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 light continues through the vitreous humor, the clear gel that makes up about 80% of the eye s volume, and then, ideally, back to a clear focus on the retina, behind the vitreous. The small central area of the retina is the macula, which provides the best vision of any location in the retina.natomy, Physiology & Pathology of the Human Eye. Included are descriptions, functions, and problems of the major structures of the human eye: conjunctiva, cornea, iris, lens, macula, retina, optic nerve, vitreous, and extraocular muscles.