In addition to these areas, students with low vision and visual limitations may need instruction in the efficient use of vision and in the use of optical aids and alternative learning materials. (hoagiesgifted.org)
Early next year, a company called Ucansi will launch GlassesOff, an iPhone app that could help older people shed their reading glasses for at least part of the time — and may allow others to carry on reading without optical aids for years longer than would otherwise be possible. (newscientist.com)
Under considerably dark skies, M24 is easily located with the unaided eye as a Milky Way star cloud in Northern Sagittarius, i.e. well «above» the teapot asterism and just north of Mu Sagittarii; under less favorable conditions the slightest optical aid will confirm it. (maa.clell.de)