How to Make Frenzel Goggles
Frenzel goggles are used to diagnose vestibular disorders. A vestibular disorder occurs when a patient experiences severe dizziness, vertigo or other balance issues. When the magnified lenses on the goggles are combined with a special lighting system, the disorder is easily diagnosed because the patient's eyes are magnified and cannot fixate. A German physician named Frenzel designed the goggles, and you can make your own pair for fun or for a school/work project. It won't cost you a bundle, but you will need a little technological knowledge and be good with your hands to get the goggles to work properly.Things You'll Need
- One pair of welding goggles
- One pair of 5 cm focal length lenses (or +20 lenses)
- 6 small white LED lights
- Video microscope
- Strong glue
Instructions
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How to Make Frenzel Goggles
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1
Remove the lenses from a pair of welding goggles. Replace these with your 5 cm focal length/+20 lenses. Use strong super glue along the rim of the frames to secure them in place.
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2
Mount 3 LED lights inside each lens to serve as proper illumination. The eyes must be exposed to illuminating light and darkness simultaneously for the goggles to work properly. Plug your LED lights into a power source to ensure they shine inside the goggles, but not to a bright, dangerous level.
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3
Create your video arrangement by using a video microscope. Mount it to the goggles so it is recording only one eye. Use a removable mount (such as a strong rubber clamp) so you will have the freedom to move it easily to the other eye.
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4
Use webcams with IR LEDs as the light source if you are unable to locate a reasonably priced video microscope. Put on the goggles and test them on both yourself and other volunteers. Adjust the lenses and light source to get the proper image size you need for testing.
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5
Store your goggles somewhere safe, as the lenses are breakable and the video equipment is valuable. Bring the goggles out for demonstration purposes or for your project presentation.
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