You may avoid wearing glasses when watching a 3D movie. Instead, wear contact lenses if you have them. You can wear comfortably 3D glasses with contacts. The 3D glasses do not affect your vision power, but rather aid each eye in seeing brilliant, vivid images.
People with glasses can still watch 3D movies by wearing special 3D glasses that are designed to fit comfortably over their regular glasses. These 3D glasses are made with larger lenses and a curved design that allows them to fit over most prescription glasses without causing discomfort or distortion.
Using this, the film maker layers two polarized versions of the images onto the screen angled from two slightly different perspectives. Without the 3D glasses, the movie appears fuzzy because the the two images are confusing without the polarization effect.
There's no evidence that viewing too much time wearing 3D glasses causes any long-term eye problems, but it may be uncomfortable in the short-term. The solution for most children and adults with vision issues is to view 3D content sparingly, take frequent breaks, and sit farther away from the screen.
Humans can perceive depth when viewing with one eye, and even when viewing a two-dimensional picture of a three-dimensional scene. However, viewing a real scene with both eyes produces a more compelling three-dimensional experience of immersive space and tangible solid objects.
Since watching 3D entertainment requires depth perception and the use of both eyes to differentiate between the two images on the screen, conditions such as amblyopia can cause a person to be unable to view the entertainment in anything more than two dimensions.
The symptoms that are most common while watching 3D movies are the effects of eye strain. Viewing 3D technology forces the muscles that move your eyes to work in a new way. This may cause eye pain and headaches. Quickly changing scenes while getting used to this new movement can cause dizziness and nausea as well.
And unlike the old days of paper glasses, RealD 3D glasses look like sunglasses, are recyclable and designed to comfortably fit on all moviegoers, and easily over prescription glasses. RealD 3D movies are so realistic that you don't just see what's happening on the screen, you can really feel it.
All types of 3D glasses work by making each eye see two different things. Whether it's one eye seeing a red image and the other eye seeing a blue one or lenses that alternate darkening and lightening, your eyes seeing different things trick your brain into interpreting them in spectacular 3D.
Spatial imaging, on the other hand, reconstructs light rays from objects and forms an optical 3D image that you can view without the need for specialized glasses.
Researchers who study this type of nausea call it cybersickness. Dizziness, headaches and nausea happen while watching 3-D or IMAX movies because the brain receives conflicting information from the senses, said professor Andrea Bubka, who researches cybersickness at St. Peter's College in Jersey City, N.J.
The biggest problem with 3D, though, is the "convergence/focus" issue. A couple of the other issues -- darkness and "smallness" -- are at least theoretically solvable. But the deeper problem is that the audience must focus their eyes at the plane of the screen -- say it is 80 feet away. This is constant no matter what.
The eye doctor will ask you to wear what looks like a pair of sunglasses, then show a book with images, often of a butterfly or reindeer, cartoon characters or circles and other shapes. These images are actually in 3D, and as you identify the 3D images 'popping out of the page' your 3D vision (stereopsis) is measured.
3D images are created because two different images are presented on screen, separated by a certain distance to enrich depth perception. 3D glasses filter light and present various images to each eye, making the scene on the screen blurry.
Depth: Some individuals describe 3D as “popping off the screen” or “coming right at them”, while others only see a faintly raised image or a flat image that resembles a traditional screen. This lack or absence of depth is one of the signs that the binocular vision system is not functioning properly.
Stereoblindness (also stereo blindness) is the inability to see in 3D using stereopsis, or stereo vision, resulting in an inability to perceive stereoscopic depth by combining and comparing images from the two eyes.
With the glasses back on, your brain merges those images to create the perception of depth. The lenses control what each eye sees by filtering the light going to each eye, only letting certain wavelengths pass. This is how a scene might look if you took off your glasses during a 3D movie.
Astigmatism is a common eye problem that can make your vision blurry or distorted. It happens when your cornea (the clear front layer of your eye) or lens (an inner part of your eye that helps the eye focus) has a different shape than normal. The only way to find out if you have astigmatism is to get an eye exam.
Adverse health effects, such as oculomotor symptoms, motor disorientation, and visual fatigue on viewers after three-dimensional exposure, result from the mismatch between the visual, the proprioceptive and the vestibular stimuli.
3D imagery causes these muscles to work separately. Such a change in muscle movement can cause eye strain and fatigue to develop. This can lead to headaches, dizziness and nausea. The symptoms can feel quite similar to motion sickness you might get while riding in a car.
Sit farther back from the screen. Take breaks and get fresh air or a glass of water. Ease yourself into new games, staying active for only 5 minutes at first, then slowly increasing the time you play or watch. Adjust game settings regarding field of view or sensitivity of movement.
Autostereoscopy is any method of displaying stereoscopic images (adding binocular perception of 3D depth) without the use of special headgear, glasses, something that affects vision, or anything for eyes on the part of the viewer.
IMAX 3D movies, come with special IMAX 3D glasses that will be loan to you before you enter the hall and are to be returned after the movie. All other 3D movies, you'll need to bring your own RealD 3D glasses.
The sturdiest option is a pair of cheap glasses or sunglasses from a drugstore or dollar store, with the plastic lenses popped out. At that point, you're not saving much money compared to ready-made 3D glasses, so many people prefer to use poster board, cardstock, or ordinary paper folded in half.