we can sit at a computer should not exceed 2 hours because if you sit more than 2 hours can be harmful to the eyes. For example:
EYE SYNDROME BY USE OF COMPUTER MyY (COMPUTER VISION syndrome, or CVS)
The common symptoms of CVS are: eye strain or visual fatigue, dry eyes, burning sensation eyes, bright light, blurred vision, headaches and fatigue the shoulders, neck and back strain.
CAUSES AND TREATMENT METHOD
There are many causes of CVS such as reducing the amount of tears to the cornea, excessive glare or reflected light from the screen, the screen placement not properly or refractive eye you need glasses or replace new glass. Here we will review and provide specific solutions for each problem.
STIMULUS TO REDUCE THE EYE:
Irritated eyes often have the following expression: eyestrain, dry eyes, burning and shining eyes.
* Blink YOU DO NOT HAVE ENOUGH?
When we use computers too intently because we blink less often than usual (only bamg 2 / 3 times the normal number), more often due to a computer screen placed above eye level to make us to open his eyes and open eyes that this makes the eyes dry.
User handling
1 - Stay focused more attention to the blink of an eye.
2-eyes 15-minute break after each hour worked on the computer.
3 - If the eyes are too dry you can use to add artificial tears (especially if you use a computer that can wear contact lenses, the eyes will dry out more easily).
Additional artificial tears as needed
* The radiance of light reflected FROM AND MONITORS
Sun and light in the office can be reflected onto the screen and make eye discomfort. You should note:
1 - Set the position so that the window screen at a party.
2 - Adjust curtains so the sun is not shining directly on the screen and your eyes.
Open in new window
3 - Turn off lights on the ceiling if the light was in the opposite case you can use a desk lamp is taken.
Open in new window
(Bright light in the room can reduce the contrast of the screen)
4 - If you use the light table lamp should be placed in position so light is not reflected on the screen.
5 - You can add filters to the filter screen to reduce glare from the screen
Open in new window
(Filter is also helpful)
* Consider MONITORS
People often worry about the harmful radiation from computer monitors but actually, the amount of radiation is usually lower than the maximum allowed.
The screen should be placed 50 to 60 cm eyes and mind of the screen should be placed lower than eye level from 10 to 20 cm because our eyes work just as comfortable when we glanced down slightly as well as when reading the close. If the display lower or higher than this position will make one or neck strain, neck and shoulders.
You should also regularly clean the dust to the dust screen reduces contrast (contrast) of the screen.
* illumination and contrast of the screen [/ b]
Before adjusting the brightness and contrast of the screen we need to pay attention to the intensity of lighting in the room as if the room is too bright it must also adjust the screen brightness to be able to read text on it. So we need to pay attention to adjust the amount of light in the room not too bright or too dark, then we will adjust the brightness and contrast of the screen until our eyes are comfortable.
* TEXT SIZE AND COLOR
Adjusting the font size of text pages also help reduce attempts to cause visual fatigue. Font size font size ideal is 3 times the smallest font sizes, which can be read. Want to adjust the font size of this, we must stand a distance away from the computer about 3 times the normal use and adjust the font size so small that most can still be read.
The best that we should choose a white background or black letters on a light background and dark text is acceptable. Should not adjust for the contrast between text and background reading too poor or too confusing on a platform will easily cause visual fatigue.
* QUALITY MONITORS
Quality of the screen also affects visual comfort while using.
Three factors affect the quality of the screen are: scan speed, resolution and pixels. I was advised to use the screen on the scanning speed is 80 Hz, 800x600 pixels and less than 0.28mm.
Spectacles FOR COMPUTER USE
If you have the first refractive error that you should wear glasses when using a computer because of refractive error as farsightedness, astigmatism or myopia, if not adjusted or adjusted incorrectly will lead to eye strain, headaches if they work longer on the screen.
Signs of refractive error is your blurred vision or eyestrain and working with computers. Then you should go optometrist, ophthalmologist and the technician will measure the refractive eye and give you advice on the appropriate glasses.
If you're at the age of presbyopia (over 40), the more you need to use glasses when working with computers. But the choice of lens for presbyopia using the computer a bit complicated for a computer screen located in the intermediate zone of vision in sight and not nearly far hoacthi sense. In this case, two glass lenses are not suitable because in less than just for near vision, the wearer must raise its head high and look at the new screen that word so easily cause neck strain.
Open in new window
(Two glass lenses may not be appropriate when working with computers is required for visual visual medium)
Solution is that we can use the 3 whites, but the glass is slightly rare on the Vietnam market combined with the visual medium of glass is not very big, so we read is not duocthoai roof. If increased capacity glasses (progressive lenses), then we should choose to use special computer because this type to wear a relatively large middle market, this glass has the advantage that helps us see clearly in any distance (but the disadvantage is the slightly higher price). Otherwise you can use reading glasses (1 glass lenses) for exclusive use when working on the computer.
Glasses for computer users are advised to use the type of lenses have anti-reflected rays (in the anti-splash) because it will reduce the amount of light reflected from the surface 2 glasses of visual fatigue.
You should not wear glasses because aging has made available the type of glass is inserted in the measurement series should definitely not always suitable to each person.
Spectacles match will help us a lot when using computers. It helps us avoid smoky eye aches, headaches, neck aches, fatigue and neck ...
But we also need to pay attention to another factor equally important that the seating arrangements so that reasonable work.
SEATS OF THE UPCOMING WORK
The seating arrangements do not lead to reasonable headaches, neck aches, shoulder aches and neck aches.
You go straight to the screen in front of a difference but do not let the
Should screen the eyes from 50 to 60 cm, not too high and too low, lower center screen view from 10 to 20 cm.
When sitting you should adjust so that the second seat of your forearm parallel to the floor, 2 thighs perpendicular to the second leg and your feet placed flat on the floor.
You should also remember always keep your back straight and shoulders holding two equal
If you use the clips to use when typing documents, the clamp should be as close to the screen as possible.
EYE SYNDROME BY USE OF COMPUTER MyY (COMPUTER VISION syndrome, or CVS)
The common symptoms of CVS are: eye strain or visual fatigue, dry eyes, burning sensation eyes, bright light, blurred vision, headaches and fatigue the shoulders, neck and back strain.
CAUSES AND TREATMENT METHOD
There are many causes of CVS such as reducing the amount of tears to the cornea, excessive glare or reflected light from the screen, the screen placement not properly or refractive eye you need glasses or replace new glass. Here we will review and provide specific solutions for each problem.
STIMULUS TO REDUCE THE EYE:
Irritated eyes often have the following expression: eyestrain, dry eyes, burning and shining eyes.
* Blink YOU DO NOT HAVE ENOUGH?
When we use computers too intently because we blink less often than usual (only bamg 2 / 3 times the normal number), more often due to a computer screen placed above eye level to make us to open his eyes and open eyes that this makes the eyes dry.
User handling
1 - Stay focused more attention to the blink of an eye.
2-eyes 15-minute break after each hour worked on the computer.
3 - If the eyes are too dry you can use to add artificial tears (especially if you use a computer that can wear contact lenses, the eyes will dry out more easily).
Additional artificial tears as needed
* The radiance of light reflected FROM AND MONITORS
Sun and light in the office can be reflected onto the screen and make eye discomfort. You should note:
1 - Set the position so that the window screen at a party.
2 - Adjust curtains so the sun is not shining directly on the screen and your eyes.
Open in new window
3 - Turn off lights on the ceiling if the light was in the opposite case you can use a desk lamp is taken.
Open in new window
(Bright light in the room can reduce the contrast of the screen)
4 - If you use the light table lamp should be placed in position so light is not reflected on the screen.
5 - You can add filters to the filter screen to reduce glare from the screen
Open in new window
(Filter is also helpful)
* Consider MONITORS
People often worry about the harmful radiation from computer monitors but actually, the amount of radiation is usually lower than the maximum allowed.
The screen should be placed 50 to 60 cm eyes and mind of the screen should be placed lower than eye level from 10 to 20 cm because our eyes work just as comfortable when we glanced down slightly as well as when reading the close. If the display lower or higher than this position will make one or neck strain, neck and shoulders.
You should also regularly clean the dust to the dust screen reduces contrast (contrast) of the screen.
* illumination and contrast of the screen [/ b]
Before adjusting the brightness and contrast of the screen we need to pay attention to the intensity of lighting in the room as if the room is too bright it must also adjust the screen brightness to be able to read text on it. So we need to pay attention to adjust the amount of light in the room not too bright or too dark, then we will adjust the brightness and contrast of the screen until our eyes are comfortable.
* TEXT SIZE AND COLOR
Adjusting the font size of text pages also help reduce attempts to cause visual fatigue. Font size font size ideal is 3 times the smallest font sizes, which can be read. Want to adjust the font size of this, we must stand a distance away from the computer about 3 times the normal use and adjust the font size so small that most can still be read.
The best that we should choose a white background or black letters on a light background and dark text is acceptable. Should not adjust for the contrast between text and background reading too poor or too confusing on a platform will easily cause visual fatigue.
* QUALITY MONITORS
Quality of the screen also affects visual comfort while using.
Three factors affect the quality of the screen are: scan speed, resolution and pixels. I was advised to use the screen on the scanning speed is 80 Hz, 800x600 pixels and less than 0.28mm.
Spectacles FOR COMPUTER USE
If you have the first refractive error that you should wear glasses when using a computer because of refractive error as farsightedness, astigmatism or myopia, if not adjusted or adjusted incorrectly will lead to eye strain, headaches if they work longer on the screen.
Signs of refractive error is your blurred vision or eyestrain and working with computers. Then you should go optometrist, ophthalmologist and the technician will measure the refractive eye and give you advice on the appropriate glasses.
If you're at the age of presbyopia (over 40), the more you need to use glasses when working with computers. But the choice of lens for presbyopia using the computer a bit complicated for a computer screen located in the intermediate zone of vision in sight and not nearly far hoacthi sense. In this case, two glass lenses are not suitable because in less than just for near vision, the wearer must raise its head high and look at the new screen that word so easily cause neck strain.
Open in new window
(Two glass lenses may not be appropriate when working with computers is required for visual visual medium)
Solution is that we can use the 3 whites, but the glass is slightly rare on the Vietnam market combined with the visual medium of glass is not very big, so we read is not duocthoai roof. If increased capacity glasses (progressive lenses), then we should choose to use special computer because this type to wear a relatively large middle market, this glass has the advantage that helps us see clearly in any distance (but the disadvantage is the slightly higher price). Otherwise you can use reading glasses (1 glass lenses) for exclusive use when working on the computer.
Glasses for computer users are advised to use the type of lenses have anti-reflected rays (in the anti-splash) because it will reduce the amount of light reflected from the surface 2 glasses of visual fatigue.
You should not wear glasses because aging has made available the type of glass is inserted in the measurement series should definitely not always suitable to each person.
Spectacles match will help us a lot when using computers. It helps us avoid smoky eye aches, headaches, neck aches, fatigue and neck ...
But we also need to pay attention to another factor equally important that the seating arrangements so that reasonable work.
SEATS OF THE UPCOMING WORK
The seating arrangements do not lead to reasonable headaches, neck aches, shoulder aches and neck aches.
You go straight to the screen in front of a difference but do not let the
Should screen the eyes from 50 to 60 cm, not too high and too low, lower center screen view from 10 to 20 cm.
When sitting you should adjust so that the second seat of your forearm parallel to the floor, 2 thighs perpendicular to the second leg and your feet placed flat on the floor.
You should also remember always keep your back straight and shoulders holding two equal
If you use the clips to use when typing documents, the clamp should be as close to the screen as possible.