Modified ERG-Jet™ contact lens electrodes for use in infants and toddlers-update.
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PURPOSE: To describe recent changes in the dimensions of the ERG-jet contact lens electrode, and to suggest corresponding changes in the dimensions of cylindrical stents to facilitate the use of ERG-jet contact lens electrodes in infants and small children.METHODS: Upon the observation that existing cylindrical stents no longer fit newly purchased ERG-jet contact lenses, the spacings between the “bumps” on the front surface of old and new electrodes were measured with calipers, and prototype stents were newly machined from acrylic plastic.RESULTS: Cylindrical stents with an outside diameter of 0.277 inches (about 7.04 mm) were found to fit snugly between the front surface “bumps” of new ERG-jet contact lens electrodes.CONCLUSIONS: Recent modifications in the injection molds for ERG-jet contact lens electrodes have resulted in an increase in the space between the “bumps” on the front surface of the electrodes, necessitating a corresponding increase in the outside diameter of cylindrical stents intended to fit snugly between the “bumps” for ease of insertion and prevention of lid closure.
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Cylindrical stents;ERG;ERG electrodes;ERG-Jet™ contact lens electrodes
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