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).
Medical devices are classified into Class I, II, and III. Regulatory control increases from Class I to Class III. The device classification regulation defines the regulatory requirements for a general device type. Most Class I devices are exempt from Premarket Notification 510(k); most Class II devices require Premarket Notification 510(k); and most Class III devices require Premarket Approval.
Keyboard. 1  is an input device that enables the user to enter characters (letters, numbers and symbols) into a computer. 2  is a hand held pointing device that is classed as a manual input device. 3  is an input device which is mostly used for playing computer games such as flight simulators.