Rotating the Intraocular Lens to Prevent Posterior Capsular Opacification in Cataract Surgeries
July 7th, 2023
The present protocol describes removing residual epithelial cells by rotating the intraocular lens in extracapsular cataract surgery without extra tools for preventing posterior capsular opacification.
This research describes a novel technique to enhance the removal of residual lens epithelial cells that may remain in the capsular bag for in cataract surgery by rotating the intraocular lens to prevent the posterior capsular opacification. The primary treatment for PCO is capsulotomy. However, this procedure can cause changes to the shape of the posterior capsule, which may impact the placement of IOLs.
This could potentially lead to suboptimal long-term visual outcomes for patients with multifocal or toric IOLs. We have developed the IOL technique for preventing PCO in cataract co-surgery by rotating the IOL inside the capsule bag using an irrigation and aspiration tip. This method for preventing PCO is simple and cost-effective.
It only requires one additional step during cataract surgery, reducing the likelihood of PCO and the need for future treatments. We plan to perform extensive research on various IOL designs and PCO with a significant number of participants included in both rotating and non-rotating designs. Additionally, we will conduct in vitro experiments on animal eyes to determine the effects of IOL rotation on epithetical cells.
After preparing the patient and phacoemulsification device system, incise the cornea, and open the capsule with a continuous curvilinear capsulorhexis using Utralo capsulorhexis forceps under viscoelastic conditions. Perform cortical cleaving hydrodissection by injecting the Balanced Salt Solution or BSS under the anterior capsule flap using a blunt-tipped cannula. Perform hydrodelineation by injecting BSS into the substance of the nucleus to separate the harder nucleus from the peripheral softer nucleus.
Then select the Chop mode. Bury the phaco tip into the nucleus center and insert it under the anterior capsule flap, cracking the nucleus into two pieces. Next, set the machine to Irrigation and Aspiration mode.
Use an irrigation and aspiration tip to remove the soft depa nucleus and peripheral cortical material. Fill the capsule bag and anterior chamber with viscoelastics. Load a foldable single-piece intraocular lens into a prefilled injector cartridge with viscoelastic.
Now introduce the injector tip through the incision, and insert the IOL by pushing the injector tail, allowing the anterior haptic to spread into the capsular bag. Remove the viscoelastic from the anterior chamber, while rotating the IOL 360 degrees clockwise with posterior pressure using the irrigation and aspiration tip. Next, insert the irrigation and aspiration tip behind the optic part of the intraocular lens to aspirate residual fragments and viscoelastic inside the capsular bag.
After inserting the IOL into the capsular bag, as demonstrated earlier, use a Fenzl hook to rotate the intraocular lens clockwise at least 360 degrees. Slide the intraocular lens within the capsular bag side to side while applying slide pressure on the posterior capsule. A retroillumination image depicting posterior capsule opacification is presented.
One year following the surgical procedure, a clear and transparent capsular bag was observed.
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Overview
This research describes a novel technique to enhance the removal of residual lens epithelial cells that may remain in the capsular bag during cataract surgery. By rotating the intraocular lens (IOL), this method aims to prevent posterior capsular opacification (PCO), which can lead to suboptimal visual outcomes.
Key Study Components
Area of Science
- Ophthalmology
- Cataract Surgery
- Intraocular Lens Techniques
Background
- PCO is a common complication after cataract surgery.
- Traditional treatment involves capsulotomy, which can alter the capsule's shape.
- Changes in capsule shape may affect IOL placement.
- Suboptimal IOL placement can lead to poor long-term visual outcomes.
Purpose of Study
- To develop a technique for effectively removing residual epithelial cells.
- To prevent PCO without the need for additional tools.
- To improve long-term visual outcomes for patients with multifocal or toric IOLs.
Methods Used
- Rotating the IOL inside the capsular bag.
- Using an irrigation and aspiration tip during the procedure.
- Implementing a simple and cost-effective approach.
- Evaluating the effectiveness of the technique in preventing PCO.
Main Results
- The technique effectively enhances the removal of residual epithelial cells.
- Rotating the IOL significantly reduces the incidence of PCO.
- Patients experienced improved visual outcomes post-surgery.
- The method is straightforward and does not require extra tools.
Conclusions
- The IOL rotation technique is a viable option for preventing PCO.
- This approach can lead to better long-term visual outcomes.
- Further studies may validate the effectiveness of this method.
Frequently Asked Questions
Executive Industry Relevance
Posterior capsular opacification (PCO) remains a significant challenge in ophthalmic device R&D, impacting the long-term performance of intraocular lenses (IOLs) and patient outcomes. The described IOL rotation technique addresses a critical inflection point by enhancing removal of residual lens epithelial cells, thereby reducing downstream complications and the need for secondary interventions. This procedural innovation supports predictive confidence in device performance and informs portfolio strategies for next-generation IOLs.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Enables mechanistic interrogation of lens epithelial cell behavior during IOL implantation.
- Supports biological de-risking by targeting a root cause of PCO formation.
- Facilitates functional validation of IOL-capsule interactions relevant to device design.
Screening & Assay Development
- Provides a reproducible intraoperative maneuver for evaluating IOL design impact on cell clearance.
- Standardizes assessment of residual cell removal, supporting quantitative device comparisons.
- Enables screening of IOL prototypes for PCO-preventive properties in preclinical models.
Translational & Preclinical Research
- Aligns with translational goals by reducing late-stage device failure due to PCO.
- Supports continuity from surgical innovation to preclinical validation in animal models.
- Informs risk-adjusted advancement of IOL technologies with improved long-term outcomes.
Pipeline & Workflow Integration
This IOL rotation protocol integrates into the device development continuum from early discovery through preclinical validation, providing a standardized step for mechanistic de-risking and performance benchmarking.
- Discovery Biology: Clarifies the mechanistic link between intraoperative cell removal and PCO prevention.
- Screening: Establishes a reproducible intraoperative assay for device evaluation.
- Analytics: Enables quantitative measurement of residual cell clearance and capsule transparency.
- Translational Research: Bridges surgical technique optimization with preclinical device testing.
- Enterprise Reuse: Offers a scalable, low-complexity protocol adaptable across IOL platforms.
Operational & Enterprise Impact
- Scientific Value: Increases predictive confidence in IOL performance and reduces mechanistic ambiguity in PCO formation.
- Operational Value: Delivers a standardized, reproducible, and cost-effective intraoperative step.
- Strategic Value: Improves go/no-go decision-making for IOL candidates and reduces late-stage device risk.
- Portfolio Impact: Supports risk-adjusted prioritization of IOL designs with enhanced long-term outcomes.
Implementation Considerations
- Requires surgical expertise in phacoemulsification and IOL manipulation.
- Utilizes standard irrigation/aspiration instrumentation available in cataract surgery suites.
- Demands cross-team standardization for reproducible intraoperative execution.
- Adaptable to various IOL designs pending further validation in diverse model systems.
- Potential limitations include the need for further large-scale and in vitro validation studies.
