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.
Input Devices. A large number of different devices are to allow users to give information, or input, to the computer. Text, numbers, sound, graphics, video, movement, heat, touch, etc., can all be entered using the correct device. 1. Keyboards. This is the main input device for desktop and laptop systems.