According to one embodiment, a control assembly includes a post, a grip, and a hand rest. A common mode choke coil is installed between the power source line and the first and second resistor groups. The metering portion defines a metering hole axis, and the diffuser portion defines a trench. In another embodiment, the search assistant can be context sensitive so as to adapt to different types of media items. , \u201cpeoplepresenter\u201d or \u201cpeoplepresentervideo. In one embodiment, the system involves a pair of glasses that include filters that can be modified in the presence of light to reduce total light intensity reaching a diabetic’s eyes.