Route of Air in Anterior Chamber After Femtosecond Flap Creation

Sunday, April 19, 2015: 2:11 PM
Room 3 (San Diego Convention Center)
Swapna Nair, FRCS

To study the route taken by gas bubbles created during a femtosecond flap into the anterior chamber.

Patients who underwent femtosecond laser assisted flap creation with the Wavelight FS 200, resulting in the formation of gas bubbles in the anterior chamber were chosen. Frame by frame analysis of the femtosecond laser procedure from the starting of applanation to the appearance of bubbles was done to understand the sequence of events leading to air in anterior chamber.

The videographic analysis showed that air entering the venting canal passed peripherally into the limbal area in a circumferential manner followed by the appearance of bubbles in the peripheral anterior chamber towards the terminal phase of flap creation.

The route of passage of air is via the venting canal into the trabecular meshwork and thereafter into the anterior chamber.