Abstract: A makeup application device comprising one or more lenses may be used for improved vision to help a person wearing the device to more easily apply makeup to the person's face. The device may include a head mount assembly for mounting the device on the person's head and one or more flexible arms for mounting the one or more lenses on the head mount assembly so that flexing of the arm or arms provides movement of the lens or lenses.

Abstract: A computer-implemented method detects the position of a corneal vertex of an eye from a frontal image of a head and a lateral image of the head. The front and lateral images are calibrated to one another, and the position of the corneal vertex in space is determined from the frontal image and the lateral image with a geometric position determination.

Abstract: A lens barrel assembly for use with a digital still camera includes an outer barrel having a front end and a rear end. An inner barrel is inserted in the outer barrel in an optical axis direction. The outer barrel moves forwards relative to the inner barrel, to shift between a short size position and a long size position, and when in the short size position, shifts from the inner barrel at a smallest shifting amount, and when in the long size position, shifts from the inner barrel at a largest shifting amount. A vent is formed in the outer barrel, and disposed close to the front end. A filter is water-impermeable and air-permeable, and secured to the vent in a closed manner. Also, a vent cover is secured to the outer barrel, for covering the vent.