People are old, their vision may be narrowed
Department of Ophthalmology, Xiangya Hospital, Central South University, deputy director of nurse Dai Minhui □ in charge of nurse Li Chunyan
However, the visual function of the elderly will have a physiological decline. The health condition of the eyes is going downhill, and the narrowing of the field of vision occurs at a rate of 5.3% to 25.4%.
Field of vision refers to the eyes fixed forward when a fixed point of view, you can see the scope of the space, also known as peripheral vision normal range of vision is about the top 56 degrees, 65 degrees nose, 74 degrees below and 90 degrees outside. Narrow simply speaking, you can not see all the objects, the performance of the fixed field of view within the fixed shadow blocking the line of sight, or narrowing the narrow field of view in a direction narrowing the binocular vision about 160 degrees, if not reach this range, it shows Narrow field of vision.
Narrow vision of the elderly can be divided into two types of physiological and pathological. With age, decreased muscle strength around the eyelids, drooping upper eyelid to cover the proportion of the eye is the leading cause of narrowing of the elderly the main physiological reasons Pathological visual field narrowing occurred in people over the age of 60, common causes are cataracts, glaucoma, degenerative myopia, retinal artery or vein obstruction, age-related macular degeneration, retinal detachment, brain tumor or cerebral hemorrhage.
The elderly can be self-examining to determine whether the narrowing of the field of vision to find a normal vision of people standing face to face, looking at each other's eyes, the whole process can not turn around, can not tilt their eyes and then stretched out a finger, starting from the middle Respectively, to move up and down four directions, if the other can see, but can not see, it shows that the direction of vision may be a problem.
Narrowing the field of vision of the elderly can lead to mobility problems and unclear vision. It is recommended not to put too much debris on hand at home, and it is best to go out with your family members to avoid accidents. Elderly friends should be reminded to go regularly to the hospital for vision, Intraocular pressure, fundus and other tests, analysis of the causes and severity of the disease, timely treatment.
