Guy Kleinmann Kaplan Medical Center, Rehovot, Israel Financial disclosure: Dr. Kleinmann is a consultant for Hanita Lenses, Israel.

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Presentation transcript:

Guy Kleinmann Kaplan Medical Center, Rehovot, Israel Financial disclosure: Dr. Kleinmann is a consultant for Hanita Lenses, Israel

 Encouraging PCO prevention results for both hydrophilic and hydrophobic ring materials  No significant difference between hydrophilic and hydrophobic IOLs  Our results suggested primary PCO prevention due to inhibition of Soemmering’s ring formation indicating suppression of cell proliferation and not only a mechanical blockage Animal trial (prototype) Cadaver trial (customization for human eye) Animal trial (final design) Human trial

 Ring diameter of 9.5 mm was found to fit all capsular bag sizes of eyes tested with no ovalization or deformation  Future steps: To simplify the insertion of the IOL haptics into the ring groove Animal trial (prototype) Cadaver trial (customization for human eye) Animal trial (final design) Human trial

1. Do the side windows assist in PCO prevention? The windows induce fluid flow, however function as a passage for the cells. 2. What wall geometry will be more efficient in PCO prevention - vertical or round? 3. How to simplify the insertion of the IOL haptics into the ring groove? Animal trial (prototype) Cadaver trial (customization for human eye) Animal trial (final design) Human trial

- Vertical wall for capsular bend enhancement - Extensions for IOL positioning - Windows for fluid flow Design 1Design 2Design 3 - Vertical wall for capsular bend enhancement - Extensions for IOL positioning - Round wall for capsular adhesion -No posterior rim for easing the IOL positioning

Previous design Current designs  Outer diameter: 11 mm  Wall height: 1.5 mm  Outer diameter: 10.5 mm  Wall height: 1.7 mm

 18 NZW rabbit eyes were divided into three groups and implanted, after lens removal, as following:  Tested groups were compared to control group of previous study (same study setting, rabbit species, rabbit age and weight): IOLRingN (eyes) SeeLens AFDesign 17Group 1 SeeLens AFDesign 27Group 2 SeeLens AFDesign 37Group 3 IOLRingN (eyes) SeeLens AF-6Control

 Following tests were performed:  Slit Lamp and Miyake Apple evaluation at 6 weeks  Histopathological evaluation (ongoing)

 Implantation of the ring still requires manipulations, and is to be optimized  Insertion of IOL haptics into the ring groove was easy in all designs  In design 3 the IOL was more prone to tilt due to the absence of the posterior rim  In designs 1 and 2 the extensions are to be elongated to eliminate risk of IOL misalignment

Average PCO score: 1.43 Average PCO score: 0.67 Average PCO score: 1.43 Average PCO score: 3.25 Control group

Control group

Eye 8R

Eye 10L

Eye 11R

Eye 12L

Eye 9L

Eye 8L

 Ring of design 1 was proven to be most effective in prevention of PCO  Soemmering ring protrusions were observed in histology and the slit lamp imaging, however were not observed in Miyake-Apple view.

1. The side windows were proven to assist in prevention of PCO 2. No significant difference was seen between vertical and circular wall designs 3. The problem of insertion of IOL into the ring groove was successfully resolved, however the implantation of the ring is still to be optimized