Medivon Horizon Pro Manual Del Usuario página 10

the supervision of a doctor without prior consultation.
· Stop using the massager immediately if you feel uncomfortable or
notice changes in your skin during the massage. Consult a doctor
as soon as possible.
· Do not use or only use the product under medical supervision if
you have vision problems. It is forbidden to use the device by
people after eye surgery and patients suffering from glaucoma,
cataracts, retinal detachment and other eye diseases.
· Contact lens wearers must remove them before wearing the
massager.
· Do not use the Product in places with high temperature,
flammable or humid, as well as in places exposed to electromag-
netic radiation.
· Do not disassemble the device without authorization.
Before use, make sure the product is not damaged or wet to
reduce the risk of failure.
13. Scientific Knowledge: Avoid
"Computer Vision Syndrome"
I. After a long time in front of the computer, we feel discomfort.
Ophthalmologists and optometrists call this "computer vision
syndrome (CVS)". The details of CVS are as follows:
① Eyestrain will increase if the person looking at the screen for a
long time does not blink. When viewing content and images on the
screen, the computer user blinks as little as possible to avoid
missing information.
Blinking is critical to protecting your eyes. It allows you to change
the position of the eyeball, reduce the tension of the lens and the
iris muscle, moisturize the eyes and prevent the feeling of burning,
itching and similar eye ailments.
② The "McCullough Effect" occurs when you see green words on
a black screen, and this is a normal reaction. Although harmless to
the body, this symptom may last for several days. The same effect
will be given by a piece of paper stuck to a white wall, if, when
looking at the paper, we see a pink edge around it.
③ Information for bifocal glasses wearers:
The optimal position for the display should be at or below the chest
height with a distance of 12-18 inches. If the screen height is
inappropriate or the distance is too short, the user will bend his
neck incorrectly or hold his head at a rather unnatural angle, which
may cause dizziness, neck and shoulder pain, or a general feeling
of being unwell. Operating the computer strains the eyes and
reduces the production of lubricant and enzyme in the eyes. By
limiting the number of blinks, it exposes you to dry and tired eyes,
visual disturbances, headaches and other symptoms.
II. After popularizing the computer, operating it is almost an
indispensable part of modern life. Many people have to watch a
computer screen all day as part of their work. Practicing this leads
to eye fatigue and even diseases such as glaucoma. Therefore,
people who spend a lot of time in front of screens should definitely
pay attention to eye care. Main assumptions:
① Avoid using the computer continuously for long periods. Allow
5-10 minutes of rest for each hour of computer work. The
recommended exercise is to focus your eyesight on a distant
object, e.g. a building / tree outside a window.
② Maintain the correct posture while working. The computer
screen should be straight ahead or slightly below the height of your
eyes. The optimal reference point is the center of the screen, which
is 20 ° below the horizontal line of sight.
③ Maintain a sufficient working distance. The eyes should be at
least 60 cm from the computer screen.