[Evaluation of post intraocular lens implantation detrition of clear corneal incisions using an injector system in porcine eyes].
OBJECTIVE
To evaluate the detrition of clear corneal incisions (CCIs) after intraocular lens (IOL) implantation using an injector system in porcine eyes.


METHODS
Group A: after CCIs were performed with 1.8, 2.0, 2.2, 2.4, and 2.65 mm wide slit knives, a Y-60 H (HOYA) IOL was implanted in the anterior chamber using an injector system. Group B: after CCIs were performed with 2.4, 2.65, 2.8, 3.0, and 3.2 mm wide slit knives, a PY-60 R (HOYA) IOL was implanted in the anterior chamber using an injector system. Group C: after CCIs were performed with 2.8, 3.0, 3.2, 3.4 mm wide slit knives, a SN 60 AT (Alcon) IOL was implanted in the anterior chamber using an injector system.


METHODS
CCIs were performed with 3.0 mm wide slit knives. Each group used five porcine eyes for each slit knife (Group A 25 eyes; Group B 25 eyes; Group C 20 eyes; CONTROL 5 eyes). The detrition of the CCIs was evaluated on three different aspects using a scanning electron microscope: a) external expansion at both edges of CCIs; b) rupture of the collagen fibers; c) expansion between the collagen fibers. Aspects a, b and c were given a score of 0, 1, and 2, respectively, and the total points were compared statistically between test and control groups.


RESULTS
The degree of CCIs detrition was significantly reduced in CCIs with a width of more than 2.4 mm of CCIs width in Group A, more than 3.0 mm in Group B, and more than 3.2 mm in Group C.


CONCLUSIONS
Minimizing the detrition of corneal incisions after IOL implantation needs a larger than the recommended width of corneal incision.
Usui
Takahiro
T
Department of Ophthalmology, Showa University Fujigaoka Hospital, Japan.
Nishimura
Eiichi
E
Soda
Mitsutaka
M
Yaguchi
Shigeo
S
Oniki
Hiroaki
H
Nakano
Kiyoko
K
D000818:Animals; D003315:Cornea / Q000601:surgery* / Q000648:ultrastructure*; D019654:Lens Implantation, Intraocular / Q000379:methods*; D008855:Microscopy, Electron, Scanning; D013552:Swine