Computer Vision Syndrome (CVS) – 3rd & Final Part

How should you care for your eyes when using a computer?

To prevent CVS, try to rest your eyes when using the computer. Rest your eyes for 15 minutes after two hours of continuous computer use. Also, for every 20 minutes of computer time, look into the distance for 20 seconds — the “20/20″ rule. Continue reading

Computer Vision Syndrome (CVS) – Part 2

What steps can you take to minimize CVS?

The most important factors in preventing and treating CVS have to do with the ergonomic environment, which is the body’s position relative to the computer and the external environment. This includes lighting conditions, chair comfort, location of reference materials (perhaps using document holders), and the position of the monitor, keyboard, and mouse. Continue reading

Computer Vision Syndrome (CVS) – First in a Series

What is Computer Vision Syndrome?

According to the American Optometric Association (AOA), Computer Vision Syndrome (CVS) is “the complex of eye and vision problems related to near work which are experienced during, or related to, computer use.” For the computer user, this translates to red, itchy, watery, irritated eyes, along with eye fatigue, difficulty focusing, and a variety of other problems. The AOA says surveys of computer workers show that eye and vision problems are the most frequently reported health-related problems, generally occurring in 70 to 75 percent of computer workers. The AOA also says that about 14 percent of patients who schedule eye exams do so because of CVS. Continue reading

How Does GlaucomaCheck™ Work?

We thought that as a change of pace some people might like to hear an explanation of how GlaucomaCheck™ works.  So here it is.

GlaucomaCheck™ is the type of test that is categorized by eye doctors as a visual field analyzer (or perimeter), which tests the functioning of the retina.  It functions by displaying unique patterns of light (stimuli) on the computer monitor and allowing the person taking the test to respond if they see them.  These stimuli are not just simple, solid, white spots.  They are what are known as chromatic sinusoidal gratings.  If the stimulus were slowed down you would see what looks like a bull’s eye, with four concentric areas.  These areas alternate between blue and yellow.  However, instead of being solid bands of color, the color varies in saturation (color intensity) sinusoidally from the center of the bull’s eye to the periphery.  That is, if you make a plot of the color intensity (saturation) relative to the distance from the center you would see a sinusoidal curve varying from blue to yellow. Continue reading


Blepharitis is an inflammation of the eyelids that can affect people of all ages. Excess oil is produced in the glands of the eyelid, which creates a favorable environment for the growth of bacteria. It is an extremely common condition that has multiple causes. The three most prevalent forms of this condition are seborrheic, staphyloccocal, and mixed. Another less common, but severe form of blepharitis, is ulcerative blepharitis. Continue reading

Amblyopia (Lazy Eye)

Amblyopia, or lazy eye, is poor vision in an eye that failed to develop normal sight during early childhood. It is usually caused by a lack of use of that eye because the brain has learned to favor the other eye. To protect a child’s vision, amblyopia should be corrected during infancy or early childhood. Continue reading

8 Leading Risk Factors for Glaucoma

Contrary to popular belief, everyone is at some risk of getting glaucoma, including young adults, children and even newborn babies.  However, certain risk factors substantially increase the chance of getting this potentially blinding disease.  The following are the leading risk factors for glaucoma. Continue reading

About GlaucomaCheck™

In 1999 VisionRx was the first company to make available on the Internet professional-grade eye tests designed for doctors.  Utilizing the most advanced bioengineering and Internet methodologies, GlaucomaCheck™ is a patented technology also originally designed for doctors.  It is the culmination of many years of research and development by leading doctors and engineers.  It is now available for anyone to use on the Internet.  Now you can use this advanced technology in the comfort of your own home to test for glaucoma.  It can even detect other neurological disorders such as stroke and optic neuropathies. Continue reading

About Glaucoma

Glaucoma is one of the two leading causes of preventable blindness in the US and other developed countries.  There are over three million people in the US and over 75 million people worldwide who have this blinding disease, and more than half of them do not know that they have it.  It gradually destroys the retina, the part of the eye which detects light and converts the light into signals which are then sent to the brain.  Generally people do not even realize that their sight is being diminished until 40 to 50% of their retina is permanently destroyed. Continue reading

VisionRx’s Inaugural Post on World Sight Day

VisionRx is pleased to announce the launch of our eyecare blog today – coinciding with World Sight Day!  From this point forward we’ll be posting on a variety of eyecare issues, but we thought we’d start by first telling you a little bit more about VisionRx, about glaucoma and about GlaucomaCheck™, VisionRx’s revolutionary online glaucoma screening test.  We hope that you’re as excited as we are about this new resource! Stay tuned! Continue reading