scholarly journals Cataract Surgery with a Refractive Corneal Inlay in Place

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
N. R. Stojanovic ◽  
S. I. Panagopoulou ◽  
I. G. Pallikaris
Keyword(s):  
Visual Acuity ◽  
Cataract Surgery ◽  
Power Calculation ◽  
Iol Power Calculation ◽  
Uncorrected Distance Visual Acuity ◽  
Usual Manner ◽  
Corneal Inlay ◽  
Standard Manner ◽  
One Year ◽  
The One

Purpose. To present a case of cataract surgery performed in a patient with a refractive corneal inlay in place.Methods. A 48-year-old female patient presented to our institute with bilateral cataract. The patient had undergone refractive corneal inlay implantation three years ago in her right, nondominant eye for presbyopia correction. Biometry and intraocular lens (IOL) power calculation were performed without removing the inlay. Phacoemulsification and IOL insertion were carried out in both eyes in a usual manner.Results. On day one postoperatively, the patient achieved binocular uncorrected distance visual acuity 20/20 and uncorrected near visual acuity J1. The vision remained stable during the one-year follow-up period.Conclusion. Cataract surgery was performed in a standard manner in a patient with Presbia Microlens corneal inlay in place. Visual outcomes for both near and distance vision were satisfactory.

scholarly journals Prediction accuracy of conventional and total keratometry for intraocular lens power calculation in femtosecond laser-assisted cataract surgery

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Soyoung Ryu ◽  
Ikhyun Jun ◽  
Tae-im Kim ◽  
Kyoung Yul Seo ◽  
Eung Kweon Kim
Keyword(s):  
Femtosecond Laser ◽  
Cataract Surgery ◽  
Intraocular Lens ◽  
Intraclass Correlation ◽  
Absolute Error ◽  
Power Calculation ◽  
Prediction Errors ◽  
Intraocular Lens Power Calculation ◽  
Iol Power Calculation ◽  
Severance Hospital

AbstractThis study evaluated the accuracy of total keratometry (TK) and standard keratometry (K) for intraocular lens (IOL) power calculation in eyes treated with femtosecond laser-assisted cataract surgery. The retrospective study included a retrospective analysis of data from 62 patients (91 eyes) who underwent uneventful femtosecond laser-assisted cataract surgery with Artis PL E (Cristalens Industrie, Lannion, France) IOL implantation by a single surgeon between May 2020 and December 2020 in Severance Hospital, Seoul, South Korea. The new IOLMaster 700 biometry device (Carl Zeiss Meditec, Jena, Germany) was used to calculate TK and K. The mean absolute error (MAE), median absolute error (MedAE), and the percentages of eyes within prediction errors of ± 0.25 D, ± 0.50 D, and ± 1.00 D were calculated for all IOL formulas (SRK/T, Hoffer-Q, Haigis, Holladay 1, Holladay 2, and Barrett Universal II). There was strong agreement between K and TK (intraclass correlation coefficient = 0.99), with a mean difference of 0.04 D. For all formulas, MAE tended to be lower for TK than for K, and relatively lower MAE and MedAE values were observed for SRK/T and Holladay 1. Furthermore, for all formulas, a greater proportion of eyes fell within ± 0.25 D of the predicted postoperative spherical equivalent range in the TK group than in the K group. However, differences in MAEs, MedAEs, and percentages of eyes within the above prediction errors were not statistically significant. In conclusion, TK and K exhibit comparable performance for refractive prediction in eyes undergoing femtosecond laser-assisted cataract surgery.

scholarly journals Surgical Treatment of Persistent Fetal Vasculature and Visual Rehabilitation: One-Year Followup

2012 ◽  
Vol 2012 ◽  
pp. 1-2
Author(s):  
N. Kozeis ◽  
K. T. Tsaousis ◽  
D. Gidaris
Keyword(s):  
Visual Acuity ◽  
Surgical Treatment ◽  
Hand Movement ◽  
Good Prognosis ◽  
Posterior Chamber ◽  
Visual Rehabilitation ◽  
Postoperative Course ◽  
Persistent Fetal Vasculature ◽  
One Year ◽  
The One

We present the management and postoperative course of a persistent fetal vasculature (PFV) case. A four-year-old girl visited the Eye Department of Hippokration, General Hospital of Thessaloniki due to reduced visual acuity of her left eye. She was diagnosed with PFV and underwent surgery (lensectomy, capsulorhexis of the posterior capsule, insertion of an intraocular lens in the posterior chamber, and posterior vitrectomy) in order to dissect the PFV. Along with the postoperative medical care, she underwent intensive treatment for amblyopia. The postoperative course was uncomplicated, and the visual acuity of her left eye improved from hand movement to 20/25 with proper correction. Patients with unilateral PFV and gradually deteriorating visual acuity could be good candidates for a combined surgical procedure, as the one described above, with a good prognosis.

scholarly journals Comparison of Visual Outcomes and Patient Satisfaction Between two Diffractive Trifocal Intraocular Lenses

2021 ◽  
Author(s):  
asli cetinkaya yaprak ◽  
Mustafa Unal
Keyword(s):  
Visual Acuity ◽  
Patient Satisfaction ◽  
Cataract Surgery ◽  
Intraocular Lenses ◽  
World Health ◽  
Uncorrected Distance Visual Acuity ◽  
Significant Difference ◽  
Prospective Comparative Study ◽  
Health Organization ◽  
Clinical Trials Registry

Abstract Purpose To evaluate the clinical outcomes and visual quality of patients undergoing cataract surgery with the implantation of two different models of diffractive trifocal intraocular lenses (IOLs).MethodsThis randomized prospective comparative study included 60 eyes of 15 patients who scheduled to undergo bilateral cataract surgery with the implantation of two models of diffractive trifocal IOLs (RayOne Trifocal and AcrySof IQ PanOptix IOL). Monocular and binocular corrected and uncorrected distance visual acuity (CDVA, UDVA), intermediate visual acuity (DCIVA, UIVA) at 60 and 80 cm, near visual acuity (DCNVA, UNVA), and patient satisfaction were compared over a three-month follow-up.ResultsEach group comprised 30 eyes of 15 patients. No statistically significant differences were determined between the groups in terms of CDVA, UDVA, DCNVA and UNVA. The monocular and binocular UIVA values at 60 cm were better in the PanOptix IOL group (p=0.04 and p=0.01, respectively), and the DCIVA and UIVA values at 80 cm were better in the RayOne IOL group (p=0.01, p=0.047, p<0.001, and p=0.042, respectively). No statistically significant difference was found between the groups in relation to the frequency and severity of visual symptoms evaluated. Regarding discomfort, the RayOne IOL group had more bothersome halos and starbursts (p=0.026 and p=0.01, respectively).ConclusionBoth IOLs provided very good restoration of visual acuity. However, with the AcrySof IQ PanOptix IOL, the likelihood of patients experiencing bothersome halos and starbursts was less. The RayOne Trifocal IOL might be a better choice for patients who require further intermediate vision.The study was registered under the World Health Organization international clinical trials registry platform: NCT04655274, 30/11/2020, prospectively registered.

Cataract surgery in children: visual acuity and refractive error outcomes one year after surgery

2017 ◽  
Vol 21 (4) ◽  
pp. e34
Author(s):  
Michael X. Repka ◽  
Trevano W. Dean ◽  
Raymond T. Kraker ◽  
David K. Wallace ◽  
Erick D. Bothun ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Cataract Surgery ◽  
Refractive Error ◽  
One Year

scholarly journals An innovative approach for determining the customized refractive index of ectatic corneas in cataractous patients

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Shiva Pirhadi ◽  
Keivan Maghooli ◽  
Khosrow Jadidi
Keyword(s):  
Refractive Index ◽  
Cataract Surgery ◽  
Ray Tracing ◽  
Prediction Error ◽  
Power Calculation ◽  
Corneal Power ◽  
Iol Power Calculation ◽  
Iol Power ◽  
Hyperopic Shift ◽  
The Difference

Abstract The aim of this study is to determine the customized refractive index of ectatic corneas and also propose a method for determining the corneal and IOL power in these eyes. Seven eyes with moderate and severe corneal ectatic disorders, which had been under cataract surgery, were included. At least three months after cataract surgery, axial length, cornea, IOL thickness and the distance between IOL from cornea, and aberrometry were measured. All the measured points of the posterior and anterior parts of the cornea converted to points cloud and surface by using the MATLAB and Solidworks software. The implanted IOLs were designed by Zemax software. The ray tracing analysis was performed on the customized eye models, and the corneal refractive index was determined by minimizing the difference between the measured aberrations from the device and resulted aberrations from the simulation. Then, by the use of preoperative corneal images, corneal power was calculated by considering the anterior and posterior parts of the cornea and refractive index of 1.376 and the customized corneal refractive index in different regions and finally it was entered into the IOL power calculation formulas. The corneal power in the 4 mm region and the Barrett formula resulted the prediction error of six eyes within ± 1 diopter. It seems that using the total corneal power along with the Barrett formula can prevent postoperative hyperopic shift, especially in eyes with advanced ectatic disorders.

scholarly journals Concurrent Phacoemulsification and Encircling for Hypotony Maculopathy after Blunt Trauma

2020 ◽  
Vol 2020 ◽  
pp. 1-3
Author(s):  
Takayuki Baba ◽  
Hirotaka Yokouchi ◽  
Shuichi Yamamoto
Keyword(s):  
Visual Acuity ◽  
Intraocular Pressure ◽  
Cataract Surgery ◽  
Blunt Trauma ◽  
Intraocular Lens ◽  
Secondary Cataract ◽  
Hypotony Maculopathy ◽  
Uveoscleral Outflow ◽  
Old Japanese ◽  
One Year

A 37-year-old Japanese man had his right eye hit by a fist. His right eye developed hypotony maculopathy and secondary cataract, and his visual acuity decreased to 20/200 with an intraocular pressure of 4 mmHg. He underwent phacoemulsification and aspiration, implantation of the intraocular lens, and encircling with a silicone tire. His visual acuity improved to 20/20 and stable for more than one year postoperatively. The intraocular pressure in his right eye increased to 12 mmHg, and maculopathy was resolved entirely. It was suggested that an encircling buckle obstructed the uveoscleral outflow through the cyclodialysis and increased intraocular pressure. Concurrent cataract surgery and encircling was sufficient to improve the vision.

scholarly journals Cataract Surgery following Sequential Myopic and Hyperopic LASIK

2018 ◽  
Vol 9 (2) ◽  
pp. 264-268
Author(s):  
Tao Ming Thomas Chia ◽  
Hoon C. Jung
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Calculation Method ◽  
Cataract Extraction ◽  
Power Calculation ◽  
Iol Implantation ◽  
Patient Dissatisfaction ◽  
Iol Power Calculation ◽  
Iol Power

We report a case of patient dissatisfaction after sequential myopic and hyperopic LASIK in the same eye. We discuss the course of management for this patient involving eventual cataract extraction and intraocular lens (IOL) implantation with attention to the IOL power calculation method used.

scholarly journals Improving Intraocular Lens Calculation in Fuchs Endothelial Dystrophy According To Preoperative Degree of Corneal Edema

2021 ◽  
Author(s):  
Beatriz Gargallo-Martinez ◽  
Amanda Ortiz-Gomariz ◽  
Ana Maria Gomez-Ramirez ◽  
Angel Ramon Gutiérrez-Ortega ◽  
Jose Javier Garcia-Medina
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Refractive Error ◽  
Target Selection ◽  
Corneal Transplantation ◽  
Corneal Edema ◽  
Power Calculation ◽  
Iol Power Calculation ◽  
Iol Power ◽  
Fuchs Endothelial Dystrophy

Abstract Fuchs endothelial dystrophy (FED) is a bilateral, asymmetric, progressive corneal endothelium disorder that causes corneal edema. Resolution of corneal edema is only possible by corneal transplantation. Cataract surgery is a common surgery that replaces the natural lens of the eye by an artificial intraocular lens (IOL). The IOL-power calculation depends mainly on the anterior corneal keratometry and the axial length. In patients with FED, anterior keratometry may be affected by corneal edema and calculations may be less accurate. Therefore, the aim of this study is to establish the theorical postoperative refractive error due to corneal edema resolution after Descemet stripping endothelial keratoplasty combined with cataract surgery and IOL implantation. For this, anterior keratometry was measure preoperatively with edematous cornea and postoperatively after corneal edema resolution. Both keratometries were compared and used to calculate the respective theorical IOL-powers. The difference between target IOLs was used to establish the theorical refractive error due to corneal edema resolution. The results showed that corneal edema resolution induces a change in anterior keratometry, which affects IOL-power calculations and causes a hyperopic shift. The patients with moderate-to-severe preoperative corneal edema had higher theorical refractive error so their target selection should be adjusted for additional − 0.50D.

Sign in / Sign up

Export Citation Format

Share Document