Purpose: To evaluate the effect of age, size, position, and species on the strength of minicapsulorhexes. Setting: Surgical Suite and Laser Laboratory, Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida, USA. Methods: Capsulorhexes 0.7 to 2.3 mm in diameter were made centrally or peripherally in 35 eye-bank eyes and 32 rabbit eyes. A custom-made instrument stretched the capsulorhexes until rupture. Load and stretch at rupture were recorded. Results: Maximum load and stretch were 26.3 mN ± 20.3 (SD) and 50% ± 18% for central and 50.8 ± 20.5 mN and 69% ± 17% for peripheral capsulorhexes in eye-bank eyes and 19.8 ± 15.2 mN and 38% ± 13% for central and 13.5 ± 9.5 mN and 30% ± 7% for peripheral capsulorhexes in rabbit eyes. Peripheral capsulorhexes were stronger and more elastic than central capsulorhexes in eye-bank eyes, and maximum load and stretch increased statistically with the capsulorhexis diameter. Conclusions: Peripheral minicapsulorhexes were more resistant to rupture than central capsulorhexes in eye-bank eyes, probably because of increased lens capsule thickness at the periphery. An increase in capsulorhexis diameter increased the resistance to rupture.
ASJC Scopus subject areas
- Sensory Systems