Video is processed based on the color content of a video frame. In one embodiment, a four-bit shift register is configured in a ring and preset with a data pattern. A component of the molecule is removed from the layer to form openings extending into the layer. Furthermore, an image of the fundus of the eye to be examined is sensed by a sensing switch being pushed after the completion of focus adjustment. The bypass module can provide control for the motor even when the variable frequency drive module is removed from the drive control assembly. The nanoparticles are characterized with a positive surface charge and their enhanced permeability for paracellular drug delivery.