Communication orale ASCRS

23 mai 2013

San Francisco

During the first two months of this ongoing study, 15 eyes of 13 consecutive patients with a corneal astigmatism greater than 1.25 diopters were operated. Surgeries were performed in a single center (Cochin Hospital), by two surgeons using a 2.2 mm wound phacoemulsification. The toric cylinders available were 1.25, 2 or 2.75 diopters. The purpose of the study was quite simple : to assess the ease of use of this new toric lens, its refractive results and rotational stability at 8 days and one month.

The lens was the MX60 Envista Toric by Bausch & Lomb® : a hydrophobic white lens with a 6 mm optic.

The day of surgery, the eyes were marked with a bubble marker showing the horizontal axis (0-180°), and the recognition system used during the surgery for the lens alignment was the Callisto system® by Zeiss®.

At the follow-ups, we used a method very clearly discribed in a recent JCRS article (Popp N, Evaluation of 4 corneal astigmatic marking methods, JCRS dec 2012), based on the alignment of the Purkinje reflexes at the same height at slit-lamp, to get a good horizontal position of the head before measuring the axis.

Once the head was properly positionned, we used the graduation of the slit-lamp to assess precisely the axis of the lens, as represented on the pictures below.