New Toric Devices to Mark Narrow Lid Eyes
Narrative Responses:
Purpose
To develop new toric marking devices which can be used easily for the eyes with narrow lids and deep set small eyes.
Methods
A reference marker with an electronic level was made to mark 0 and 180 degree positions. Tilting of the device is notified by five LED lights and beeping sound. According to the angle of tilting, red or orange LED will light with frequent or less frequent beeping sound. The sensitivity of the device can be adjusted by 5 steps with the maximum accuracy of 0.2 degrees. After opening the lids with a speculum, the final axis will be marked with a new intraoperative marker which has a diameter of 10mm to place on the cornea easily even in the narrow lid cases.
Results
As the marking blades are long and bent properly, it can easily reach the limbus to make reference marks quite easily. As the sound and light indicate the horizontal position, the surgeon can concentrate on the patient’s eye without any need of paying attention to the unstable air bubble in the tube. Contrary to the conventional ring shaped intraoperative axis gauge which was placed on the limbus, the new axis gauges were designed much smaller to place on the cornea that the final axis marking was easily attained even in small or narrow lids cases.
Conclusion
The electronic reference marker attained precise and easy reference marking. By combination of the electronic reference marker and the new intraoperative axis marker, accurate axis marking can be attained easily in the narrow lids and deep set eyes.