Anatomy of Human Crystalline Lens, Capsular Bag, Zonules and its Relevance to Cataract Surgery

2004 ◽  
pp. 3-3
Author(s):  
Suresh Pandey ◽  
David Apple ◽  
Liliana Werner ◽  
Vidushi Sharma
Keyword(s):  
Cataract Surgery ◽  
Crystalline Lens ◽  
Capsular Bag

scholarly journals Use of the chop hook to stabilize the capsular bag in patients with crystalline lens dislocations and cataracts

2017 ◽  
Vol 45 (2) ◽  
pp. 849-855
Author(s):  
Yanfeng Zeng ◽  
Licheng Fan ◽  
Peirong Lu
Keyword(s):  
Visual Acuity ◽  
Cataract Surgery ◽  
Anterior Chamber ◽  
Crystalline Lens ◽  
Cataract Operation ◽  
Intraocular Lens Implantation ◽  
Lens Dislocation ◽  
Lens Implantation ◽  
Capsular Bag

Objective To observe the treatment effects of chop hook-assisted phacoemulsification surgery in patients with crystalline lens dislocation. Methods Thirty-seven eyes with cataracts and crystalline lens dislocations underwent cataract surgery. An L-shaped chop hook was introduced into the anterior chamber, and the tip was pushed or pulled to the centre of the anterior capsular edge of the zonular dialysis during the cataract operation. Postoperative follow-up was conducted for ≥ 1 month. Results All patients’ postoperative visual abilities improved except one patient with glaucoma. One patient who underwent −5D intraocular lens implantation exhibited vision of 1/50. Visual acuity was less than 6/20 in 6 eyes, 6/20 to 10/20 in 7 eyes, and greater than 10/20 in 22 eyes. Conclusions L-shaped chop hooks can be used to push or pull the anterior capsular edge of the zonular dialysis for protection and avoidance of further zonular damage. This strategy provides satisfactory effects and reduces use of additional instruments.

scholarly journals Anterior Capsule Opening Contraction and Late Intraocular Lens Dislocation after Cataract Surgery in Patients with Weak or Partially Absent Zonular Support

Medicina ◽  
2021 ◽  
Vol 57 (1) ◽  
pp. 35
Author(s):  
Juris Vanags ◽  
Renārs Erts ◽  
Guna Laganovska
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Yttrium Aluminum Garnet ◽  
Late Complications ◽  
High Rate ◽  
Anterior Capsule ◽  
Capsular Tension Ring ◽  
Hydrophobic Acrylic ◽  
Capsular Bag

Background and objectives: To evaluate anterior capsule opening (ACO) contraction and late intraocular lens (IOL) dislocation after cataract surgery in patients with weak or partially absent zonular support and assess methods of reducing these complications. Materials and methods: For this prospective study, we enlisted cataract surgery patients in our hospital with preoperative diagnoses of weak zonules. All patients received phacoemulsification surgery with implantation of a hydrophobic acrylic IOL and capsular tension ring (CTR). ACO reductions were measured for six months after enrolment. Data on late IOL dislocations were collected five years after enrolment of the last patient. Results: Fifty-three patients were enrolled from 2011 to 2015. Over the six-month active follow-up period, ACO area reduction was 23% in patients receiving CTRs of 11 mm diameter and 8% for patients with CTRs of 12 mm, with an overall mean of 15% reduction. Five years after the last patient was enrolled, seven patients (13%) had experienced late IOL-CTR-capsular bag dislocation. For these patients, the mean ACO reduction in the first six months of follow-up was 33%, including for those who had received neodymium-doped yttrium aluminum garnet (Nd: YAG) anterior capsulotomies. Conclusion: Use of hydrophobic acrylic lenses and CTR reduces ACO contraction, with rates comparable to those after cataract surgery without ocular comorbidity. Our patients experienced a relatively high rate of late IOL-CTR-capsular bag dislocation. However, dislocated complexes were easily repositioned and few patients required IOL exchange. Frequent visits are warranted to promptly detect late complications of cataract surgery in patients with weak zonular support.

scholarly journals Crystalline Lens Staining with Intracameral Phenylephrine During Cataract Surgery

2021 ◽  
Author(s):  
Michael Tsatsos ◽  
Ioannis Athanasiadis ◽  
Corrado Gizzi ◽  
Marilita Moschos ◽  
Anant Sharma
Keyword(s):  
Cataract Surgery ◽  
Crystalline Lens ◽  
Photo Essay

This is a Photo Essay and does not have an abstract. Please download the PDF or view the article in HTML.

scholarly journals Long-Term Outcome of Cataract Surgery in Eyes with Pseudoexfoliation Syndrome Associated with Weak Zonules: A Case Report

2020 ◽  
Vol 11 (1) ◽  
pp. 54-59 ◽  
Author(s):  
Juris Vanags ◽  
Guna Laganovska
Keyword(s):  
Cataract Surgery ◽  
Yttrium Aluminum Garnet ◽  
Pseudoexfoliation Syndrome ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Capsular Tension Ring ◽  
Initial Surgery ◽  
Nd:Yag Laser Capsulotomy ◽  
The Right ◽  
Capsular Bag

A cataract surgery in both eyes was scheduled for an 81-year-old female patient. However, ophthalmic examination revealed marked iridodonesis, phacodonesis and pseudoexfoliative material on the surface of the lens in both eyes indicating weak zonules caused by pseudoexfoliation syndrome, which was more pronounced in the left eye. Cataract surgery was performed initially in the left eye by phacoemulsification. Additionally, iris hooks and capsular tension ring (CTR) were used to stabilize the capsular bag, and the haptic of the intraocular lens (IOL) was sutured to the iris at the end of the surgery. The same procedure except haptic suturing was performed in the right eye after 6 months. The left eye remained stable, whereas the right eye developed considerable anterior capsular contraction 2 months postoperatively. Neodymium-doped yttrium aluminum garnet (Nd:YAG) laser capsulotomy was performed to treat the condition. Moreover, 3 years after the initial surgery, late IOL-CTR-capsular-bag complex dislocation developed in the right eye, and reposition surgery was performed. Three days after IOL-CTR-capsular-bag complex reposition surgery, endophthalmitis developed; the eye responded well to 1 mg intravitreal vancomycin treatment. IOL in the right eye remained stable 3 years postoperatively.

scholarly journals Post-operative capsular opacification

1970 ◽  
Vol 1 (1) ◽  
pp. 43-59 ◽  
Author(s):  
SM Raj ◽  
AR Vasavada ◽  
SR Kaid Johar ◽  
VA Vasavada ◽  
VA Vasavada
Keyword(s):  
Clinical Studies ◽  
Experimental Studies ◽  
Surgical Techniques ◽  
Crystalline Lens ◽  
Posterior Capsular Opacification ◽  
Pharmacological Agents ◽  
Low Contrast ◽  
Physiological Consequence ◽  
Culture Models ◽  
Capsular Bag

Post-operative capsular opacification (PCO) is a multifactorial physiological consequence of cataract surgery. Opacification involving the central posterior capsule has a significant impact on high and low contrast acuity and low contrast sensitivity. The assessment of PCO on cadaver eyes, experimental studies and culture models and in clinical studies has provided an understanding of its pathogenesis. The proliferation, migration and abnormal differentiation of residual lens epithelial cells and fibers in the capsular bag have been implicated in the pathogenesis of PCO. The incidence and severity of PCO correlates to the use of surgical techniques, intraocular lens (IOL) optic edge designs and IOL materials. This article summarizes the clinical studies with recommendations for retarding the development of central PCO. It discusses experiments with pharmacological agents broadly categorized as anti-inflammatory, immuno-modulating, antiproliferative, antiadhering and antitransdifferentiating agents for the prevention of PCO. These studies will remain critical for future endeavors undertaken for the eradication of PCO. Key words: posterior capsular opacification; capsular opacification; cataract; crystalline lens; phacoemulsification DOI: 10.3126/nepjoph.v1i1.3673 Nep J Oph 2009;1(1):43-59

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.

Sign in / Sign up

Export Citation Format

Share Document