I wasn't sure how reliable the reviews on the site were, but the company overall seemed to be ok from the research I did into them. This is the prism I bought:
One thing to note is that if I put my eye close to it and look at certain light sources, I can see a pretty good separation of the spectrum. For some reason though, it just doesn't seem to want to do the same when reflecting it onto a white surface.
I am not sure if there are certain things in particular to look for in a prism, so any feedback on the matter would be appreciated.
I am trying to gain a better understanding of physics outside of my classes. As such, I decided to buy myself an optical prism to learn more about the spectrum of specific light sources, light filtering, etc. I just received my prism in the mail today, but am severely disappointed. When I was a child, I remember my parents having a prism, and that it was relatively easy to get a rainbow from sunlight. However, the prism that I received today doesn't seem to refract the light properly. It is extremely difficult to get even the slightest hint of a spectrum, and even then, it is very faint and at the edge of a large section of pure white light.I wasn't sure how reliable the reviews on the site were, but the company overall seemed to be ok from the research I did into them. This is the prism I bought: http://dx.com/p/optical-triple-triangular-glass-prism-spectrum-white-?Utm_rid=&Utm_source=affiliate . I would appreciate your thoughts.One thing to note is that if I put my eye close to it and look at certain light sources, I can see a pretty good separation of the spectrum. For some reason though, it just doesn't seem to want to do the same when reflecting it onto a white surface.I am not sure if there are certain things in particular to look for in a prism, so any feedback on the matter would be appreciated.
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Author: Dr. Randy Schulman
EyeCare Associates, CT
Has your eye doctor prescribed prism glasses or lenses?
More recently, people are hearing more and more about prism glasses for a variety of vision problems. Prism glasses are typically prescribed for people who are experiencing double vision, as these lenses help to merge the two images into one clear image.
Why do I need prism lenses?
The following list includes the most common symptoms of vision conditions that may be alleviated with prism lenses:
- Double vision
- Headaches
- Eye strain and fatigue
- Neck, shoulder and back pain
- Dizziness, vertigo and lightheadedness
- Unsteady gait
- Postural problems
- Feeling anxious in crowds and big open spaces
- Difficulty reading, fatiguing, losing place, words running together, etc.
- Difficulty focusing and maintaining concentration
- Difficulty driving for long periods
What are the benefits of prism glasses?
Prisms can be used as a therapeutic tool to provide the following benefits:
- Alleviate diplopia (double vision)
- Reduce stress
- Increase comfort
- Increase sustaining ability on near tasks
- Increase efficiency
- Restore postural adaptation
- Provide control and protection against additional adverse adaptation
Prisms for the treatment of double vision
Prisms may also be prescribed for the treatment of vision problems associated with:
Since double vision can be a sign of a serious health condition, it is important to see your doctor as soon as possible to determine the cause.
If you experience eye strain or double vision, contact an eye doctor near you, who can diagnose and treat any underlying visual problem.
SEE RELATED: How Are Prisms Used in Vision Therapy?
Find a Vision Therapy Eye Doctor Near You
How do prism glasses work?
In normal vision, the two eyes work in tandem by pointing at the same image, simultaneously. Each eye collects distinct visual information to be sent to the brain for processing. The brain then combines the visual input from each eye to produce a single image for you to see clearly.
Double vision occurs when the two eyes are not aligned properly and are unable to work together to point in the same direction, at the same time. As a result, the brain is unable to accurately process the distinct visual input from the two eyes to form a clear, single image.
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Prisms work by moving the image to correct alignment for one eye or both eyes.
For example, if one eye is turned outward, a base-in prism may be used to move the image to accommodate for the position of that eye. If one eye is higher or sees an image higher than the other eye, a base-down prism may be used to accommodate for that eye and move the image up.
Very often, eye doctors will prescribe more than one pair of prism glasses if varying prism powers are required for different activities. This is usually necessary if the two eyes are only misaligned intermittently or for certain distances, or when the eye turn occurs as a result of increased visual demand or fatigue.
What else do prism glasses do?
Not only do prisms displace images to improve vision, they also facilitate changes in perception, as the base of the prism slows down the rate at which light enters the eye, causing objects to appear further away.
As a result, prisms can facilitate improved depth perception, posture, gait, and movement patterns.
Moreover, since prisms change the way light enters the eye and brain, they can have far reaching effects on the entire nervous system&#; affecting breathing, heart rate, muscle tonicity, and even attitude.
Do I still need vision therapy?
Vision therapy is an effective treatment for many different vision problems, including double vision.
While prism lenses will help to relieve your visual symptoms while wearing your glasses, vision therapy is a long term solution for your vision problems.
LEARN MORE: Guide to Neuro-Optometry
Schedule an appointment with an eye doctor for a comprehensive eye exam, and to discuss any questions you may have about prism glasses or vision therapy.
Prism lenses might be the best option for eliminating your eye strain or double vision.
Vision therapy retrains your eye-brain connections to improve your visual skills for clearer, single vision, with or without your eyeglasses.
The company is the world’s best Optical Glass Prisms supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.
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