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Scleral lens

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https://www.readbyqxmd.com/read/28426745/objective-classification-of-zonular-weakness-based-on-lens-movement-at-the-start-of-capsulorhexis
#1
Saori Yaguchi, Shigeo Yaguchi, Yukari Yagi-Yaguchi, Tadahiko Kozawa, Hiroko Bissen-Miyajima
PURPOSE: To quantify zonular weakness based on lens movement at the start of continuous curvilinear capsulorhexis (CCC) and establish a classification system for it. SETTING: Kozawa Eye Hospital and Diabetes Center, Mito, Japan. DESIGN: Retrospective interventional case series. METHODS: We examined 402 consecutive eyes of 316 patients who underwent CCC, phacoemulsification and aspiration (PEA), and intraocular lens (IOL) implantation...
2017: PloS One
https://www.readbyqxmd.com/read/28410710/supracapsular-glued-intraocular-lens-in%C3%A2-progressive-subluxated-cataracts-technique-to-retain-an-intact-vitreous-face
#2
Soosan Jacob, Smita Narasimhan, Amar Agarwal, Cosimo Mazzotta, Miguel Rechichi, Athiya Agarwal
We describe a technique to prevent late intraocular lens (IOL) subluxation and dislocation that can be associated with progressive zonulopathy. Supracapsular glued IOL fixation is done to retain an intact anterior hyaloid face and avoid vitreous disturbance while providing stable long-term IOL fixation. Phacoemulsification is followed by glued IOL implantation above intact anterior and posterior capsules. Sclerotomies are created ab interno in a supracapsular plane under diametrically opposite lamellar scleral flaps without entering the vitreous cavity...
March 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28407114/establishment-of-detailed-eye-model-of-adult-chinese-male-and-dose-conversion-coefficients-calculation-under-neutron-exposure
#3
Hongyu Zhu, Rui Qiu, Zhen Wu, Li Ren, Chunyan Li, Hui Zhang, Junli Li
The human eye lens is sensitive to radiation. ICRP-118 publication recommended a reduction of the occupational annual equivalent dose limit from 150 to 20 mSv, averaged over defined periods of 5 y. Therefore, it is very important to build a detailed eye model for the accurate dose assessment and radiation risk evaluation of eye lens. In this work, a detailed eye model was build based on the characteristic anatomic parameters of the Chinese adult male. This eye model includes seven main structures, which are scleral, choroid, lens, iris, cornea, vitreous body and aqueous humor...
April 12, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28394876/scleral-lens-prescription-and-management-practices-the-scope-study
#4
Jennifer Harthan, Cherie B Nau, Joseph Barr, Amy Nau, Ellen Shorter, Nicolette T Chimato, David O Hodge, Muriel M Schornack
OBJECTIVES: To assess current scleral lens prescription and management practices by conducting an international online survey of eye care providers. METHODS: The SCOPE (Scleral Lenses in Current Ophthalmic Practice: an Evaluation) study group designed and administered an online survey regarding current scleral lens prescription and management practices. The survey was open from January 15 to March 31, 2015, and generated 723 responses from individuals who had fit at least 5 patients with scleral lenses...
April 6, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28385302/subclassification-of-primary-angle-closure-using-anterior-segment-optical-coherence-tomography-and-ultrasound-biomicroscopic-parameters
#5
Junki Kwon, Kyung Rim Sung, Seungbong Han, Ye Ji Moon, Joong Won Shin
PURPOSE: To classify eyes with primary angle closure (PAC) in terms of the features visualized using anterior segment optical coherence tomography (AS-OCT) and ultrasound biomicroscopy (UBM). DESIGN: Retrospective, observational study. PARTICIPANTS: A total of 73 eyes of 73 patients with PAC. METHODS: Participants' eyes that had undergone laser peripheral iridotomy (LPI) were imaged using AS-OCT and UBM under the same lighting conditions...
April 3, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28380096/visual-rehabilitation-using-mini-scleral-contact-lenses-after-penetrating-keratoplasty
#6
Guilherme Andrade do Nascimento Rocha, Patrícia Oliveira Braga Miziara, Ana Clara Vieira de Castro, Arthur Andrade do Nascimento Rocha
Purpose: To report the visual rehabilitation outcomes and complications of patients fitted with mini-scleral rigid gas-permeable (RGP) contact lenses (mini-SCLs) after penetrating keratoplasty. Methods: We retrospectively reviewed 27 eyes (21 patients) that were fitted with mini-SCLs between October 2013 and December 2014. We analyzed demographic data, previous corneal disorders, visual outcomes, interval from keratoplasty to contact lens fitting, topographic and specular microscope data, fitted contact lens parameters, and complications...
January 2017: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/28376729/iris-reconstruction-using-autologous-iris-preserved-in-cold-balanced-salt-solution-for-8-hours-in-iatrogenic-total-iridodialysis-during-cataract-surgery-a-case-report
#7
Seung Pil Bang, Jong Hwa Jun
BACKGROUND: A large iris defect or extensive iridodialysis can be an intractable cause of visual disturbance, photophobia, glare, monocular diplopia, or cosmetic deformity. The implantation of an artificial iris substitute could be an effective option, but this can cause a reduction in endothelial cell density. We succeeded in the anatomical restoration of iris tissue that was totally dialyzed out of the eye, and was preserved in cold balanced salt solution for 8 h. Engrafted iris tissue was maintained within the aqueous humor...
April 4, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28370269/eye-ontogeny-in-pleurodema-bufoninum-a-comparison-with-pleurodema-somuncurense-anura-leptodactylidae
#8
Clara Volonteri, Diego A Barrasso, Leonardo Cotichelli, Néstor G Basso, Gladys N Hermida
Vision is one of the main sensory systems in amphibians, and the eye structure is highly associated with habitat conditions. The ontogeny, as well as the adult structure, of the eye has been studied in only a few species. The life change after metamorphosis is accompanied by changes in the visual environment. The aim of this work is to describe the eye ontogeny of Pleurodema bufoninum and to compare it with that of Pleurodema somuncurense. Specimens of both Pleurodema species were processed for histology analysis at different stages of development, including the tadpole, postmetamorphic, and adult forms...
April 2, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28366677/change-in-vault-during-scleral-lens-trials-assessed-with-anterior-segment-optical-coherence-tomography
#9
Varsha M Rathi, Preeji S Mandathara, Srikanth Dumpati, Virender S Sangwan
PURPOSE: To assess the change in vault during scleral lens fitting with anterior segment optical coherence tomography (AS-OCT). METHODS: This study comprised of patients who had AS-OCT performed after 1h and 4h of scleral lens wear (PROSE, prosthetic replacement of the ocular surface ecosystem, Boston Foundation for Sight, Needham Heights, MA, USA). Vault was measured on AS-OCT as the distance between the front surface of the cornea in the center and the back surface of the scleral lens...
March 30, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28366361/modified-technique-for-intrascleral-fixation-of-posterior-chamber-intraocular-lens-without-scleral-flaps
#10
Yu Zhang, Fanglin He, Jing Jiang, Qingjian Li, Zhiliang Wang
We present a modified technique for intrascleral fixation of a posterior chamber intraocular lens (IOL) without scleral flaps and assess its long-term safety and efficacy. The haptics of the IOL are externalized with a 23-gauge forceps and fixated in a scleral tunnel. Two clockwise scleral incisions are made using a 23-gauge needle at an angle 30 degrees above the sclera. A 3-piece IOL is inserted into the anterior chamber with an injector through the cornea incision, and the trailing haptic is kept outside to prevent the IOL from falling into the vitreous cavity...
February 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28356143/reverse-pupillary-block-after-implantation-of-a-scleral-sutured-posterior-chamber-intraocular-lens-a-retrospective-open-study
#11
Seung Pil Bang, Choun-Ki Joo, Jong Hwa Jun
BACKGROUND: To report the clinical features of patients with reverse pupillary block (RPB) after scleral-sutured posterior chamber intraocular lens (PC IOL) implantation and biometric changes after laser peripheral iridotomy (LPI). METHODS: Eight patients attending our hospital's ophthalmology outpatient clinic, who developed RPB after implantation of a scleral-sutured PC IOL due to subluxation of the crystalline lens or IOL, were investigated in this retrospective, observational study...
March 29, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28345572/late-dislocation-of-in-the-bag-intraocular-lenses-in-uveitic-eyes-an-analysis-of-management-and-complications
#12
Sudha K Ganesh, Parveen Sen, Hitesh R Sharma
AIM: An analysis of late in-the-bag dislocation of intraocular lenses (IOL), in uveitic eyes. SETTING: Referral uveitis clinic. DESIGN: Retrospective case series. MATERIALS AND METHODS: All case records of eyes with chronic uveitis that had phacoemulsification with IOL implantation, at a referral uveitis clinic between February 1997 and January 2015 were retrieved and analyzed. Only those eyes with no documented intraoperative complication and no predisposing risks to IOL dislocation, such as pseudoexfoliation, high myopia, trauma, and prior VR surgery were included in this study...
February 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28341243/variation-of-clearance-considering-viscosity-of-the-solution-used-in-the-reservoir-and-following-scleral-lens-wear-over-time
#13
Claudine Courey, Langis Michaud
PURPOSE: This study aims to evaluate the settling of a scleral lens and if this process is influenced by the nature of the fluid layer. METHODS: A prospective, non-randomized control study was performed using an 18mm scleral lens. They were fitted with a central clearance of 400 um at insertion. One eye was randomly assigned to be fitted with a non-preserved gel solution of carboxymethylcellulose, while the other was inserted with non-preserved saline. Measurements of clearance in 3 locations were taken (OCT) at baseline, every 30min up to 1h30 post insertion and every 2h thereafter up to 6h00 of wear...
March 21, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28336224/surface-coverage-with-single-vs-multiple-gaze-surface-topography-to-fit-scleral-lenses
#14
Gregory DeNaeyer, Donald R Sanders, Timothy S Farajian
OBJECTIVES: To determine surface coverage of measurements using the sMap3D(®) corneo-scleral topographer in patients presenting for scleral lens fitting. METHODS: Twenty-five eyes of 23 scleral lens patients were examined. Up-gaze, straight-gaze, and down-gaze positions of each eye were "stitched" into a single map. The percentage surface coverage between 10mm and 20mm diameter circles from corneal center was compared between the straight-gaze and stitched images...
March 20, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28336221/the-use-of-contact-lens-telescopic-systems-in-low-vision-rehabilitation
#15
REVIEW
Stephen J Vincent
Refracting telescopes are afocal compound optical systems consisting of two lenses that produce an apparent magnification of the retinal image. They are routinely used in visual rehabilitation in the form of monocular or binocular hand held low vision aids, and head or spectacle-mounted devices to improve distance visual acuity, and with slight modifications, to enhance acuity for near and intermediate tasks. Since the advent of ground glass haptic lenses in the 1930's, contact lenses have been employed as a useful refracting element of telescopic systems; primarily as a mobile ocular lens (the eyepiece), that moves with the eye...
March 20, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28328725/region-specific-changes-in-postlens-fluid-reservoir-depth-beneath-small-diameter-scleral-lenses-over-2-hours
#16
Cherie B Nau, Muriel M Schornack
OBJECTIVES: Scleral lenses settle on the eye with time, and the depth of the postlens fluid reservoir decreases. We measured changes in central, superior, inferior, temporal, and nasal clearance beneath a small-diameter scleral lens after 2 hr of lens wear in healthy eyes. METHODS: Thirty-one participants (age, mean±SD, 29±7 years) with no history of eye disease or scleral lens wear were fitted with a 15-mm scleral lens in 1 eye. Scheimpflug images were acquired by a camera system within 5 min of lens placement and again after 2 hr of continuous lens wear...
March 21, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28298707/outcome-of-primary-rhegmatogenous-retinal-detachment-surgery-in-a-tertiary-referral-centre-in-northern-ireland-a-regional-study
#17
Michael A Mikhail, George Mangioris, Giuseepe Casalino, Stuart McGimpsey, James Sharkey, Richard Best, Wing C Chan
PURPOSE: To report the primary and final success, functional outcome and complication rates of patients with primary rhegmatogenous retinal detachment (RRD) who underwent retinal detachment surgery in a tertiary referral centre in Northern Ireland. VENUE: Vitreoretinal service, Royal Victoria Hospital, Belfast, Northern Ireland. METHODS: This is a retrospective case series of all patients who underwent primary RRD repair between 1st of January 2013 and 31st of December 2013...
January 2017: Ulster Medical Journal
https://www.readbyqxmd.com/read/28295635/quality-of-life-and-handling-experience-with-the-prose-device-an-indian-scenario
#18
Pradipta Bhattacharya, Rajeswari Mahadevan
BACKGROUND: PROSE (prosthetic replacement of ocular surface ecosystem) device is a custom-designed, corneal vaulting scleral contact lens, which is used in the treatment of irregular corneal conditions to improve vision and comfort. The present study aimed at assessing the success of the PROSE device in an Indian scenario in terms of change in quality of life and to understand the handling issues related to the device use. METHODS: Thirty-two subjects with various irregular corneal conditions meeting the inclusion criteria were included in the study...
March 12, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28271229/characteristics-of-patients-with-spontaneous-dislocation-of-in-the-bag-intraocular-lens-after-pars-plana-vitrectomy
#19
Takayuki Koike, Takayuki Baba, Tomohiro Nizawa, Toshiyuki Oshitari, Shuichi Yamamoto
PURPOSE: To determine the characteristics of eyes with late in-the-bag dislocation of an intraocular lens (IOL) after pars plana vitrectomy (PPV). METHODS: Fourteen eyes of 14 patients with a dislocated IOL after PPV were studied retrospectively. The data collected from the medical charts included the age, sex, history of eye diseases, axial length, and interval from PPV to time of IOL dislocation. The surgical procedures used during the PPV were also recorded. RESULTS: Seven eyes had undergone PPV for rhegmatogenous retinal detachment; 6 eyes, for proliferative diabetic retinopathy; and 1 eye, for retinal vein occlusion...
March 7, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28268323/design-simulation-and-evaluation-of-uniform-magnetic-field-systems-for-head-free-eye-movement-recordings-with-scleral-search-coils
#20
Karin Eibenberger, Bernhard Eibenberger, Michele Rucci
The precise measurement of eye movements is important for investigating vision, oculomotor control and vestibular function. The magnetic scleral search coil technique is one of the most precise measurement techniques for recording eye movements with very high spatial (≈ 1 arcmin) and temporal (>kHz) resolution. The technique is based on measuring voltage induced in a search coil through a large magnetic field. This search coil is embedded in a contact lens worn by a human subject. The measured voltage is in direct relationship to the orientation of the eye in space...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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