Types ofprisms

Topics: Grandstream, Peripherals, Trends, Mobility (including remote work), Videoconferencing, Productivity, Product Review, Unified Communications

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The stronger the prism, the thicker and blurrier it will be.  Few patients tolerate Fresnel prisms greater than 15 prism diopters (PD) because of blur.  An optical shop can fit a ground-in prism up to or greater than 8 PD into each lens of the glasses, but with these stronger prisms, thickness, cost and weight of the glasses all increase.

It depends. For smaller deviations in patients who already wear glasses, prisms may be a good long-term option. For larger deviations, or for deviations that change in different gaze directions, prisms may help improve function temporarily until the decision for surgery is finalized. Whether or not prisms are used, strabismus might worsen over time, and surgery may eventually be necessary.

Prisms are sometimes used if a child is seeing double after surgery, or to help control a head tilt when there is vertical misalignment. They may be permanent or temporary. Other less common uses of prism for children include nystagmus, visual field abnormalities, and for irregular head positions.

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Prisms can move an image up or down, and left or right.  Unfortunately, prisms cannot rotate an image.  Prisms may be able to bring the images close enough together to give the brain a chance to adjust to the tilt.

No. Prisms do not strengthen the eye muscles or move the eyes. They are more like a crutch that makes it easier for the misaligned eye to line up with the target.

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There are two main types of prisms: Fresnel (press-on) and ground-in. Fresnel prisms are a thin film that can be stuck onto the inside of the glass’s lens in the office, while ground-in prisms must be made by an optical shop.

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Fresnel prisms are easily changeable, but they have lines that can blur your vision and are likely to be noticed by others. They require frequent cleaning. For this reason, Fresnel prisms are usually used as a temporary measure. Ground-in prisms have a clearer image than Fresnel prisms – the glasses look like normal glasses – but they can be heavy, with one thick edge.  Ground-in lenses tend to be more expensive.

Effective communication requires the ability to see and hear each other clearly. With today’s distributed workforce trends, new technologies and devices are needed to deliver the high-quality audio and video that workers are accustomed to in their in-person meetings. Grandstream has made great strides in rolling out innovative endpoints to make remote communications not only of higher quality, but more comfortable, as well.

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In this article, we review Grandstream’s exciting GUV3100 HD webcam, which is part of the GUV series of personal collaboration endpoints.

You may remember from science class that a prism can separate a beam of white light into a rainbow of colors. For this reason, prism glasses (of any type) may cause colored fringes around objects. The image through prism lenses also tends not to be as clear as with prism-free glasses.

Grandstream CEO David Li has this to say about the webcam: “The GUV3100 exemplifies our continued commitment to offering competitive personal collaboration devices that enhance remote communications. Our GUV series was designed to meet the growing remote collaboration needs of any organization with a portfolio of powerful and easy-to-use USB headsets and a webcam. The newly released GUV3100 adds a 1080p HD webcam and pairs with the GUV3000/3005 HD USB headsets to cover all audio and video collaboration needs while being compatible with all major platforms and apps. We are excited to work with our partners to bring the GUV series to customers around the world.”

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Grandstream’s GUV3100 HD webcam delivers an exceptional video and audio experience to allow collaborators from any industry or sector to communicate effectively, easily and comfortably.

The camera is compatible with all major third-party communication platforms, apps, and softphones, as well as Grandstream’s IPVideoTalk Meetings and Wave app. Ideal for remote workers, the GUV3100 provides an easy-to-setup, easy-to-use USB webcam with Full HD video and audio quality for web meetings, video conferences, and more.

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The GUV3100 camera captures sharp and vibrant video using its 2-megapixel CMOS at 30 frames per second, and delivers clear high-definition audio via its two built in microphones. It has many highly configurable video settings including brightness, resolution, saturation, contrast, gain, and low-light compensation features. For an even higher quality audio experience, use the camera in conjunction with the Grandstream GUV3000 & GUV3005 HD USB headsets or Grandstream’s GUV3050 Bluetooth headset.

You or your child has been prescribed ophthalmic prisms to help manage a misalignment of the two eyes. These prisms were prescribed because the eyes are not looking in the same place at the same time (“strabismus.”) Prisms shift the images to get them to correspond with the misaligned eye position. This helps the eyes work together and can reduce or eliminate double vision (“diplopia.”)

Usually, the least amount of prism necessary to control double vision is prescribed.  This can help the patient work towards better alignment in some cases. If the prisms are too strong, they can be uncomfortable and might even worsen a patient’s strabismus.

Focusing on the senses of sight and sound, the GUV3100 lets those you are communicating with see and hear you clearly. Delivering 1080p HD video and high-quality audio captured by two built-in microphones, this camera is perfect for any remote employee, collaborator, teacher, professor, medical professional, family member, or friend to transmit crystal-clear audio and video.

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