scholarly journals Phacoemulsification: Proposals for Improvement in Its Application

Healthcare ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1603
Author(s):  
Marta Benítez Martínez ◽  
David Baeza Moyano ◽  
Roberto Alonso González-Lezcano
Keyword(s):  
Side Effects ◽  
Visual System ◽  
Cataract Surgery ◽  
Intraocular Lens ◽  
Surgical Procedure ◽  
Crystalline Lens ◽  
Ultrasonic Waves ◽  
Medical Professionals ◽  
Health Authorities ◽  
Mechanical Waves

A cataract is defined as opacity of the crystalline lens. It is currently one of the most prevalent ocular pathologies and is generally associated with aging. The most common treatment for cataracts is surgery. Cataract surgery is a quick and painless process, is very effective, and has few risks. The operation consists of removing the opacified lens and replacing it with an intraocular lens. The most common intraocular lens removal procedure that is currently used is phacoemulsification. The energy applied in this process is generated by ultrasonic waves, which are mechanical waves with a frequency higher than 20 kHz. A great deal of research on the different ways to perform the stages of this surgical procedure and the analysis of the possible side effects of the operation has been published, but there is little information on the technical characteristics, the intensities applied, and the use of ultrasound-emitting (U/S) equipment for cataract removal. More studies on the method and depth of absorption of ultrasonic waves in our visual system when performing the phacoemulsification procedure are needed. It would be advisable for health authorities and medical professionals to develop guidelines for the handling and use of ultrasonic wave-emitting equipment, such as those that exist for ultrasound and physiotherapy. This could help us to reduce undesirable effects after the operation.

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.

Cataract Surgery in the Glaucoma Patient

2011 ◽  
Vol 04 (01) ◽  
pp. 52
Author(s):  
Brooks J Poley ◽  
Richard L Lindstrom ◽  
Thomas W Samuelson ◽  
Richard R Schulze ◽  
◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Glaucoma Patient ◽  
Crystalline Lens ◽  
Glaucoma Surgery ◽  
Combined Procedure ◽  
The Past ◽  
Lens Implantation ◽  
Corneal Incisions

This article describes the changing treatment of co-existent cataract and glaucoma over the past 70 years. Seventy years ago, the cataract was removed using an intracapsular technique. Glaucoma was always controlled with a scleral fistulizing operation before the cataract was removed. In 1975, Charles Kelman introduced phacoemulsification. When clear corneal incisions were introduced for phacoemulsification, glaucoma surgery no longer needed to precede cataract surgery. The combined procedure of phacoemulsification/lens implantation and trabeculectomy became popular 10 years ago. Recently, non-bleb treatments for glaucoma have emerged that eliminate the problems associated with trabeculectomy. These procedures include phaco/intraocular lens (IOL) alone, trabectome, iStent®, and canaloplasty. A major cause of adult glaucoma, the enlarging crystalline lens as it ages, was recognized in 2007. Greater IOP reductions following phaco/IOL alone were discovered at this time. Phaco/IOL may emerge as the preferred treatment of co-existent cataract and glaucoma. Trabectome can be added to phaco/IOL if greater IOP reduction is needed.

scholarly journals Relationship between Crystalline Lens Thickness and Shape and the Identification of Anterior Ocular Segment Parameters for Predicting the Intraocular Lens Position after Cataract Surgery

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Tsukasa Satou ◽  
Kimiya Shimizu ◽  
Shuntaro Tsunehiro ◽  
Akihito Igarashi ◽  
Sayaka Kato ◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Prediction Error ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Crystalline Lens ◽  
Lens Thickness ◽  
Lens Position ◽  
The Difference ◽  
Segment Data

Purpose. This study was performed to investigate the relationships among crystalline lens shape, actual intraocular lens (IOL) position, and crystalline lens thickness (LT), as measured by anterior segment optical coherence tomography (AS-OCT), and to determine anterior ocular segment parameters that predict postoperative IOL position. Methods. Seventy-nine eyes of 79 patients who underwent uneventful cataract surgery were enrolled. For crystalline lens preoperative anterior segment data, the LT, and anterior, equatorial, and posterior surface depths (ASD, ESD, and PSD, respectively) of crystalline lenses were quantitatively determined. For postoperative anterior segment data, the actual IOL position was quantified. Moreover, the following correlations were analyzed: LT with the ASD, ESD, PSD, and IOL position; IOL position with the ASD, ESD, and PSD; and refractive prediction error with the difference between the predicted postoperative anterior chamber depth (ACD) of the SRK/T formula and the IOL position, ASD, ESD, and PSD (each depth minus the predicted postoperative ACD of the SRK/T formula). Results. The LT was significantly correlated with the ASD (r = -0.65) and PSD (r = 0.41), whereas it was not correlated with the ESD or IOL position. The IOL position was significantly correlated with the ASD (r = 0.67), ESD (r = 0.72), and PSD (r = 0.74). The refractive prediction error was significantly correlated with the difference between the predicted postoperative ACD of the SRK/T formula and the IOL position (r = 0.65), ASD (r = 0.46), ESD (r = 0.54), and PSD (r = 0.58). Conclusions. The ESD and PSD obtained using AS-OCT were highly correlated with the IOL position and significantly correlated with the refractive prediction error. These findings suggest that the ESD and PSD may enhance the accuracy of actual IOL position prediction.

Stabilization of the position of the intraocular lens in cataract surgery against the background of lens subluxation

2020 ◽  
Author(s):  
Y.V. Belonozhenko ◽  
◽  
E.L. Sorokin ◽  
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Lens Subluxation

Монография посвящена изучению возможностей профилактики послеоперационной спонтанной дислокации комплекса «ИОЛ – капсульный мешок» при выполнении факоэмульсификации в глазах с сочетанием возрастной катаракты и инволюционного подвывиха хрусталика первой степени. Авторами изучены степени тяжести и исходы спонтанной дислокации комплекса «ИОЛ – капсульный мешок» нетравматического генеза после выполнения неосложненной факоэмульсификации, частота инволюционного подвывиха хрусталика первой степени у пациентов с возрастной катарактой перед выполнением факоэмульсификации; технические особенности, интра- и послеоперационные осложнения выполнения факоэмульсификации при инволюционном подвывихе хрусталика первой степени; ближайшая и отдаленная эффективность стабильности положения ИОЛ РСП-3 после выполнения факоэмульсификации катаракты, сочетающейся с инволюционным подвывихом хрусталика первой степени, разработаны показания к выполнению имплантации ИОЛ РСП-3 по собственной технологии и уточнены противопоказания; разработана хирургическая технология имплантации ИОЛ модели РСП-3, обеспечивающая стабильность анатомического положения ИОЛ при факоэмульсификации катаракты, сочетающейся с инволюционным подвывихом хрусталика первой степени, позволяющая минимизировать число спонтанных дислокаций комплекса «ИОЛ – капсульный мешок» в различные сроки послеоперационного периода факоэмульсификации. Книга рассчитана на врачей-офтальмологов, офтальмохирургов, интернов, клинических ординаторов, аспирантов.

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