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  Indian J Med Microbiol
 

Figure 4: (a) Preoperative limbal marking with the Ganesh bubble marker (Epsilon Surgical, Chino, CA, USA). This instrument uses three marks on the limbus at 0°, 90°, and 180°, extending 2 mm toward the center of the cornea, which are easy to visualize while the eye is being docked. (b) Method of manual cyclotorsion compensation by a gentle rotation of the cone while holding the same at the attachment of the tube to the cone. (c) Position of the limbal marks (red arrows) under suction “ON” condition without cyclotorsion compensation before starting the laser, showing approximately 12° of cyclotorsion. (d) Final position of the limbal marks after manual compensation of the cyclotorsion error (alignment with the horizontal axis of the eyepiece reticule). Delivery of the laser follows this (reproduced after permission from Journal of Refractive Surgery)

Figure 4: (a) Preoperative limbal marking with the Ganesh bubble marker (Epsilon Surgical, Chino, CA, USA). This instrument uses three marks on the limbus at 0°, 90°, and 180°, extending 2 mm toward the center of the cornea, which are easy to visualize while the eye is being docked. (b) Method of manual cyclotorsion compensation by a gentle rotation of the cone while holding the same at the attachment of the tube to the cone. (c) Position of the limbal marks (red arrows) under suction “ON” condition without cyclotorsion compensation before starting the laser, showing approximately 12° of cyclotorsion. (d) Final position of the limbal marks after manual compensation of the cyclotorsion error (alignment with the horizontal axis of the eyepiece reticule). Delivery of the laser follows this (reproduced after permission from Journal of Refractive Surgery)