance corrected near visual acuity (DCNVA), corrected near visual acuity (CNVA)), along with the refractive outcomes in spherical equivalent (SE) and astigmatism comparing the differences observed between preoperative myopic and hyperopic patients, as well as among techniques...
2014: Eye and Vision (London, England)
Edward Khawam, Bachir Abiad, Alaa Boughannam, Joanna Saade, Ramzi Alameddine
Great discrepancies are often encountered between the distance fixation and the near-fixation esodeviations and exodeviations. They are all attributed to either anomalies of the AC/A ratio or anomalies of the fusional convergence or divergence amplitudes. We report a case with pseudoconvergence insufficiency and another one with pseudoaccommodative convergence excess. In both cases, conv./div. excess and insufficiency were erroneously attributed to anomalies of the AC/A ratio or to anomalies of the fusional amplitudes...
2015: Case Reports in Ophthalmological Medicine
F T A Kretz, M A S Attia, K Linz, G U Auffarth
PURPOSE: The aim of this study was to make an evaluation of the pseudoaccommodation span and clinical results after implantation of a diffractive, apodised and trifocal multifocal intraocular lens (MIOL). METHODS: In a prospective, single-centre study 28 eyes of 14 patients were evaluated after in the bag implantation of the Micro-F MIOL (PhysIOL, Belgium) during routine microsurgical cataract surgery. Two to four months postoperatively the final examinations were performed...
August 2015: Klinische Monatsblätter Für Augenheilkunde
Béatrice Cochener, Jérome Vryghem, Pascal Rozot, Gilles Lesieur, Jean-Paul Chevalier, Jean-Marie Henry, Thierry David, Laurence Lesueur, Damien Gatinel, Cati Ganem, Johan Blanckaert, Emmanuel Van Acker, Steven Heireman, Sofie Ghekiere
PURPOSE: To evaluate the clinical results and safety obtained with a new type of multifocal intraocular lens (IOL) using a trifocal design to achieve pseudoaccommodation. METHODS: A pilot observational study of patients with a trifocal IOL (FineVision; PhysIOL, Liege, Belgium) implanted by 1 of 12 surgeons between March and December 2010. Visual outcomes that were assessed postoperatively included uncorrected and corrected distance, intermediate, and near visual acuity...
November 2014: Journal of Refractive Surgery
Gonzalo Muñoz, César Albarrán-Diego, Lurdes Belda, Stephanie Rohrweck
PURPOSE: To compare the clinical outcomes of add-on sulcus-based multifocal and standard in-the-bag multifocal intraocular lens (IOL) implantation. METHODS: Twenty-one patients with unilateral monofocal pseudophakia underwent add-on sulcus-based Acri. LISA 536D multifocal IOL (Carl Zeiss Meditec, Jena, Germany) implantation (add-on multifocal IOL group) and contralateral phacoemulsification with in-the-bag Acri.LISA 376D multifocal IOL (Carl Zeiss Meditec) implantation (primary multifocal IOL group)...
May 2014: Journal of Refractive Surgery
Boris Malyugin, Tatiana Morozova, Valentin Cherednik
PURPOSE: To present the theoretical optical background and clinical results of a new multifocal intraocular lens (MIOL) concept-gradient refractive index optics (Gradiol). PATIENTS AND METHODS: Original mathematical modeling software was used to calculate optimal construction of the MIOL optic constructed from two polymer materials with different refractive indices. Gradiol lenses were manufactured from hydrophobic acrylic utilizing original step-by-step polymerization technology with the final power difference of of 3...
January 2014: Middle East African Journal of Ophthalmology
Pablo Pérez-Merino, Judith Birkenfeld, Carlos Dorronsoro, Sergio Ortiz, Sonia Durán, Ignacio Jiménez-Alfaro, Susana Marcos
PURPOSE: To evaluate the objective accommodative response, change of aberrations, and depth of focus in eyes implanted with the Crystalens accommodative intraocular lens (IOL) at different accommodative demands. DESIGN: Prospective, observational study. METHODS: Eleven cataract patients (22 eyes) who underwent implantation of a Crystalens accommodative IOL, and control groups of 9 normal subjects (17 eyes) and 17 pseudophakic patients (17 eyes) implanted with monofocal IOLs were evaluated...
May 2014: American Journal of Ophthalmology
Hun Lee, Kwanghyun Lee, Ji Min Ahn, Eung Kweon Kim, Bradford Sgrignoli, Tae-Im Kim
PURPOSE: To compare the optical quality measurements obtained from the double-pass system and ocular aberrations, subjective visual acuity, and contrast sensitivity score in pseudophakic eyes. METHODS: Three months after cataract surgery, modulation transfer function (MTF) cutoff frequency, Strehl ratio, objective scatter index, and objective pseudoaccommodation obtained from the double-pass system were compared with total aberration, higher-order aberration, and spherical aberration obtained from ray-tracing aberrometer...
April 2014: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Nian Tan, Dengyi Zheng, Jian Ye
PURPOSE: To compare the performance of accommodative, multifocal, and monofocal intraocular lenses (IOLs). METHODS: In this clinical control study, 3 types of IOL were implanted in 128 eyes of 86 patients with age-related cataract who underwent phacoemulsification. Accommodative (Tetraflex), multifocal (ZMA00), and monofocal (Akreos Advanced Optics [AO]) IOLs were implanted into 43, 40, and 45 eyes, respectively. The uncorrected, best-corrected distance, contrast sensitivity, and distance-corrected intermediate and near visual acuity (UCDVA, BCDVA, CSVA, DCIVA, and DCNVA, respectively), amplitude of pseudoaccommodation, and patient satisfaction were measured at 1, 3, and 12 months after surgery...
September 2014: European Journal of Ophthalmology
Tomo Nishi, Futoshi Taketani, Tetsuo Ueda, Nahoko Ogata
PURPOSE: To determine the amplitude of pseudoaccommodation and higher-order aberrations with three types of implanted monofocal intraocular lenses (IOLs): aspheric yellow (IQ); spheric yellow (NT); and spheric clear (AT). SETTING: Department of Ophthalmology, Nara Medical University, Nara, Japan. METHODS: We studied 60 patients who underwent small incision phacoemulsification with the implantation of a monofocal IQ, NT, or AT IOL. The pseudoaccommodation was measured by the lens-loading method, and the postoperative ocular higher-order aberrations were measured with a Hartmann-Shack wavefront analyzer through natural and 4 mm pupils...
2013: Clinical Ophthalmology
Colm McAlinden, Eirini Skiadaresi, Damien Gatinel, Florence Cabot, Jinhai Huang, Konrad Pesudovs
PURPOSE: The purpose of this study is to evaluate the interchangeability of the three subscales of the Quality of Vision (QoV) questionnaire: Frequency, Severity and Bothersome. This will indicate if any of the subscales are predictive of one another and whether respondents need to complete all three subscales. METHODS: Data from four studies were pooled together, totaling 1930 completed questionnaires. Patient groups consisted of spectacle wearers, contact lens wearers, post-laser refractive surgery (including laser in situ keratomileusis, laser-assisted subepithelial keratectomy, and photorefractive keratectomy surgeries for various refractive errors), patients with cataract, and patients having undergone lens implantation surgery (consisting of monofocal, multifocal, and pseudoaccommodative intraocular lenses)...
August 2013: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Kazuhiro Watanabe, Kazuno Negishi, Murat Dogru, Takefumi Yamaguchi, Hidemasa Torii, Kazuo Tsubota
PURPOSE: To study the effect of pupil size on the relationship between refractive astigmatism and uncorrected distance visual acuity (UDVA) and pseudoaccommodation in pseudophakic eyes. METHODS: Thirty-six eyes from 36 patients who underwent phacoemulsification and intraocular lens (IOL) implantation were included. All eyes were divided into two groups based on the presence of postoperative-with-the-rule astigmatism or against-the-rule astigmatism. Uncorrected and corrected distance visual acuity (CDVA), refractive astigmatism, subjective accommodation amplitude, and pupil sizes under photopic and mesopic conditions were measured 1 month postoperatively...
January 2013: Journal of Refractive Surgery
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