Update on Spectacle Lens
نویسنده
چکیده
Majority of the advances in spectacle lens continue to occur in the area of progressive lens design by most of the spectacle lens manufacturers. Since the introduction of progressive addition lenses (PALs) in 1959 by Essilor, it has gained worldwide acceptance for the treatment of presbyopia. While progressive lens design, manufacturing and dispensing techniques have grown at a good pace in the last decade or so, recent progress in “free-form” has made possible to fabricate progressive lenses with much more precision. In this edition, optical designs of progressive lenses with emphasis on “free-form” progressive lenses, occupational progressive lens, effects of harmful blue-violet light will be reviewed.
منابع مشابه
Corrective lens use and refractive error among United States Air Force aircrew.
Corrective lens use by military aviators is an important consideration in the design of head-mounted equipment. The United States Air Force (USAF) has periodically monitored lens use by aviators; however, it has been over a decade since the last study. We provide an update on the prevalence of corrective lenses and refractive error among USAF aircrew based on eyeglass orders processed through t...
متن کاملEmmetropization in accommodative esotropia: an update and review.
Many children with accommodative esotropia are able to successfully discontinue spectacle wear, while others require spectacle correction into adulthood. Parents often ask about the likelihood of glasses being required on a long-term basis and whether use of spectacles will cause dependency. Most infants are hyperopic and gradually become emmetropic. The extent to which accommodation and specta...
متن کاملIn-the-Spectacle-Lens Telescopic Device for Low Vision
Spectacle-mounted telescopic systems are prescribed for individuals with visual impairments. Bioptic telescopes are typically mounted toward the top of the spectacle lens (or above the frame) with the telescope eyepiece positioned above the wearer’s pupil. This allows the wearer to use up and down head tilt movements to quickly alternate between the unmagnified wide view (through the carrier le...
متن کاملDo tinted spectacle lens wearers have a different personality?
The wearing of tinted spectacle lenses is considered by some health care workers to be a marker of psychopathology or a hypochondriacal personality type. The purpose of this study was to determine whether there is a relationship between the wearing of tinted spectacle lenses and personality type in physically healthy subjects. The Sixteen Personality Factor Questionnaire 5th Edition, a multidim...
متن کاملComparison of low-vision reading with spectacle-mounted magnifiers.
Reading is the most common goal among persons with age-related macular degeneration and other retinal diseases that lead to macular loss, as well as the functional task most affected by the resulting central scotomas. This project determined whether reading ability is different when persons with macular loss read with a new hybrid-diffractive spectacle magnifier versus a refractive-aspheric spe...
متن کامل