lens. 1  a piece of glass, or other transparent substance, with two curved surfaces, or one plane and one curved, regularly bringing together or spreading rays of light passing through it: a lens or combination of lenses is used in optical instruments, eyeglasses, etc. to form an image.ens-Computer Definition. The glass or plastic elements that focus light onto analog film or a digital sensor in a still or video camera. Lens quality is just as important in digital cameras as it was in the Daguerreotype cameras in the 1800s.
The FitnessGram Pacer Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The 20 meter pacer test will begin in 30 seconds. Line up at the start. The running speed starts slowly, but gets faster each minute after you hear this signal. [beep] A single lap should be completed each time you hear this sound. [ding] Remember to run in a straight line, and run as long as possible.
DEAR READER: Nuclear stress tests are similar to exercise stress tests. During an exercise stress test, a patient gets an electrocardiogram (ECG) and blood pressure readings, and is monitored as he or she walks on a treadmill.An exercise stress test indicates whether the heart gets enough blood and oxygen when itâs working at its hardest.The test is usually done if a patient has symptoms of coronary artery disease (CAD), or if the patientâs doctor wants to assess the effectiveness of the prescribed treatment.EAR READER: Nuclear stress tests are similar to exercise stress tests. During an exercise stress test, a patient gets an electrocardiogram (ECG) and blood pressure readings, and is monitored as he or she walks on a treadmill.