Our device had better cleaning ability than that of gauze wiping.

<p>A. Representative endoscopic views: the upper panel shows the image after cleaning the contaminated lens with gauze, and the lower panel shows the contaminated lens after cleaning with the device. B. Luminescence evaluation of residual contaminants on the lens after cleaning by gauze and by the device.</p

Accumulation of contaminants on the lens surface after repeated cleaning.

<p>Three wipes with gauze or one cleaning pass by using our device were performed repeatedly.</p

Washing effectiveness of the gauze and device.

<p>A. Representative images of the endoscopic view after repeated cleaning of the contaminated lens after gauze wiping. B. Representative images of the endoscopic view after repeated cleaning of the contaminated lens according to the number of device cleaning. C. Luminescence evaluation of residual contaminants on the lens after cleaning according to the number of cleaning by gauze and the device.</p

Mechanism and structure of our novel lens cleaning device.

<p>A. Appearance. B. Manipulation techniques for lens cleaning started by covering the air hole with a finger. C. Schema of the device. The left panel shows that the air runs through the device without covering the hole with a finger, the middle panel shows the water cleaning initiated by air-hole covering with finger and scope, and the right panel shows that water drops on the lens surface after cleaning are removed by air aspiration through the air hole.</p