The Optomap allows for a more comfortable retinal exam. Panoramic 200 Retinal Image - Click for hi resolution image. The top image to the right compares the doctor's view of your eye through an undilated pupil with an instrument called a direct ophthalmoscope (inner ring).
Mobile device. A mobile device (or handheld computer) is a computing device small enough to hold and operate in the hand. Typically, the device has a either flatscreen display with a small numeric keypad or alphanumeric keyboard, or a touchscreen providing a virtual keyboard and buttons (icons) on-screen.
A power semiconductor device is a semiconductor device used as a switch or rectifier in power electronics; a switch-mode power supply is an example.Such a device is also called a power device or, when used in an integrated circuit, a power IC. Intelligent digital power ICs came up in the last decade. power semiconductor device is usually used in commutation mode (i.e., it is either on or off), and therefore has a design optimized for such usage; it should usually not be used in linear operation.