Star glasses

from Wikipedia, the free encyclopedia
Star glasses

Cataract glasses are glasses which, after the surgical treatment of cataracts , are intended to replace the optical effect of the cloudy eye lens without the subsequent implantation of an artificial lens in order to restore the patient's eyesight.

With glass thicknesses of around +15 diopters , they are first noticeable on the outside due to their extreme thickness. Star glasses are therefore only rarely used today. Above all, the optical side effects, the cosmetically unfavorable effect and the relatively high weight led to the development of implantable intraocular lenses . Weight and cosmetics can be reduced through the use of plastics and high-index materials and an aspherical shape . The severely limited field of vision is also a disadvantage .

One advantage of the star glasses is the magnification, which can be calculated as the product of self-magnification and telescope magnification of the eye-spectacle lens system. This up to 25 percent enlargement causes a corresponding increase in visual acuity when adjusted precisely .

Alternatives to using star goggles are the use of contact lenses (preferably dimensionally stable because of the better long-term tolerance) and the implantation of intraocular lenses.

Web links

Commons : Starglasses  - Collection of images, videos and audio files

literature

  • Karin Brucker, Hans-Peter Wutta: SOS from the eye: macular degeneration, glaucoma, cataracts. Treatment methods and their consequences. The advances in medical research . Verlag Haug, 2003. ISBN 978-3830421276