Purpose: To analyse the anterior lens capsule thickness and ultrastructure changes of intumescent white cataracts in comparison with nuclear cataracts to prove possible structural reasons for surgical difficulties with the intumescent white cataract.
Methods: Anterior lens capsules from 35 eyes with intumescent white and 35 eyes with nuclear cataracts were analysed for their thickness by semithin sections technique and for morphological characteristics by transmission electron microscopy.
Results: Capsule thickness was not significantly different in intumescent white compared to nuclear cataracts (mean values 17.5 and 18.5 μm, respectively, p = 0.369). The main morphological features of capsules were extrusions of capsule at the basement membrane-epithelial border embedding cellular material which were significantly more frequent in intumescent cataracts. Filaments in the basement membrane as well as rarefication of its structure and lamellae were often concomitant with the extrusions.
Conclusions: Anterior capsules of white intumescent cataracts do not differ in thickness but have different ultrastructure morphology compared to nuclear cataracts. The extrusions of basement membrane at the basement membrane-epithelial border towards epithelium, the filamentary inclusions within basement membrane and its rarefication could be the structural causes of tensile weakness and hence additional reason to surgical problems.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/j.1755-3768.2010.02102.x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
"Inverted flap rhexis" - Salvation of intumescence.
Indian J Ophthalmol
September 2024
Department of Cataract and IOL Services, Indira Gandhi Eye Hospital and Research Centre, Lucknow, Uttar Pradesh, India.
Intumescent cataract can be a challenge even for an experienced surgeon, particularly for creating a continuous curvilinear capsulorhexis (CCC) because of increased endolenticular pressure. CCC in white intumescent cataract is associated with increased risk of extension of rhexis margin leading to radial tear or biradial extension causing "Argentinian flag sign" and associated complications. We describe a novel technique for CCC, in which we manipulate the vector forces acting in creating a capsulorhexis.
View Article and Find Full Text PDFAutomated Capsular Decompression to Avoid Argentinian Flag Sign in Intumescent Cataract.
Clin Ophthalmol
July 2024
Department of Ophthalmology and Visual Sciences, Federal University of São Paulo (UNIFESP), São Paulo, São Paulo, Brazil.
Article Synopsis
- The study presents a new automated technique for cataract surgery to prevent the "Argentinian Flag sign," which can occur during capsulorhexis in intumescent cataracts, by using an insulin needle for simultaneous puncture and decompression of the capsular bag.
- Conducted at two medical facilities in São Paulo, Brazil, the prospective interventional study involved 88 patients with white or intumescent cataracts, utilizing standard surgical procedures and equipment.
- Results showed no complications, with a perfect 100% success rate for achieving a continuous and well-centered capsulorhexis in all cases.
Midperipheral mini-capsulorhexis as an additional step for safe phacoemulsification in white intumescent cataracts.
Indian J Ophthalmol
September 2024
Cornea and Anterior Segment Services, L J Eye Institute, Model Town, Ambala, Haryana, India.
The present article describes a novel surgical technique of a primary mini-capsulorhexis in midperiphery to minimize surgical complications in white intumescent cataracts. Patients with white mature cataracts with a convex anterior capsule or swollen lens fibers were selected. An initial puncture was made 3-4 mm away from the center, in the midperipheral anterior capsule, with a conventional cystitome.
View Article and Find Full Text PDFDouble peak sign on ultrasonography: A new prognostic marker before surgery for white cataract.
Indian J Ophthalmol
July 2024
Department of Ophthalmology, AIIMS, Bhubaneswar, Odisha, India.
A mature, hypermature, or white cataract needs posterior segment evaluation before surgery for prognostification. Ultrasonography is the preferred method for this. White cataract or intumescent cataract risks intraoperative capsulorhexis running out leading to devastating complications due to high intralenticular pressure.
View Article and Find Full Text PDFFlow capsulorhexis: A novel technique in white and hypermature cataracts.
Indian J Ophthalmol
January 2024
Cataract and Medical Retina Services, Sankara Eye Hospital, Sivanandapuram, Coimbatore, Tamil Nadu, India.
We described a novel "flow capsulorhexis" technique in white and hypermature cataracts and compared it with the standard "needle decompression capsulorhexis" technique. Six hundred and eight eyes of 420 patients with intumescent or non-intumescent mature white cataracts who had undergone phacoemulsification or manual small incision cataract surgery with "flow capsulorhexis" (Group 1) or "needle decompression capsulorhexis" (Group 2) were assessed. The mean continuous curvilinear capsulorhexis (CCC) completion time was 6.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!