scholarly journals Prediction Error Stabilization and Long-Term Standard Results with a Monofocal Intraocular Lens

Vision ◽  
2022 ◽  
Vol 6 (1) ◽  
pp. 5
Author(s):  
Beatríz Macías-Murelaga ◽  
Gonzaga Garay-Aramburu ◽  
Roberto Bergado-Mijangos ◽  
Daniel Coello-Ojeda ◽  
Itziar Ozaeta ◽  
...  
Keyword(s):  
Intraocular Lens ◽  
High Power ◽  
Prediction Error ◽  
Visual Performance ◽  
Posterior Capsular Opacification ◽  
Myopic Shift ◽  
Hyperopic Shift ◽  
The Stability

The aim of this study was to assess the stability and differences between objective (O-Rx) and subjective (S-Rx) refraction for the assessment of the prediction error (PE). A secondary aim was to report the results of a monofocal intraocular lens (IOL). 100 subjects were included for whom S-Rx and O-Rx were obtained for all visits, and for visual performance, posterior capsular opacification incidence and Nd:YAG rates at 12 months. Either S-Rx and O-Rx showed a hyperopic shift from 1 to 6 months (p < 0.05) and stabilization after 6 months. S-Rx was related with the axial length (rho = −0.29, p = 0.007), obtaining a major tendency towards hyperopia in short eyes implanted with high-power IOLs. O-Rx showed a myopic shift in comparison to S-Rx (p < 0.05). This resulted in a decrease of the number of eyes in ±0.50 D and ±1.00 D from 79 to 67% and from 94 to 90%, respectively. The median (interquartile range) uncorrected and corrected visual acuities were 0.1 (0.29) and 0 (0.12) logMAR, respectively, and seven eyes required Nd:YAG capsulotomy at 12 months. Some caution should be taken in PE studies in which O-Rx is used or S-Rx is measured in a 1-month follow-up. Constant optimization should be conducted for this IOL after S-Rx stabilization.

scholarly journals Long-Term Clinically Significant Posterior Capsular Opacification Development Pattern in Eyes Implanted with an Aspheric Monofocal Intraocular Lens with a Square Optic Edge

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Javier Placeres Dabán ◽  
Juan Carlos Elvira ◽  
César Azrak ◽  
Lucía Rial ◽  
David P. Piñero ◽  
...  
Keyword(s):  
Intraocular Lens ◽  
Posterior Capsular Opacification ◽  
Development Pattern ◽  
Kaplan Meier ◽  
Iol Power ◽  
Monofocal Iol ◽  
Clinically Significant ◽  
Type Of Anaesthesia

Purpose. To analyse the posterior capsular opacification (PCO) development pattern in the long term in eyes implanted with a monofocal intraocular lens (IOL) with a square edge all around the optic. Methods. Longitudinal retrospective study is data analyzed from a total of 7059 eyes from 4764 patients (mean age: 75.8 years) undergoing cataract surgery with implantation of an aspheric monofocal IOL (Bi-Flex HL 677AB/677P, Medicontur, Budapest, Hungary). These data were retrospectively collected using the electronic medical record of the hospitals involved. Nd : YAG capsulotomy rates were calculated per year during a follow-up of more than 10 years. The Kaplan–Meier analysis was used to establish the transparent capsule survival rate. Results. The Nd : YAG capsulotomy rate increased from 1.1% at 1 year postoperatively to 17.2% at 5 years after surgery. No significant differences were found between eyes with and without capsulotomy in terms of age p = 0.202 , gender p = 0.061 , type of anaesthesia used p = 0.128 , and presence of conditions such as hard cataract p = 0.111 or pseudoexfoliation p = 0.137 . IOL power was significantly lower in those eyes of patients requiring Nd : YAG capsulotomy during the follow-up p < 0.001 . Significantly more eyes implanted with the preloaded model of the IOL required capsulotomy p < 0.001 . Mean survival time and rate were 9.38 years and 85.9%, respectively. Conclusions. Most eyes undergoing cataract with implantation of the Bi-Flex IOL do not develop a clinically significant PCO requiring Nd : YAG capsulotomy in the long term. IOL material and design may be the main factors accounting for this finding.

Long-term results after primary intraocular lens implantation in children with juvenile idiopathic arthritis–associated uveitis

2018 ◽  
Vol 29 (5) ◽  
pp. 494-498 ◽  
Author(s):  
Urszula Kulik ◽  
Anna Wiklund ◽  
Maria Kugelberg ◽  
Anna Lundvall
Keyword(s):  
Juvenile Idiopathic Arthritis ◽  
Cataract Surgery ◽  
Intraocular Lens ◽  
Long Term Results ◽  
Posterior Capsular Opacification ◽  
Intraocular Lens Implantation ◽  
Lens Implantation ◽  
Primary Intraocular Lens Implantation

Purpose: To evaluate the long-term outcome after cataract surgery with primary intraocular lens implantation in children with juvenile idiopathic arthritis–associated uveitis. Methods: The medical records of all 24 children (34 eyes) with chronic juvenile idiopathic arthritis–associated uveitis who underwent cataract surgery between 1990 and 2013 were reviewed retrospectively. Primary intraocular lens implantation was performed in all patients. Results: Median age at diagnosis of uveitis in the first eye was 5.3 years (range: 2.7–9.4 years) and median age at the time of cataract surgery in the first eye was 9.7 years (range: 4.1–16.9 years). Postoperative follow-up time ranged from 1 to 23.1 years, with a median of 10.9 years. Best corrected visual acuity at the last follow-up was good (⩾20/40) in 65% of the eyes. Postoperatively, glaucoma developed in 8 eyes (24%), posterior capsular opacification and secondary membrane formation requiring surgery in 15 eyes (44%), macular oedema in 5 eyes (15%) and phthisis in 2 eyes (6%). Conclusion: This study shows a favourable visual outcome in most of the cases. Primary intraocular lens implantation may be considered in juvenile idiopathic arthritis–associated uveitis complicated by cataract in patients with well-controlled inflammation.

scholarly journals An unusually low density ultra-short period super-Earth and three mini-Neptunes around the old star TOI-561

2020 ◽  
Author(s):  
G Lacedelli ◽  
L Malavolta ◽  
L Borsato ◽  
G Piotto ◽  
D Nardiello ◽  
...  
Keyword(s):  
Transit Time ◽  
Time Variation ◽  
Planetary System ◽  
Radial Velocities ◽  
Low Density ◽  
Outer Planets ◽  
Short Period ◽  
The Stability

Abstract Based on HARPS-N radial velocities (RVs) and TESS photometry, we present a full characterisation of the planetary system orbiting the late G dwarf After the identification of three transiting candidates by TESS, we discovered two additional external planets from RV analysis. RVs cannot confirm the outer TESS transiting candidate, which would also make the system dynamically unstable. We demonstrate that the two transits initially associated with this candidate are instead due to single transits of the two planets discovered using RVs. The four planets orbiting TOI-561 include an ultra-short period (USP) super-Earth (TOI-561 b) with period Pb = 0.45 d, mass Mb = 1.59 ± 0.36 M⊕ and radius Rb = 1.42 ± 0.07 R⊕, and three mini-Neptunes: TOI-561 c, with Pc = 10.78 d, Mc = 5.40 ± 0.98 M⊕, Rc = 2.88 ± 0.09 R⊕; TOI-561 d, with Pd = 25.6 d, Md = 11.9 ± 1.3 M⊕, Rd = 2.53 ± 0.13 R⊕; and TOI-561 e, with Pe = 77.2 d, Me = 16.0 ± 2.3 M⊕, Re = 2.67 ± 0.11 R⊕. Having a density of 3.0 ± 0.8 g cm−3, TOI-561 b is the lowest density USP planet known to date. Our N-body simulations confirm the stability of the system and predict a strong, anti-correlated, long-term transit time variation signal between planets d and e. The unusual density of the inner super-Earth and the dynamical interactions between the outer planets make TOI-561 an interesting follow-up target.

Posterior chamber phakic intraocular lens to correct myopia: Long-term follow-up

2013 ◽  
Vol 39 (7) ◽  
pp. 1023-1028 ◽  
Author(s):  
Necip Torun ◽  
Eckart Bertelmann ◽  
Matthias K.J. Klamann ◽  
Anna-Karina Maier ◽  
Anja Liekfeld ◽  
...  
Keyword(s):  
Intraocular Lens ◽  
Posterior Chamber ◽  
Phakic Intraocular Lens ◽  
Long Term Follow Up

Long-Term Stability of Sutured Scleral Fixation of a Posterior Chamber Intraocular Lens With 10-0 Polypropylene for More Than 30 Years

2021 ◽  
pp. 247412642097887
Author(s):  
Gregg T. Kokame ◽  
Tarin T. Tanji ◽  
Jase N. Omizo
Keyword(s):  
Intraocular Lens ◽  
Posterior Chamber ◽  
Scleral Flap ◽  
Scleral Fixation ◽  
Polypropylene Suture ◽  
Long Term Stability ◽  
Posterior Chamber Intraocular Lens ◽  
Polypropylene Sutures

Purpose: We report the longest follow-up to our knowledge of stable scleral fixation of a posterior chamber intraocular lens (PC IOL) with 10-0 polypropylene sutures. Methods: A retrospective review is presented of a case with more than 30 years’ follow-up after performing sutured scleral fixation with 10-0 polypropylene suture using 2 sutures tied together under a scleral flap. One suture was a cow-hitch looped around the haptic, and the other suture was passed through the sclera to create the scleral fixation. Results: The scleral fixation with 10-0 polypropylene suture knots for both haptics of the PC IOL allowed central optic positioning with excellent vision for more than 30 years without suture breakage. Conclusions: Polypropylene sutures for scleral fixation of PC IOLs remained stable for more than 30 years with central positioning of the PC IOL, without exposure of the fixation suture knots through the conjunctiva, and without suture breakage.

Long-term pathologic follow-up of obsolete design: Choyce Mark VIII anterior chamber intraocular lens

2012 ◽  
Vol 38 (2) ◽  
pp. 368-372 ◽  
Author(s):  
Andrew Ollerton ◽  
Brian C. Stagg ◽  
Lisa Leishman ◽  
Zachary Bodnar ◽  
Liliana Werner ◽  
...  
Keyword(s):  
Anterior Chamber ◽  
Intraocular Lens

scholarly journals Posterior capsular calcification without opacification of intraocular lens

2016 ◽  
Vol 8 (1) ◽  
pp. 91-94
Author(s):  
Rajesh S Joshi
Keyword(s):  
Visual Acuity ◽  
Intraocular Lens ◽  
Posterior Capsule ◽  
Posterior Capsular Opacification ◽  
Slit Lamp ◽  
Peripheral Part ◽  
Postoperative Visual Acuity ◽  
The Third ◽  
Early Occurrence

Background: Posterior capsular clarity is important for long-term visual gain. Postoperative visual acuity could be reduced due to posterior capsular or intraocular lens opacification, which occur months or years after cataract surgery. We report early occurrence of posterior capsular calcification without opacification of intraocular lens. Case: We report the case of a 78-year-old male who had undergone phacoemulsification with implantation of hydrophilic intraocular lens (IOL) in the left eye for cataract. The patient was non-diabetic, and the surgical procedure was uneventful. On the third postoperative day, fine granular deposits were found on the mid-peripheral part of the posterior capsule. No deposits were found on IOL. The patient presented with diminished vision four months after surgery. Slit-lamp examination revealed distinct areas of calcification with an early opacification of the posterior capsule and no IOL calcification. Neodymium doped: YAG capsulotomy was done to clear posterior capsular opacification, and the patient regained visual acuity of 20/20. To the best of our knowledge, this report is the first to investigate posterior capsular calcification without opacification of IOL in a patient without any known etiological factors. Conclusion: This case is reported to stimulate future study on the use of BSS plus and the development of posterior capsular or IOL calcification. Nepal J Ophthalmol 2016; 8(15): 91-94

Refractive and Visual Outcomes after Scleral Fixated Intraocular Lens Implantation in Children with Ectopia Lentis

2020 ◽  
Vol 12 (1) ◽  
pp. 75-82
Author(s):  
Regina Lalramhluni ◽  
Soveeta Rath ◽  
Ankita Shrivastav ◽  
Prem Kumar Singh ◽  
Rahul Mayor ◽  
...  
Keyword(s):  
Intraocular Lens ◽  
Visual Outcome ◽  
Ectopia Lentis ◽  
Corrected Visual Acuity ◽  
Good Visual Outcome ◽  
Induced Astigmatism ◽  
The Mean ◽  
The Stability ◽  
Scleral Fixated Intraocular Lens

Introduction: This study was conducted to report the refractive and visual outcome after Scleral Fixated Intraocular Lens (SFIOL) implantation in children with nontraumatic ectopia lentis. Methods: Retrospective review of the medical records of 25 eyes of 15 patients who underwent SFIOL implantation in children with non-traumatic ectopia lentis. Results: The mean best corrected visual acuity (BCVA) before SFIOL implantation was 1.07 ± 0.9 logMar units [median: 0.9, Interquartile range (ΙQR): 0.415 to 1.555] which improved to 0.41 ± 0.33 logMar units (median: 0.22, ΙQR: 0.180 to 1.555) at two months postoperative follow up. In phakic group, the mean spherical refraction preoperatively was -12.04 ± 7.82 DS (dioptre sphere) (IQR: +16 to -5.875) and postoperatively was +0.93 ± 2.67DS (IQR: -0.375 to +2). In aphakic group, the mean spherical refraction preoperatively was +12.22 ± 2.05 DS and postoperatively was +1.2 ± 1.9 DS. The mean total astigmatism preoperatively was -6.44 ± 4.95 DC (dioptre cylinder) (median: 6, IQR: -10.50 to +2) and postoperatively was -1.47 ± 0.98 DC (median: -1.5, IQR: -2 to - 0.625 ). The mean IOL induced astigmatism was -1.01 ± 0.95 DC (median -0.75, IQR: -1.33 to - 0.25). The spherical refractive equivalent was within 2 Diopter (D) of the target refraction calculated preoperatively in 20 eyes and in five eyes it was more than 2 D. Conclusion: SFIOL implantation is associated with good visual outcome with a significant improvement in the refractive error. However, a longer follow up is required to assess the change of refraction and the stability of the SFIOL.

scholarly journals Transscleral Fixation of Black Diaphragm Intraocular Lens in Complete Aniridia and Aphakia Due to Posttraumatic Eye Rupture: A Pilot Study

2019 ◽  
Vol 8 (1) ◽  
pp. 46
Author(s):  
Tomasz Chorągiewicz ◽  
Katarzyna Nowomiejska ◽  
Dariusz Haszcz ◽  
Dominika Nowakowska ◽  
Teresio Avitabile ◽  
...  
Keyword(s):  
Intraocular Lens ◽  
Anterior Segment ◽  
Case Series ◽  
Functional Restoration ◽  
Long Term Outcomes ◽  
Ahmed Valve ◽  
Post Traumatic ◽  
Valve Implantation

Introduction: To assess long-term outcomes of implantation of black diaphragm intraocular lens (BD IOL) in post-traumatic aniridia and aphakia due to eye rupture. Methods: This is a retrospective consecutive case series of 14 eyes with post-traumatic complete aniridia and aphakia treated with scleral fixation BD IOL. Measurements included ophthalmological comorbidities, best corrected visual acuity (BCVA), complications, and postoperative interventions. The average postoperative follow-up period was 36 months. Results: BCVA improved in 6 cases, was stable in 6 cases and worsened in 2 cases. The lens was well centered in 13 cases. Glaucoma was diagnosed in six cases developed, and three of them required Ahmed valve implantation. One lens developed opacity. The cornea was decompensated in 6 cases, while two of them required penetrating keratoplasty. Conclusion: Implantation of BD IOL in eyes with severely traumatized eyes enables reconstruction of the anterior segment and some functional restoration, although many complications may arise during the longitudinal follow-up.

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