torsional fibrosis in the anterior capsule following lens implantation
DESCRIPTION
Torsional fibrosis in the anterior capsule following lens implantation. Kavita Gala David Spalton James Boyce Anish Dhital ST THOMAS’S HOSPITAL, LONDON No financial or proprietary interest No financial or proprietary interest. INTRODUCTION. - PowerPoint PPT PresentationTRANSCRIPT
Kavita GalaDavid SpaltonJames BoyceAnish Dhital
ST THOMAS’S HOSPITAL, LONDON
No financial or proprietary interest
No financial or proprietary interest
INTRODUCTION
• Torsional fibrotic changes are sometimes seen in the anterior capsule following lens implantation
• Typically, these have a clockwise spiralling appearance
AIM
To study the evolution of spiralling changes and analyze their relation to patient factors
METHODS
• Retrospective study
• Screened 5000 images from our database of retroillumination images for eyes with typical spiralling
• The sequences of the images for each eye obtained
• For every image, the next non spiralling image from the database taken as control
• Images of the other eye extracted
METHODS • Changes in spiralling over time observed
• POCO software used to measure PCO
• POCOman software used to measure rhexis area
IOL power Capsulorrhexis size PCO percentage at 2 years
Compared to control eyes
Spiralling example 1PHP 22.0 SN60WF OD
3 MTHS
1 yr 2 YRS
3 YRS
Spiralling example 2BAB 22.5 Tecnis ZM001 OD
1 MTH
6 MTHS 3 YRS
3 YRS
Control eye exampleATO 23.5 OS SN60WF
1 MTH
3 MTHS
2 YRS
1 YR
RESULTS
0
2
4
6
8
10
12
14
16
spiralling
control
IOL distribution in each group
RESULTSAVERAGE SPIRALLING
GROUPCONTROL GROUP P VALUE
OD:OS 16:8 12:12 ns
PCO (% area) 3.92 ± 5.83 2.19 ± 3.13 ns
Rhexis diameter (mm)
4.14 ± 1.910 4.98 ± 2.36 <0.0001
IOL Power 21.260 ± 2.918 20.670 ± 2.319 ns
CONCLUSION
• Spiralling changes are caused due to torsional forces induced while dialling the lens into the bag due to the IOL binding with the bag
• Spiralling appears to be induced at surgery and then remains unchanged
• These changes are more commonly seen with a smaller rhexis- presumably because there is more contact between IOL and the bag.