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Dysphotopsia

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https://www.readbyqxmd.com/read/29685771/iris-characteristics-affecting-far-peripheral-vision-and-negative-dysphotopsia
#1
Michael J Simpson, Maria Muzyka-Woźniak
PURPOSE: To evaluate how the iris obstructs rays at large visual angles. SETTING: Simpson Optics, Arlington, Texas, USA, and Spektrum Eye Clinic, Wroclaw, Poland. DESIGN: Retrospective case study. METHODS: Anterior segment optical coherence tomography (AS-OCT) (Visante) images were exported for normal, short, and long eyes and eyes with negative dysphotopsia. Iris characteristics were manually identified, including the maximum iris thickness and its distance from the pupil, and the gap between the iris and intraocular lens (IOL)...
April 20, 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29651343/through-focus-vision-performance-and-light-disturbances-of-3-new-intraocular-lenses-for-presbyopia-correction
#2
Santiago Escandón-García, Filomena J Ribeiro, Colm McAlinden, António Queirós, José M González-Méijome
Purpose: To compare the through-focus visual performance in a clinical population of pseudophakic patients implanted with two new trifocal intraocular lenses (IOLs) and one extended depth of focus IOL. Methods: Prospective, nonrandomized, examiner-masked case series. Twenty-three patients received the FineVision® and seven patients received the PanOptix™ trifocal IOLs. Fifteen patients received the Symfony extended depth of focus IOL. Mean age of patients was 63 ± 8 years...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29587981/negative-dysphotopsia-and-dyschromatopsia-february-consultation-1
#3
Samuel Masket
No abstract text is available yet for this article.
February 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29587976/effect-of-supplementary-implantation-of-a-sulcus-fixated-intraocular-lens-in-patients-with-negative-dysphotopsia
#4
Natalia Y Makhotkina, Vincent Dugrain, Daniel Purchase, Tos T J M Berendschot, Rudy M M A Nuijts
PURPOSE: To evaluate whether the outcome of negative dysphotopsia treatment by implantation of a Sulcoflex intraocular lens (IOL) can be understood using individual biometry and optical modeling data. SETTING: University Eye Clinic, Maastricht University Medical Centre, Maastricht, the Netherlands. DESIGN: Retrospective case series. METHODS: Patients with negative dysphotopsia were treated with supplementary implantation of a sulcus-fixated IOL...
February 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29576438/light-disturbance-with-multifocal-contact-lens-and-monovision-for-presbyopia
#5
Paulo Fernandes, Ana Amorim-de-Sousa, António Queirós, Santiago Escandón-Garcia, Colm McAlinden, José Manuel González-Méijome
Dysphotopsia affects a significant number of patients, particularly after visual correction with multifocal optical designs. PURPOSE: Evaluate light distortion (LD) in two modalities of contact lens (CL) wear: multifocal (MF) and monofocal (MV). METHODS: This was a randomized, double-masked, crossover study involving 20 presbyopic patients. Patients were randomized first into either MF or MV for 15 days of use with a 1 week wash-out period between each lens type...
March 22, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29502619/surgical-management-of-negative-dysphotopsia
#6
Samuel Masket, Nicole R Fram, Andrew Cho, Isaac Park, Don Pham
PURPOSE: To evaluate curative and preventative surgical strategies for negative dysphotopsia. SETTING: Private practice, Los Angeles, California, USA. DESIGN: Retrospective case series. METHODS: Patients with self-reported chronic negative dysphotopsia had corrective surgery as the therapeutic group. Second eye surgery, in cases with negative dysphotopsia in the previously operated eye, comprised the preventative group...
January 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29482864/laser-peripheral-iridotomy-in-primary-angle-closure-a-report-by-the-american-academy-of-ophthalmology
#7
Sunita Radhakrishnan, Philip P Chen, Anna K Junk, Kouros Nouri-Mahdavi, Teresa C Chen
PURPOSE: To examine the efficacy and complications of laser peripheral iridotomy (LPI) in subjects with primary angle closure (PAC). METHODS: Literature searches in the PubMed and Cochrane databases were last conducted in August 2017 and yielded 300 unique citations. Of these, 36 met the inclusion criteria and were rated according to the strength of evidence; 6 articles were rated level I, 11 articles were rated level II, and 19 articles were rated level III. RESULTS: Reported outcomes were change in angle width, effect on intraocular pressure (IOP) control, disease progression, and complications...
February 23, 2018: Ophthalmology
https://www.readbyqxmd.com/read/29426456/management-of-positive-dysphotopsia-in-a-patient-with-prior-refractive-surgery
#8
Ayushi Chandramani, Kamran M Riaz
No abstract text is available yet for this article.
February 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/29208827/optimizing-optical-outcomes-of-intraocular-lens-implantation-by-achieving-centration-on-visual-axis
#9
Prakhyat Roop
In existing designs of intraocular lenses (IOLs), optical outcomes are compromised even after perfectly executed surgery. The reason for this is misalignment of optical axis of the eye and its visual axis. There is a need to design an IOL which compensates for this misalignment and hence enhances the optical outcomes of cataract surgery. The present innovation attempts to fulfill this unmet need and optimizes optical outcomes of all IOLs of different optical profiles - spherical, aspheric, toric, and multifocal...
December 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29096997/comparison-of-new-visual-disturbances-after-superior-versus-nasal-temporal-laser-peripheral-iridotomy-a-prospective-randomized-trial
#10
Kavitha Srinivasan, Nazlee Zebardast, Palaniswamy Krishnamurthy, Mohideen Abdul Kader, Ganesh V Raman, Sharmila Rajendrababu, Rengaraj Venkatesh, Pradeep Y Ramulu
PURPOSE: To determine whether laser peripheral iridotomy (LPI) location affects postoperative dysphotopsia symptoms. DESIGN: Multicenter, randomized, prospective, single-masked trial. PARTICIPANTS: Five hundred fifty-nine South Indian patients 30 years of age or older diagnosed as primary angle-closure suspects (PACSs) or with primary angle closure (PAC) or primary angle-closure glaucoma (PACG) in both eyes. METHODS: Patients were randomized to either bilateral superior or bilateral nasal/temporal LPI...
March 2018: Ophthalmology
https://www.readbyqxmd.com/read/29084005/dysphotopsia-a-multifaceted-optic-phenomenon
#11
REVIEW
Jenny Hu, Ruti Sella, Natalie A Afshari
PURPOSE OF REVIEW: To summarize the literature on dysphotopsia, focusing on strategies for management and prevention. RECENT FINDINGS: Clinical studies and ray-tracing diagrams have improved our understanding of the risk factors for positive and negative dysphotopsiae. Well known management and prevention strategies such as piggyback IOL, reverse optic capture, Nd:YAG capsulotomy, and IOL exchange are reviewed, as well as newer strategies such as the infertemporal approach to IOL implantation, 'in-the-bag nasal optic truncation' and new IOL design implantation, and new IOL design...
January 2018: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28967072/visual-outcomes-after-progressive-apodized-diffractive-intraocular-lens-implantation
#12
Javier García-Bella, Néstor Ventura-Abreu, Laura Morales-Fernández, Paula Talavero-González, Jesús Carballo-Álvarez, Juan Carlos Sanz-Fernández, José M Vázquez-Moliní, José M Martínez-de-la-Casa
PURPOSE: To assess photopic and mesopic vision in patients implanted with the Bi-Flex® M 677 MY bifocal intraocular lens (IOL). METHODS: In this prospective clinical study, 25 patients with cataract in both eyes were subjected to cataract surgery and bilateral implantation of the Bi-Flex® M 677MY (Medicontur, Hungary) IOL. Three months after surgery, high-contrast photopic uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA) were determined...
September 11, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28882754/mini-review-far-peripheral-vision
#13
Michael J Simpson
The region of far peripheral vision, beyond 60 degrees of visual angle, is important to the evaluation of peripheral dark shadows (negative dysphotopsia) seen by some intraocular lens (IOL) patients. Theoretical calculations show that the limited diameter of an IOL affects ray paths at large angles, leading to a dimming of the main image for small pupils, and to peripheral illumination by light bypassing the IOL for larger pupils. These effects are rarely bothersome, and cataract surgery is highly successful, but there is a need to improve the characterization of far peripheral vision, for both pseudophakic and phakic eyes...
November 2017: Vision Research
https://www.readbyqxmd.com/read/28837979/-causes-diagnosis-and-therapy-of-negative-dysphotopsia
#14
Martin Wenzel, Achim Langenbucher, Timo Eppig
Negative Dysphotopsia (ND) is a dark, sometimes rounded bar or shadow in the temporal visual field after uncomplicated cataract surgery that may lead to great patient discomfort. R. Olson called it "the number one troublesome complaint after uneventful cataract surgery". The origin of this phenomena remains uncertain and is discussed conversely in literature. We have found evidence that it may be caused by a slight difference in magnification caused by the new IOL compared to the old crystalline lens...
August 24, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28732606/visual-performance-after-bilateral-implantation-of-2-new-presbyopia-correcting-intraocular-lenses-trifocal-versus-extended-range-of-vision
#15
Gaspare Monaco, Mariangela Gari, Fabio Di Censo, Andrea Poscia, Giada Ruggi, Antonio Scialdone
PURPOSE: To compare the visual outcomes and quality of vision of 2 new diffractive multifocal intraocular lenses (IOLs) with those of a monofocal IOL. SETTING: Fatebenefratelli e Oftalmico Hospital, Milan, Italy. DESIGN: Prospective case series. METHODS: Patients had bilateral cataract surgery with implantation of a trifocal IOL (Panoptix), an extended-range-of-vision IOL (Symfony), or a monofocal IOL (SN60WF). Postoperative examinations included assessing distance, intermediate, and near visual acuity; binocular defocus; intraocular and total aberrations; point-spread function (PSF); modulation transfer function (MTF); retinal straylight; and quality-of-vision (QoV) and spectacle-dependence questionnaires...
June 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28731877/simple-preoperative-ink-test-as-a-novel-adjunct-to-intrastromal-keratopigmentation-for-post-laser-peripheral-iridotomy-dysphotopsias
#16
Stephan Ong Tone, Daniel Q Li, Zach Ashkenazy, Armand Borovik, Allan R Slomovic, David S Rootman, Clara C Chan
PURPOSE: To describe a simple preoperative ink test as a novel adjunct to intrastromal keratopigmentation for post-laser peripheral iridotomy (LPI) dysphotopsias. METHODS: A surgical marking pen is applied to the area over a peripheral iridotomy before intrastromal keratopigmentation. The patient can then assess whether there is any improvement in their symptoms of dysphotopsias. Manual intrastromal keratopigmentation can then be performed using a crescent blade into the clear cornea at 50% depth and tunneled centrally to create a pocket ensuring that the peripheral iridotomy is fully occluded...
October 2017: Cornea
https://www.readbyqxmd.com/read/28730093/a-systematic-review-of-pseudophakic-monovision-for-presbyopia-correction
#17
REVIEW
Georgios Labiris, Aspa Toli, Aslin Perente, Panagiota Ntonti, Vassilios P Kozobolis
A systematic review of the recent literature regarding pseudophakic monovision as a reliable methods for presbyopia correction was performed based on the PubMed, MEDLINE, Nature and the American Academy of Ophthalmology databases in July 2015 and data from 18 descriptive and 12 comparative studies were included in this narrative review. Pseudophakic monosvision seems to be an effective method for presbyopia with high rates of spectacles independence and minimal dysphotopsia side-effects, that should be considered by the modern cataract surgeons...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28726357/the-complexities-of-negative-dysphotopsia
#18
REVIEW
Ivayla I Geneva, Bonnie A Henderson
The appearance of a dark shadow in the temporal periphery, otherwise known as negative dysphotopsia, continues to be a problem for some patients after routine uncomplicated cataract surgery. Etiologies include type and design of intraocular lens (IOL), anatomical features and dimensions of the eye, pupil size, angle kappa, relationship of the optic to the anterior capsule, and the position of the optic/haptic junction of the IOL. Although the primary etiology remains controversial, it is clear that the cause is multifactorial...
July 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28674958/monovision-versus-multifocality-for-presbyopia-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#19
REVIEW
Lidija Kelava, Hrvoje Barić, Mladen Bušić, Ivan Čima, Vladimir Trkulja
INTRODUCTION: Refractive surgery in presbyopia tends to achieve spectacle independence with minimal optical disturbances. We compared monovision to multifocality procedures regarding these outcomes. METHODS: We conducted a systematic review of published (till November 21, 2016) randomized controlled trials (RCTs) comparing any monovision to any multifocality method or comparing different monovision/multifocality methods to each other that enabled direct or indirect comparisons between particular monovision and particular multifocality procedures in presbyopic patients undergoing cataract-related or unrelated surgery in respect to spectacle independence, unaided binocular visual acuity (VA), contrast sensitivity (CS), and adverse events...
August 2017: Advances in Therapy
https://www.readbyqxmd.com/read/28661569/effect-of-active-evaluation-on-the-detection-of-negative-dysphotopsia-after-sequential-cataract-surgery-discrepancy-between-incidences-of-unsolicited-and-solicited-complaints
#20
Natalia Y Makhotkina, Marjan D Nijkamp, Tos T J M Berendschot, Bart van den Borne, Rudy M M A Nuijts
PURPOSE: To evaluate the incidence of negative dysphotopsia after sequential cataract surgery. METHODS: Retrospective cohort study. The incidence of negative dysphotopsia was assessed by retrospective reviewing of medical records and interviews with patients between 2 and 4 months after sequential cataract surgery. Inclusion criteria were uncomplicated surgery, postoperative corrected distance visual acuity (CDVA) ≥20/25 Snellen and the absence of ocular comorbidity...
February 2018: Acta Ophthalmologica
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