[Corneal topographic alteration after radiofrequency application to an animal model].
OBJECTIVE
To verify the topographical alterations in enucleated pig eye cornea after radiofrequency application.


METHODS
A prototype radiofrequency modulator with 10 different energy possibilities was used. For each energy we used 10 enucleated pig eyes that were topographed before and after applying radiofrequency, following a nomogram with 8 spots in step one, 16 spots in step 2, and 24 spots in step 3, in a total of 3 steps for each eye, 300 applications and 400 topographies.


RESULTS
Corneal curvature variation occurred after radiofrequency applications for all utilized selections, demonstrated by the mean variation of initial KM (minimum dioptry) and final KM (35.78 and 37.37 respectively) with 1.59 dioptries of variation (p<0.001). The energy that demonstrated more stability was 0.625 W/s (65 degrees C).


CONCLUSIONS
The obtained topographic values demonstrated that the central corneal curvature increased after radiofrequency application, and the higher the energy and the more spots used, more curved became the cornea, despite homogeneity.
Paulino
Leonardo Verri
LV
Departamento de Oftalmologia, Faculdade de Medicina do ABC, Santo André, SP. leonardovpaulino@hotmail.com
Paulino
Eduardo
E
Barros
Rodrigo Andrade de
RA
Salles
Alvaro Gonçalves de
AG
Rehder
José Ricardo Carvalho Lima
JR
D000818:Animals; D003315:Cornea / Q000503:physiopathology / Q000528:radiation effects*; D019781:Corneal Topography; D004195:Disease Models, Animal; D015353:Eye Enucleation; D000078702:Radiofrequency Therapy; D012030:Refractive Errors / Q000628:therapy*; D013552:Swine; D016896:Treatment Outcome