scholarly journals Continuous Curvilinear Capsulorhexis in Cataract Surgery Using a Modified 3-Bend Cystotome

2015 ◽  
Vol 2015 ◽  
pp. 1-5
Author(s):  
Yuan Zeng ◽  
Jian-hua Gao
Keyword(s):  
Cataract Surgery ◽  
Anterior Chamber ◽  
Intraocular Lens ◽  
Completion Time ◽  
Anterior Chamber Depth ◽  
Corneal Edema ◽  
Group A ◽  
Capsular Rupture ◽  
Phacoemulsification Cataract Surgery ◽  
Capsular Bag

We modified a 2-bend cystotome for continuous curvilinear capsulorhexis (CCC) in manual or phacoemulsification cataract surgery to improve the safety and ease of performance. A 26G needle was converted into a cystotome with 3 bends. In this retrospective study, the performance of modified 3-bend cystotome was compared with conventional 2-bend cystotome. During cataract surgery, in the 3-bend cystotome group, mean completion time of CCC was shorter, mean times of viscoelastic agent supplement were less, and CCC success rate was higher than that in 2-bend group. Complication incidence, such as postoperative transient corneal edema and irreparable V-shaped tear, was also lower in 3-bend group. No posterior capsular rupture or no other complication was observed in either group. A polymethyl methacrylate intraocular lens or a hydrogel intraocular lens was implanted in the capsular bag in all eyes. We conclude that it is safe and efficient to accomplish a CCC using the 3-bend cystotome due to its ability to sustain the anterior chamber depth (ACD) and keep the posterior lip intact. Using the 3-bend cystotome also allowed for an adequate view into the anterior chamber from lack of wound deformation.

scholarly journals Progress in Modern Cataract Surgery – New Steps and Algorithms for Precise Measuring and Intraocular-lens Calculations

2017 ◽  
Vol 11 (02) ◽  
pp. 95
Author(s):  
Fritz H Hengerer ◽  
Gerd U Auffarth ◽  
Ina Conrad-Hengerer ◽  
◽  
◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Anterior Chamber ◽  
Intraocular Lens ◽  
Axial Length ◽  
Refractive Surgery ◽  
Anterior Chamber Depth ◽  
Corneal Surface ◽  
Intraocular Lens Calculations ◽  
Target Refraction ◽  
Intraocular Lens Calculation

In standard cataract surgery, one of the major goals is to reach target refraction. Based on keratometry measurements, axial length and anterior chamber depth, most of the intraocular lens calculation formulae are suitable to achieve this aim. Further evaluation of corneal refractive parameters like anterior and posterior corneal surface by Scheimpflug devices led to a significant enhancement of precision in astigmatic and post-refractive surgery cases.

scholarly journals The Effect of Scleral Sutured Intraocular Lens with Optic-haptic Junction Fixation in the Capsular Bag

2021 ◽  
Vol 62 (9) ◽  
pp. 1172-1180
Author(s):  
Sun Young Lee ◽  
Yang Kyung Cho
Keyword(s):  
Anterior Chamber ◽  
Intraocular Lens ◽  
Anterior Chamber Depth ◽  
Fixation Method ◽  
Scleral Fixation ◽  
Sulcus Fixation ◽  
Refractive Change ◽  
The Stability ◽  
Target Refraction ◽  
Capsular Bag

Purpose: To compare the stability of intraocular lens (IOL) insertion methods of sutured haptics in the bag with scleral fixation to those of in the bag insertion and scleral sulcus fixation. Methods: In group of only phacodonesis, two IOL insertion methods, in the bag insertion and sutured haptics in the bag with scleral fixation were compared. In group of phacodonesis with less than 90° zonulysis, two IOL insertion methods, sutured haptics in the bag with scleral fixation and scleral sulcus fixation were compared. Postoperative 2 months and 12 months refraction were compared with target refraction and the refractive change between postoperative 2 and 12 months were compared in each group. The change of anterior chamber depth (ACD) at postoperative 2 and 12 months were compared with preoperative ACD, and the change of ACD between postoperative 2 and 12 months were compared in each group. Results: In group of only phacodonesis, the typical in the bag insertion group showed significant ACD change between postoperative 2 and 12 months (p = 0.010), but the group of sutured haptics in the bag with scleral fixation didn’t show the significant ACD change (p = 0.515). In group of phacodonesis with less than 90° zonulysis, the sulcus scleral fixation method showed significant ACD change and significant refractive change (p = 0.015, p = 0.004), but the group of sutured haptics in the bag with scleral fixation method didn’t show the significant ACD nor refractive change (p = 0.713, p = 0.106) between postoperative 2 and 12 months. Conclusions: In eyes with zonular instability, sutured haptics in the bag with scleral fixation method can promote the postoperative stability of IOL.

Remnant Extraction by Using an Intraocular Lens Injector with Essential Flow

2017 ◽  
Vol 27 (4) ◽  
pp. 509-511 ◽  
Author(s):  
Momoko Yamakawa ◽  
Mami Kusaka ◽  
Shogo Yamada ◽  
Masayuki Akimoto
Keyword(s):  
Cataract Surgery ◽  
Anterior Chamber ◽  
Intraocular Lens ◽  
New Technique ◽  
Passive Flow ◽  
Incision Size ◽  
A New Technique ◽  
Capsular Rupture ◽  
Soemmering Ring ◽  
Residual Fragments

Purpose To describe a new technique for remnant removal in cases of posterior capsular rupture during cataract surgery and Soemmering ring extraction during intraocular lens (IOL) removal. Methods An IOL injector, inserted into the anterior chamber, provides a new exit for residual lens fragments. Passive fluid flow, supplied by an anterior chamber maintainer or some ocular viscoelastic device (OVD) injection, delivers the residual fragments into a lumen of the injector in assistance with a second device such as a phaco-chopper and vitreous cutter. Results Soemmering rings can be removed safely through small incisions even when under the iris. Nucleus fragments in anterior chamber can be removed safely. Fragments that fall into the vitreous cavity can float up for removal by passive flow. Conclusions This new technique, remnant extraction through lens injector with essential flow, has several practical advantages over existing methods including reduced OVD injection and smaller incision size. It may offer an alternative to existing methods of remnant removal in cases of posterior capsular rupture during cataract surgery and Soemmering ring extraction.

scholarly journals Intra-operative and Immediate Post-operative Complications in a High Volume Cataract Surgery Center

2020 ◽  
Vol 36 (4) ◽  
Author(s):  
Muhammad Ali Haider ◽  
Uzma Sattar ◽  
Muhammad Amjad
Keyword(s):  
Cataract Surgery ◽  
Anterior Chamber ◽  
Tertiary Care ◽  
Corneal Edema ◽  
High Volume ◽  
Ocular Lens ◽  
Operative Complications ◽  
Quasi Experimental ◽  
Capsular Rupture ◽  
Post Operative Complications

Purpose:  To find out the frequency of complications in a high volume phacoemulsification set up at a tertiary care eye hospital in Lahore. Study Design:  Quasi experimental study. Place and Duration of Study:  Al-Ehsan Eye Hospital, Lahore, from July 2017 to June 2019. Methods:  Surgical outcomes of 6902 patients who had undergone phacoemulsification were included. Patients were excluded if they had ocular infections, lid margin diseases, adnexal diseases, those requiring a secondary anterior chamber surgery and those unfit for the procedure due to medical grounds. Every patient underwent a detailed history and complete clinical examination. All patients underwent the standard phacoemulsification technique and at the end of each surgery, subconjunctival injections of dexamethasone and gentamycin were given to the patients. Complications encountered during high volume cataract surgery were recorded and their percentages were calculated. Results:  A total of 6902 patients underwent cataract surgery with 2.66% intra-operative and 6.94% immediate post-operative complications. The most common intra-operative complication was posterior capsular rupture (1.15%).  In patients with capsular rupture the intra ocular lens was implanted within the sulcus in 61 cases (0.88%) while in 12 cases (0.17%) anterior chamber lens was implanted because of lack of capsular support. During the surgery intra ocular lens could not be implanted in 7 cases (0.10%) and they were left aphakic. The commonest immediate post-operative adverse outcome was corneal edema with striate keratopathy and decements folds in 197 cases (2.85%). Conclusion:  High volume cataract surgery using appropriate techniques and sterilization does not compromise the quality of outcomes. Key Words:  Cataract, Phacoemulsification, Vitreous loss.

scholarly journals A comparative analysis of morphometric changes in the angle of anterior chamber after cataract surgery

2021 ◽  
Vol 9 (8) ◽  
pp. 2296
Author(s):  
Mahsa Jamil ◽  
Anupam . ◽  
Ramanuj Samanta ◽  
Sanjeev Kumar Mittal
Keyword(s):  
Cataract Surgery ◽  
Anterior Chamber ◽  
Anterior Chamber Depth ◽  
Cataract Extraction ◽  
Anterior Chamber Angle ◽  
Small Incision Cataract Surgery ◽  
Common Causes ◽  
Quasi Experimental ◽  
Group A ◽  
Group B

Background: Cataract surgery brings about certain changes in the angle of anterior chamber and we aimed at understanding the morphometric changes occurring in the angle at the site of incision (SOI) and the site opposite to it (OSOI) after two types of cataract surgeries viz. phacoemulsification and manual small incision cataract surgery (SICS) at two postoperative follow-ups.Methods: A quasi-experimental study was conducted at AIIMS, Rishikesh and a minimum of 60 patients were enrolled. They were divided into two groups based on the surgery performed, 30 patients had undergone phacoemulsification (group A) and 30 patients had undergone SICS (group B). The patients were evaluated using optical coherence tomography (OCT), the parameters measured were central anterior chamber depth (ACD), anterior chamber angle (ACA), angle opening distance (AOD), and trabecular iris surface area (TISA). The subjects were assessed preoperatively, post-operatively at 1 week and 6 weeks.Results: The increase in the angle parameters at 1 week and 6 weeks post-operatively was found to be statistically significant in the two groups (p<0.05). The increase in the parameters was also compared between the two surgeries and was found to have no statistical difference.Conclusions: We were able to conclude that a simple cataract extraction can help treat two most common causes of blindness, cataract and glaucoma and the technique of cataract surgery used does not influence the change brought about in the angle.

scholarly journals Intraoperative Posterior Chamber Irrigation to Enhance Vitreous Cavity Support during Phacoemulsification Cataract Surgery after Vitrectomy

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Jiao Lyu ◽  
Peiquan Zhao
Keyword(s):  
Cataract Surgery ◽  
Anterior Chamber ◽  
Anterior Chamber Depth ◽  
Vitreous Cavity ◽  
Chamber Pressure ◽  
Posterior Chamber ◽  
Cavity Pressure ◽  
Corneal Incision ◽  
Phacoemulsification Cataract Surgery

Purpose. To report the effectiveness of an intraoperative posterior chamber irrigation technique to enhance vitreous cavity support during postvitrectomy phacoemulsification cataract surgery. Methods. The irrigation technique was performed during phacoemulsification cataract surgery on 10 postvitrectomy eyes (9 patients) with moderate or hard density cataracts and with low vitreous cavity support. A cohesive viscoelastic tamponade was applied to pressurize the anterior chamber to start the procedure. The vitreous cavity was then irrigated using a 26-gauge flushing cannula injecting balanced salt solution under the iris through the zonules, until the vitreous cavity pressure balanced and exceeded the anterior chamber pressure and viscoelastic flowed out from the corneal incision. Intraoperative performance with the irrigation technique, postoperative visual acuity, and anatomy, and complications were retrospectively evaluated. Results. The irrigation procedure instantly enhanced posterior segment pressure before capsulorhexis in 4 eyes, before phacoemulsification in 4 eyes, after phacoemulsification in 2 eyes, before intraocular lens implantation in 6 eyes, and after implantation in 3 eyes. Phacoemulsification cataract surgery was facilitated by the irrigation technique, with a stabilized anterior chamber and robust vitreous cavity support. No complications occurred intraoperatively and postoperatively. At a 3-month follow-up, favorable visual and anatomic outcomes were achieved in all eyes. Conclusions. The irrigation technique balanced the pressure of anterior and posterior segments. Thus, vitreous cavity support and anterior chamber depth were well stabilized during phacoemulsification cataract surgery in postvitrectomy eyes.

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