Study of frequency and structure of secondary cataract formation with various types of interface «IOL –posterior lens capsule» in long term after phacoemulsification of senile cataract

Author(s):  
L. Bai ◽  
◽  
О.V. Kolenko ◽  
А.V. Vasiliev ◽  
А.V. Egorova ◽  
...  

Актуальность. Вторичная катаракта (ВК) является самым распространённым осложнением отдаленного послеоперационного периода факоэмульсификации (ФЭ). Один из факторов профилактики ВК – оптимальный интерфейс «интраокулярная линза – задняя капсула хрусталика» (ИОЛ – ЗКХ), так как полная адгезия вышеуказанных структур препятствует миграции эпителиальных клеток хрусталика c периферии ЗКХ в ее оптическую зону. Цель. Изучить частоту и структуру ВК при различных типах интерфейса «ИОЛ – ЗКХ» в отдаленные сроки после ФЭ возрастной катаракты. Материал и методы. Обследовано 416 пациентов (416 артифакичных глаз). Нами был исследован тип интерфейса «ИОЛ – ЗКХ» с помощью оптического когерентного томографа (RTVue-100, Optovue, США) с модулем для исследования переднего отрезка по протоколу Cornea Line и Cornea Cross Line через 1 и 2 года после операции, оценивали структуру и прозрачность ЗКХ. Результаты. Через 1 год после ФЭ различные помутнения ЗКХ были выявлены в 24 глазах (5,8%), через 2 года – в 62 глазах (14,9%). Наибольшее число помутнений ЗКХ отмечалось в глазах с отсутствием контакта или неполным контактом ИОЛ с ЗКХ, наименьшее – с полным контактом ИОЛ с ЗКХ. Выводы. Проведенные исследования показали, что частота и структура ВК в различные сроки после ФЭ зависит от типа интерфейса «ИОЛ – ЗКХ». Наименьшая частота формирования ВК через 2 года после ФЭ отмечена в артифакичных глазах с полным контактом ИОЛ с ЗКХ (3 глаза – 2,2%).

2017 ◽  
Vol 31 (9) ◽  
pp. 825-828 ◽  
Author(s):  
Rutveej Patel ◽  
Justin Dubin ◽  
Ephrem O. Olweny ◽  
Sammy E. Elsamra ◽  
Robert E. Weiss

Author(s):  
Paul J. Harasymowycz

During trabeculectomy, when a sclerostomy and iridectomy are performed, the structures immediately posterior to the iris, namely the zonules, lens capsule, ciliary processes, and anterior hyaloid face may be violated, resulting in a variety of intraoperative and postoperative complications. Lens injury, including cataract formation, and vitreous prolapse are 2 of the complications that may occur intraoperatively. Cataract formation is one of the most common occurrences after trabeculectomy, reported in approximately 50% of cases. While development of the cataract is usually a slow process, it occurs more frequently in patients with a history of diabetes, postoperative flat anterior chambers, or intraocular inflammation, as well as in a patient with a negative spherical equivalent (preoperative lens status) and pseudoexfoliation syndrome. Older age is a risk factor, since natural cataract development may be accelerated; however, cataracts may develop in up to 25% of younger (<55 years of age) patients undergoing trabeculectomy. The utilization of postoperative steroids has also been implicated in the development of posterior subcapsular opacities. Although not a common occurrence, cataracts may also develop soon after surgery due to direct intraoperative surgical trauma to the lens. If the opacity is focal and does not encroach on or obstruct the visual axis, no further action may be needed. If there is obvious rupture of the lens capsule causing clinically significant inflammation that may compromise bleb development, urgent lens extraction should be performed. If the clinical situation permits, it is desirable to wait at least 3 months until the bleb matures. Rapidly forming cataracts may also develop due to prolonged contact between the lens and the cornea, such as occurs intraoperatively if forceps inadvertently indent the cornea while retracting the conjunctiva during a limbus-based trabeculectomy. Similarly, the lens may opacify if the anterior chamber is flat for an extended period of time before the scleral flap sutures are adequately tied. Likewise, postoperative hypotony with a flat anterior chamber may lead to cataract formation (see Chapter 10).


1998 ◽  
Vol 77 (10) ◽  
pp. 846-851 ◽  
Author(s):  
Faruk Öztürk ◽  
Ali Vefa Yücetürk ◽  
Emin Kurt ◽  
H. Halis Ünlü ◽  
S. Sami Ilker

2020 ◽  
Vol 23 (4) ◽  
pp. 714-720
Author(s):  
Georgina M. Newbold ◽  
Thomas Chen ◽  
Daniel A. Ward ◽  
Diane V. H. Hendrix
Keyword(s):  

2019 ◽  
Vol 18 (2) ◽  
pp. 114-119
Author(s):  
A. B. Smirnova ◽  
B. S. Pershin ◽  
N. V. Myakova

Modern technologies of treatment of children with oncohaematological diseases allowed to noticebly increase the survival indexes in this group of patients, enhancing the value of maintenance of their life quality. More than half of those who received long-term steriod and radiation treatment develop cataract that causes decrease in vision. In this review we represent data concerning mechanisms of cataract formation in patients after steriod and radiation treatment, results of anatomical, physiological and biochemical studies of the lens as well as metabolic changes in aqueous humor leading to cataract formation.


Ophthalmology ◽  
1984 ◽  
Vol 91 (6) ◽  
pp. 596-602 ◽  
Author(s):  
Leo T. Chylack

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