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Dysphotopsia

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https://www.readbyqxmd.com/read/29096997/comparison-of-new-visual-disturbances-after-superior-versus-nasal-temporal-laser-peripheral-iridotomy-a-prospective-randomized-trial
#1
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...
October 30, 2017: Ophthalmology
https://www.readbyqxmd.com/read/29084005/dysphotopsia-a-multifaceted-optic-phenomenon
#2
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...
October 27, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28967072/visual-outcomes-after-progressive-apodized-diffractive-intraocular-lens-implantation
#3
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
#4
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...
September 9, 2017: Vision Research
https://www.readbyqxmd.com/read/28837979/-causes-diagnosis-and-therapy-of-negative-dysphotopsia
#5
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. This may lead to a minimal shift of the object space corresponding the blind spot and the larger central vessels so they become visible for a short time after surgery...
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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...
June 29, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28574135/patient-centered-and-visual-quality-outcomes-of-premium-cataract-surgery-a-systematic-review
#12
REVIEW
Sophia Y Wang, Maxwell S Stem, Gale Oren, Roni Shtein, Paul R Lichter
PURPOSE: Over 8 million cataract surgeries are performed in the United States and the European Union annually, with many patients choosing to pay out of pocket for premium options including premium intraocular lens implants (IOLs) or laser-assisted cataract surgery (LACS). This report provides a systematic review evaluating patient-centered and visual quality outcomes comparing standard monofocal IOLs to premium cataract surgery options. METHODS: PubMed and EMBASE were searched for publications published between January 1, 1980, and September 18, 2016, on multifocal, accommodative, and toric IOLs, monovision, and LACS, which reported on 1) dysphotopsias, 2) contrast sensitivity, 3) spectacle independence, 4) vision-related quality of life or patient satisfaction, and 5) IOL exchange...
June 26, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28433446/functional-magnetic-resonance-imaging-to-assess-the-neurobehavioral-impact-of-dysphotopsia-with-multifocal-intraocular-lenses
#13
Andreia M Rosa, Ângela C Miranda, Miguel Patrício, Colm McAlinden, Fátima L Silva, Joaquim N Murta, Miguel Castelo-Branco
PURPOSE: To investigate the association between dysphotopsia and neural responses in visual and higher-level cortical regions in patients who recently received multifocal intraocular lens (IOL) implants. DESIGN: Cross-sectional study. PARTICIPANTS: Thirty patients 3 to 4 weeks after bilateral cataract surgery with diffractive IOL implantation and 15 age- and gender-matched control subjects. METHODS: Functional magnetic resonance imaging (fMRI) was performed when participants viewed low-contrast grating stimuli...
September 2017: Ophthalmology
https://www.readbyqxmd.com/read/28407161/preliminary-evidence-of-successful-near-vision-enhancement-with-a-new-technique-presbyopic-allogenic-refractive-lenticule-pearl-corneal-inlay-using-a-smile-lenticule
#14
Soosan Jacob, Dhivya Ashok Kumar, Amar Agarwal, Athiya Agarwal, Ramalingam Aravind, A I Saijimol
PURPOSE: To describe a new technique (PrEsbyopic Allogenic Refractive Lenticule [PEARL] inlay) using an allogenic corneal inlay prepared from a small incision lenticule extraction (SMILE) lenticule. METHODS: A SMILE lenticule of specified thickness (mean: 61.5 ± 3.32 µm) was trephined at the center to 1-mm diameter and implanted in the cornea on the coaxially sighted light reflex under a femtosecond laser-created cap of 120 µm in the nondominant eye of presbyopic patients...
April 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28366376/negative-dysphotopsia-causes-and-rationale-for-prevention-and-treatment
#15
Jack T Holladay, Michael J Simpson
PURPOSE: To determine the cause of negative dysphotopsia using standard ray-tracing techniques and identify the primary and secondary causative factors. SETTING: Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA. DESIGN: Experimental study. METHODS: Zemax ray-tracing software was used to evaluate pseudophakic and phakic eye models to show the location of retinal field images from various visual field objects...
February 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28007099/in-the-bag-nasal-intraocular-lens-optic-truncation-for-treatment-of-negative-dysphotopsia
#16
Neeti Meghnad Alapati, George J Harocopos, Arsham Sheybani
We describe in-the-bag nasal intraocular lens (IOL) optic truncation, a new technique for the treatment of negative dysphotopsia. After a plane is created between the nasal capsular bag and the IOL, micrograspers and intraocular scissors are used to amputate the nasal optic edge. The amputation is to reduce the optical impact of the IOL edge and nasal anterior capsule on the occurrence of negative dysphotopsia. The technique addresses many of the proposed mechanisms contributing to the development of negative dysphotopsia and can theoretically be used in all patients with chronic symptomatology...
December 2016: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/27956290/objective-evaluation-of-negative-dysphotopsia-with-goldmann-kinetic%C3%A2-perimetry
#17
Natalia Y Makhotkina, Tos T J M Berendschot, Rudy M M A Nuijts
PURPOSE: To compare the extension of peripheral visual fields in phakic and pseudophakic patients and to evaluate whether Goldmann kinetic perimetry can be used as an objective measure of negative dysphotopsia. SETTING: University Eye Clinic, Maastricht University Medical Centre, Maastricht, the Netherlands. DESIGN: Prospective and case-control study. METHODS: Kinetic perimetry was performed with V4e and I4e stimuli...
November 2016: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/27830188/introduction-of-a-toric-intraocular-lens-to-a-non-refractive-cataract-practice-challenges-and-outcomes
#18
Clare Kirwan, John M Nolan, Jim Stack, Ian Dooley, Johnny Moore, Tara Cb Moore, Stephen Beatty
AIM: To identify challenges inherent in introducing a toric intraocular lens (IOL) to a non-refractive cataract practice, and evaluate residual astigmatism achieved and its impact on patient satisfaction. METHODS: Following introduction of a toric IOL to a cataract practice with all procedures undertaken by a single, non-refractive, surgeon (SB), pre-operative, intra-operative and post-operative data was analysed. Attenuation of anticipated post-operative astigmatism was examined, and subjectively perceived visual functioning was assessed using validated questionnaires...
May 25, 2016: International Journal of Ophthalmology and Clinical Research
https://www.readbyqxmd.com/read/27678470/ring-shaped-dysphotopsia-associated-with-posterior-chamber-phakic-implantable-collamer-lenses-with-a-central-hole
#19
Youngsub Eom, Dae Wook Kim, Dongok Ryu, Jun-Heon Kim, Seul Ki Yang, Jong Suk Song, Sug-Whan Kim, Hyo Myung Kim
PURPOSE: To evaluate the incidence of central hole-induced ring-shaped dysphotopsia after posterior chamber phakic implantable collamer lens (ICL) with central hole (hole ICL) implantation and to investigate the causes of central hole-induced dysphotopsia. METHODS: The clinical study enrolled 29 eyes of 15 consecutive myopic patients implanted with hole ICL. The incidence of ring-shaped dysphotopsia after hole ICL implantation was evaluated. In the experimental simulation study, non-sequential ray tracing was used to construct myopic human eye models with hole ICL and ICL without a central hole (conventional ICL)...
May 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27341093/-the-effect-of-multifocal-toric-lens-rotation-on-visual-quality
#20
M Veselá, D Baráková, D Bujalková, D Garajová
PURPOSE: The aim of the study was evaluation and comparison of rotational stability and the effect of multifocal toric intraocular lens rotation (T-MIOL) at visual quality of two types of intraocular lens AcrySof IQ ReSTOR Toric SND1Tx (Alcon Laboratories, Inc.) and AT LISA toric 909M (Carl Zeiss Meditec AG). There was evaluated a pseudophakic dysphotopsia based on patients subjective feelings as well as the independence on glasses and overall satisfaction with the visual quality after T-MIOLs were implanted...
2016: Ceská a Slovenská Oftalmologie
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