The latest study, released by the plaintiffs in a class-action lawsuit against Fitbit, found that the pulse-monitoring technology used in the company's wrist-bound Surge and Charge devices was highly inaccurate during elevated physical activity..
An eye disease affecting the macula (the center of the light-sensitive retina at the back of the eye), causing loss of central vision. Migraine with Aura: A type of severe headache accompanied by various visual symptoms. Myopia: See nearsightedness: Nearsightedness
(The center of the retina is where the image that you see is focused and is also called the macula.) The tissue grows as a sheet or membrane on the retinal surface and, in some people, contracts and distorts the center of the retina.