‘Aspheric’ refers to a type of lens design. It is recommended for those high-powered reading and magnifying eyeglasses. There is also an aspheric design for those who are very near-sighted and wear ‘coke-bottle’ lenses in their eyeglasses. You may also see hand-held and stand magnifying lens that are aspheric in design.
You think that it should be simple: aren’t all eyeglass lenses clear plastic: Most are, but there are several types of plastic, each with features that differentiate them by how they function. There are also glass lenses, which are only occasionally a first choice. Once the eye doctor has written up a prescription for eyeglasses…
Low vision devices come in many forms. They can be optical, such as lenses, eyeglasses, and telescopes, electronic devices, such as video magnifiers, CCTVs, and digital assistants, or objects adapted for use by those who are unable to see details, such as those things that give audible cues or are labeled in large print.
Near vision can be improved by strengthening the eyeglass prescription to magnify. The advantages of high powered reading glasses are that they can have a larger field of view and are hands-free. Adapting to low vision should start with a comprehensive eye examination to optimize your vision with the best eyeglass prescription. This prescription is for…
Hand-held optical magnifiers come in many styles, sizes, and magnification powers. Commonly, they are sold as either round or rectangular clear lenses, with a handle. Other types include small pocket magnifiers and a plastic ‘card’ style. The actual amount of magnification that you get form a hand-held magnifier is variable and dependent on how you…
Optical Character Recognition (OCR), Text-to-Speech (TTS), and Speech Recognition Software (Speech-to-Text, STT) These are three technologies that can be used to manipulate the printed word to make it more accessible for the visually impaired, the blind, and the print disabled. Optical Character Recognition (OCR) This technology is the combination of a software program with either…
Video Magnifiers and CCTVs Video magnifiers and CCTvs vary in size, but are basically a camera, a screen to view what the camera ‘sees’, and a light source. The size will determine its usefulness for various reading tasks. While most video magnifiers are hand-held and portable, most CCTV units requires its own space on a…
The low vision aids can be divided into 3 basic categories: Browse any of the internet sites, like Amazon or Independent Living, Aids and you will see a vast array of devices called ‘low vision aids.’ Low vision aids can be anything from bold lined paper to the desktop CCTV (closed circuit television).
Low vision aides are associated with high powered eyeglasses and magnifiers. Assistive technology refers to low vision aids, both high tech and low tech. They are devices and products designed to level the playing field for those with visual impairments remain active, engaged, and independent. With assistive technology, students can keep up with their classmates and…
