Negative dysphotopsia

Background: Negative dysphotopsias (ND) are visual aberrations associated with in-the-bag optic intraocular lens (IOL) placement, causing arc-shaped or linear shadows. Reverse optic capture (ROC) is employed to prevent ND, yet it poses the risk of posterior capsular opacification (PCO) which usually develops within 2-5 years post-surgery due to the lens epithelial cells (LECs) proliferation and migration onto the posterior capsule. This can lead to a cloudy or hazy appearance in the visual field. Early identification of posterior capsular opacities is crucial to ensure timely intervention and minimize visual impairment...

Negative dysphotopsia (ND) refers to the subjective perception of an arc-shaped darkness or shadow in the temporal field of vision. This condition occurs after uneventful cataract surgery with an in-the-bag intraocular lens (IOL). To address this issue, supplementary implantation of conventional three-piece IOLs in the sulcus or dedicated supplementary Rayner Sulcoflex® IOL have been used successfully. The aim of this retrospective case series was to assess the effectiveness of resolving ND using a supplementary 1stQ AddOn® (Medicontur) IOL...

PURPOSE: To evaluate efficacy and safety of Negative Dysphotopsia(ND) Ring ( CareGroup SS ) implantation for treating and preventing ND. SETTING: Multicentric Tertiary Eye Hospitals. STUDY DESIGN: Prospective Interventional Cohort study. METHOD: 22 patients with ND were enrolled. Eyes with other ocular structural pathologies (corneal, macular, optic nerve head, retinal, neuro-ophthalmological) were excluded. In 15 eyes, the ring was implanted to treat ND (Therapeutic group ) and in 7 eyes it was implanted during cataract surgery of the fellow eye as a prophylactic measure ( Prophylactic group ) to prevent the occurrence of ND...

Vision is rarely evaluated scientifically at very large visual angles, despite being used continuously in everyday life. Furthermore, raytrace calculations indicate that peripheral optical properties are different for a pseudophakic eye, and even though this is rarely noted by patients, it is probably the cause of bothersome "negative dysphotopsia." Simplified paraxial parameters that characterize the basic properties of phakic and pseudophakic eyes are collected together here as a baseline, and then raytracing is used to show that input angles of about 60°, which correspond to obstruction by the nose, eyebrow, and cheek, illuminate a retinal hemisphere...

PURPOSE: To adapt the Quality of Vision Questionnaire (QoV) for measuring negative dysphotopsia and to validate the original and modified versions in the Dutch population. METHODS: The QoV was translated into Dutch according to standardized methodology. Negative dysphotopsia items were constructed based on focus group interviews, literature review and clinical data. The questionnaire was completed by 404 subjects, including contact lens wearers, patients with cataract and after cataract surgery (95...

PURPOSE: To evaluate visual performance, spectacle independence, and quality of vision of new intraocular lenses (IOLs) for presbyopia correction with an aspheric inverted meniscus optical design (ArtIOLs; Voptica SL) in patients undergoing bilateral cataract surgery. METHODS: In this prospective study, 60 eyes from 30 patients implanted bilaterally with Art40 and Art70 IOLs were included. These new IOLs were designed with an inverted meniscus shape to improve the peripheral performance and with aspheric surfaces to induce different amounts of negative spherical aberration in each IOL model...

Dysphotopsias are unwanted visual phenomena that occur after cataract surgery. They represent some of the most common reasons for patient dissatisfaction after uncomplicated surgery for cataract phacoemulsification with in-the-bag intraocular lens (IOL) implantation. Depending on the form of the optical phenomenon and the effect it poses on vision, dysphotopsias are divided into positive and negative type. Positive dysphotopsias are usually described by patients as glare, light streaks, starbursts, light arcs, rings, haloes, or flashes of light...

Most studies evaluating cataract surgery focus on the primary outcome of early, central, best-corrected visual acuity. However, cataract surgery and intraocular lens (IOL) design have other secondary visual outcomes as well as impacts on various ocular tissues, the visual function, and quality of life. Some of these aspects are more difficult to quantify, or are historically neglected, but might be extremely important to patients. One important development was the addition of blue-light filtering to IOL design...

PURPOSE: To assess the effect of ocular anatomy and intraocular lens (IOL) design on negative dysphotopsia (ND). SETTING: Department of Ophthalmology, Leiden University Medical Center, Leiden, the Netherlands. DESIGN: Ray-tracing study based on clinical data. METHODS: Ray-tracing simulations were performed to assess the effect of anatomical differences and differences in IOL design on the peripheral retinal illumination...

PURPOSE: To analyse higher-order aberrations of an enhanced monofocal aspheric intraocular lens (IOL) in relation to the clinical outcome compared to a monofocal aspheric IOL. SETTING: Department of Ophthalmology, Charité - Universitätsmedizin Berlin, Germany. DESIGN: Prospective, monocentric, controlled, non-randomized, two-armed study. METHODS: After phacoemulsification, a total of 30 patients (60 eyes) were bilaterally implanted with either TECNIS Eyhance IOL model ICB00 (Johnson & Johnson Surgical Vision, Inc...

PURPOSE: Report experience regarding an anterior capsulotomy fixated intraocular lens (IOL) designed to prevent negative dysphotopsia (ND). METHODS: A prospective, nonrandomized clinical study was done at Péterfy Sándor Street Hospital-Clinic, and Jenő Manninger National Trauma Institute, Budapest, Hungary. The Morcher (Masket) 90S IOL has a circumferential groove on the optic that captures the anterior capsulotomy. Thus, part of the optic projects over and anterior to the capsule edge, while the bulk of the IOL is fixated within the capsular bag...

SIGNIFICANCE: There is a clinical need for a quantitative test to objectively diagnose negative dysphotopsia, especially because the diagnosis is generally assessed using patients' subjective descriptions. In the search of a clinical test to objectify the shadow experienced in negative dysphotopsia, this study excludes static perimetry as suitable evaluation method. PURPOSE: This study aimed to evaluate the value of static perimetry in the objective assessment and follow-up of negative dysphotopsia...

PURPOSE: To evaluate whether orientation of the optic-haptic junction of an intraocular lens (IOL) during cataract surgery could decrease the incidence and/or severity of positive and negative dysphotopsia. DESIGN: Prospective, randomized controlled trial. METHODS: A total of 163 patients (326 eyes) in a private practice scheduled to have bilateral implantation of a Tecnis monofocal IOL (ZCB00) (Johnson & Johnson Vision) were randomly assigned to have the optic-haptic junction positioned vertically, horizontally, superonasally, or inferonasally...

PURPOSE: To analyze visual quality and contrast sensitivity in patients after intraocular lens (IOL) implantation with sutured scleral fixation. SETTING: Chang Gung Memorial Hospital, Taoyuan, Taiwan. DESIGN: Retrospective observational study. METHODS: Data on the refractive outcome, visual acuity, and subjective visual symptoms in patients with scleral-fixated or in-bag IOL implantation were collected from September 2019 to March 2020...

Building on our previously communicated results, the current study evaluates the predictive ability of individualized eye models to localize negative dysphotopsia (ND) in the peripheral field of view (PFoV) In a prospective study conducted at Hanusch Hospital, Vienna, Austria, post-operative biometrical data were acquired from five patients implanted with monofocal IOLs and with ND complaints. A Harms tangent screen subjective method was used to localize in PFoV the perceived shadow (HvF). For computing theoretical retinal irradiance maps, individualized Liou-Brennan (non)-sequential eye models were generated using the acquired biometrical data...

We report a case series of patients with high myopia (axial length 25.04-27.59 mm) diagnosed with cataract and maculopathy who underwent a combined procedure of phacoemulsification with implantation of a large optic intraocular lens (IOL) and intravitreal injection. Six patients with a mean (± standard deviation) age of 73.20 ± 7.19 years received the 7.0-mm optic ASPIRA-aXA IOL (HumanOptics AG, Erlangen, Germany) and intravitreal injection of aflibercept at the end of the surgery. The corrected distance visual acuity (CDVA) improved significantly (p = 0...

PURPOSE: To use optical modeling to compare a 6.0 mm and 7.0 mm intraocular lens (IOL) optic diameters on peripheral retinal illumination with implications for negative dysphotopsia. SETTING: Mayo Clinic, Rochester, Minnesota, and Simpson Optics LLC, Arlington, Texas. DESIGN: Model eye. METHODS: Ray-tracing software was used to simulate retinal illumination from an extended light source for a pseudophakic eye with in-the-bag biconvex IOLs (refractive index [n] = 1...

PURPOSE: To evaluate visual performance and optical quality of an extended depth-of-focus intraocular lens (EDoF IOL) compared with a monofocal aspheric IOL. SETTING: Department of Ophthalmology, Charité-Medical University Berlin, Germany. DESIGN: Prospective case series. METHODS: After phacoemulsification, a total of 28 patients (56 eyes) underwent bilateral implantation of either the Mini Well (EDoF IOL) or the Mini 4 (monofocal IOL)...

A 56-year-old man with an ocular history of strabismus surgery at age 3 years, anatomically narrow angles, and patent laser peripheral iridotomies in both eyes underwent refractive lens exchange in which a SA60AT (Alcon Laboratories, Inc.) 38 diopter (D) intraocular lens (IOL) was implanted in the right eye and a SA60AT 36 D IOL was implanted in the left eye. He presented with symptoms consistent with negative dysphotopsia (ND) in both eyes immediately after surgery, describing temporal dark arcs that were constantly present and did not improve over the past 2 years...

A 56-year-old man with an ocular history of strabismus surgery at age 3 years, anatomically narrow angles, and patent laser peripheral iridotomies in both eyes underwent refractive lens exchange in which a SA60AT (Alcon Laboratories, Inc.) 38 diopter (D) intraocular lens (IOL) was implanted in the right eye and a SA60AT 36 D IOL was implanted in the left eye. He presented with symptoms consistent with negative dysphotopsia (ND) in both eyes immediately after surgery, describing temporal dark arcs that were constantly present and did not improve over the past 2 years...