The explanation for flickering colors is the tendency of viewing moving objects through a lens. Lens flares happen when the light coming from an object doesn’t only go straight into your eye but also reflects off the surface of that object. This creates a rainbow halo effect at the outside edges of the light.
Flashing remains one of projector and LCD screens‘ biggest flaws. Because of the psychophysiological effect, flashing is considered an annoying distraction. Most people simply try to ignore it or get used to it by ignoring the blinking lines.
Causes for Colored Light Patterns
1. The first reason for this syndrome is the subject’s movement at a rapid pace while looking at the image, which causes an increased blinking speed. According to a study published in Vision Research, the blinking rate increases by as much as 165 percent while viewing moving objects from a distance of 10 meters.
2. Another reason for flashes is because the subjects have their eyes closed for a long time. Light travels through the cornea and the retina when one’s eyes are closed. However, it doesn’t pass through the lens.
3. When using polarized sunglasses, some of the light that passes through is reflected by the lenses and appears as flashes of colored light. This is why polarized sunglasses are better than un-polarized ones since they block more light from reflecting off the lenses.
4. Flashes of green, red and blue might also appear due to the buildup of oil on the eyes’ surface because of prolonged use, according to modern scientists and ophthalmics.
5. The focal point of the cornea is responsible for detecting colored light. However, many people report having flashes with a single image like a computer or projector screen. This is because the focal plane is not properly aligned with the subject’s eyes. An easy way to fix this problem is by rotating your glasses to align the surface with your eyes in a parallel way.
Role of the Projector
The projector’s role in the flashing phenomenon is controversial. Some people believe that the flashing is initially caused by the physical screen and then reflected on others with the help of the projector. However, certain researches prove that this syndrome is actually attributed to the human eye and not due to the interference of other electronic devices.
Treatment for the Flashing Phenomenon
1. Administering Drugs
There are certain drugs that can help to solve this problem. These drugs help to block out the pupils from contracting. As a result, the blinking rate decreases.
2. Watching TV
According to experts, people who suffer from this syndrome can reduce flickering by watching television programs in full-screen mode.
3. Virtual Retinal Display (VRD)
A new technology called Virtual Retinal Display (VRD) which is evolving, is helping to reduce this phenomenon. VRD is made of systems that use a 3-D video image to focus the eye’s image on the retina. The resulting, less distracting image then allows for better readability and sharper pictures.
4. Adjusting Focus
A possible solution for this problem lies in adjusting the focus on one’s eyesight. The lens is responsible for getting the image of a subject to focus. You can maneuver your eyes by adjusting the distance between the projector and the place from where you are viewing.
5. Proper Lighting
Sometimes, switching from one room to another can solve this problem. You may also try replacing your light bulbs with LED lights because these do not support lens flares or colored light patterns.
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Conclusion
Every individual has different reactions when viewing colorful projected images. Some people describe the flashing phenomenon as annoying or distracting, while others find it fascinating. The flashing phenomenon is not well-understood, but we can get better at detecting and ignoring it. There is no real way to solve the flashing phenomenon, but we can certainly keep our eyes focused on a subject while looking at a moving image on a projector screen.