New caliper for small incision cataract surgery.
In cataract surgery, incision size determines various factors such as wound stability, corneal curvature changes, postoperative induced astigmatism, and visual rehabilitation. A mechanical caliper has been developed for experimental and clinical studies of incision sizes ranging between 1.0 and 6.0 mm. The caliper has a screw that allows measurements in 0.1 mm steps. The device is produced for two ranges: 2.0 to 4.0 mm and 1.0 to 6.0 mm. The precision of 0.1 mm was confirmed with a vernier caliper in a cadaver eye study. Unlike gauges that determine incision size by trial and error and a combined system of internal and vernier calipers, only one measurement is necessary with this caliper.
Kohnen
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Cullen Eye Institute, Baylor College of Medicine, Department of Ophthalmology, Houston, Texas, USA.
D001251:Astigmatism / Q000517:prevention & control; D002387:Cataract Extraction / Q000295:instrumentation*; D003315:Cornea / Q000033:anatomy & histology; D004867:Equipment Design; D006801:Humans; D007910:Lenses, Intraocular; D015203:Reproducibility of Results; D012826:Silicone Elastomers; D014945:Wound Healing
D012826:Silicone Elastomers