Cataract

2016 ◽  
Author(s):  
Georgia Cleary ◽  
Allon Barsam
Keyword(s):  
Cataract Surgery ◽  
Visual Impairment ◽  
Crystalline Lens ◽  
Developed Countries ◽  
Infectious Complications ◽  
Intraocular Lenses ◽  
Clinical Knowledge ◽  
Practical Skills ◽  
Nd:Yag Laser Capsulotomy ◽  
Elective Surgical Procedure

This chapter focuses on cataract, which is the pathological opacification of the crystalline lens. Cataract is an important cause of visual impairment and blindness worldwide, in both developed and developing countries. Fortunately, acquired cataract is a reversible cause of visual impairment and, in developed countries, cataract surgery is the most commonly performed elective surgical procedure. This chapter outlines lens anatomy and embryology, along with clinical knowledge areas that include acquired cataract (clinical evaluation and treatment), intraoperative and post-operative (infectious and non-infectious) complications of cataract surgery, and lens dislocation. Practical skills, including biometry, local anaesthesia, implantation of intraocular lenses, and Nd:YAG laser capsulotomy, are also discussed.

Cataract

2012 ◽  
Author(s):  
Georgia Cleary ◽  
David Spalton
Keyword(s):  
Postoperative Complications ◽  
Cataract Surgery ◽  
Congenital Cataract ◽  
Intraoperative Complications ◽  
Intraocular Lenses ◽  
Posterior Capsular Opacification ◽  
Clinical Knowledge ◽  
Practical Skills ◽  
Age Related ◽  
Nd:Yag Laser Capsulotomy

The chapter begins by discussing lens anatomy and embryology, before covering the key areas of clinical knowledge, namely acquired cataract, clinical evaluation of acquired cataract, treatment for acquired cataract, intraoperative complications of cataract surgery, infectious postoperative complications of cataract surgery, non-infectious postoperative complications of cataract surgery, congenital cataract, management of congenital cataract, and lens dislocation. Practical skills are then covered, including biometry, local anaesthesia, operating microscope and phacodynamics, intraocular lenses, and Nd:YAG laser capsulotomy. The chapter concludes with three case-based discussions, on age-related cataract, postoperative endophthalmitis, and posterior capsular opacification.

Presbyopia-correcting Intraocular Lenses in Cataract Surgery—A Focus on ReSTOR® Intraocular Lenses

2011 ◽  
Vol 04 (01) ◽  
pp. 44 ◽  
Author(s):  
Bret L Fisher ◽  
Keyword(s):  
Side Effects ◽  
Cataract Surgery ◽  
Blue Light ◽  
Crystalline Lens ◽  
Intraocular Lenses ◽  
Significant Advance ◽  
Near Vision ◽  
Significant Challenge ◽  
Corneal Aberrations ◽  
Cataract Patients

Correction for presbyopia in cataract patients is a significant challenge for ophthalmologists and cataract surgeons, however, an increasingly diverse array of intraocular lenses (IOLs) that are capable of providing good quality near vision is available. Currently available synthetic lenses use different technologies to correct for presbyopia. The latest iterations of the AcrySof® ReSTOR® IOLs combine an optic with a central apodized diffractive zone, a peripheral refractive zone, an aspheric anterior to combat corneal aberrations, and an ultraviolet (UV)- and blue-light filtering chromophore. The AcrySof® IQ ReSTOR® IOLs provide excellent near vision restoration with increased spectacle independence and minimal severe side effects. As a result, it may represent a significant advance over other presbyopia-correcting technologies. IOLs such as the AcrySof® IQ ReSTOR® are increasingly replicating the full visual capabilities of the crystalline lens and are an important advancement in the treatment of presbyopia in cataract patients.

scholarly journals Prediction accuracy of standard and total keratometry by swept-source optical biometer for multifocal intraocular lens power calculation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hun Lee ◽  
Jae Lim Chung ◽  
Young Jun Kim ◽  
Jae Yong Kim ◽  
Hungwon Tchah
Keyword(s):  
Cataract Surgery ◽  
Case Series ◽  
Intraocular Lenses ◽  
Power Calculation ◽  
Neutral Position ◽  
Swept Source ◽  
Refractive Outcomes ◽  
Case Series Study ◽  
Significant Difference ◽  
Optical Biometer

AbstractWe aimed to compare the refractive outcomes of cataract surgery with diffractive multifocal intraocular lenses (IOLs) using standard keratometry (K) and total keratometry (TK). In this retrospective observational case series study, a total of 302 patients who underwent cataract surgery with multifocal IOL implantation were included. Predicted refractive outcomes were calculated based on the current standard formulas and a new formula developed for TK using K and TK, which were obtained from a swept-source optical biometer. At 2-month postoperatively, median absolute prediction errors (MedAEs) and proportion of eyes within ± 0.50 diopters (D) of predicted postoperative spherical equivalent (SE) refraction were analyzed. There was no significant difference between MedAEs or proportion of eyes within ± 0.50D of predicted refraction from K and TK in each formula. In TFNT00 and 839MP IOL cases, there was no difference between MedAEs from K and TK using any formula. In 829MP IOL cases, MedAE from TK was significantly larger than that from K in Barrett Universal II/Barrett TK Universal II (P = 0.033). In 677MY IOL cases, MedAE from TK was significantly larger than that from K in Haigis (P = 0.020) and Holladay 2 (P = 0.006) formulas. In the subgroup analysis for IOL, there was no difference between the proportion of eyes within ± 0.50 D of predicted refraction from K and TK using any formula. TFNT00 and 839MP IOLs were favorable with TK, with 677MY IOL with K and 829MP IOL being in a neutral position, which necessitates the study that investigates the accuracy of the new TK technology.

Vitreoretinal Surgery in the Treatment of Dislocations of Intraocular Lens and Nucleus-Lens Particules into the Vitreous Cavity

2021 ◽  
pp. 2-6
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Relative Frequency ◽  
Surgical Techniques ◽  
Vitreoretinal Surgery ◽  
Vitreous Cavity ◽  
Intraocular Lenses

Drops of lens nucleus/cortex particles into the vitreous cavity or dislocations of intraocular lenses (IOLs) are one of the serious complications of cataract surgery with an increasing relative frequency with the increase in the number of cataract surgeries. In addition, spontaneous and traumatic dislocations are other common case groups that should be treated. In this article, the vitreous dislocations of nucleus/cortex residues or IOL dislocations are discussed with different vitreoretinal surgical techniques.

Comparative analysis of visual outcomes of multifocal and monofocal intraocular lenses in congenital cataract surgery

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Luca Buzzonetti ◽  
Sergio Petroni ◽  
Carlo Maria De Sanctis ◽  
Paola Valente ◽  
Matteo Federici ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Cataract Surgery ◽  
Congenital Cataract ◽  
Intraocular Lenses ◽  
Visual Outcomes ◽  
Congenital Cataract Surgery
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