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).
An Android device is a device that runs on the Android operating system. Android is an array of software intended for mobile devices that features an operating system, core applications and middleware. An Android device may be a smartphone, tablet PC, e-book reader or any type of mobile device that requires an OS. Android is developed by the Open Handset Alliance, which is led by Google.
Any number of computer peripherals can be classified as input devices. An input device is simply something that is used to interact with, or provide data to, the computer, as opposed to an output device that displays data for the user. Everyone that has used a computer has also used an input device, such as a keyboard or mouse. Without input devices, there would be no way to interact with computers. The most common input devices are the mouse and keyboard. However, joysticks, touch screens, webcams, and microphones are considered input devices as well.