: departing slightly from the spherical form especially in order to correct for spherical aberration an aspheric lens Word History First Known Use 1869, in the meaning defined above Time Traveler The first known use of aspheric was in 1869 See more words from the same year ...
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PURPOSE: To determine the impact of spherical and aspheric foldable intraocular lens (IOL) tilt and decentration on optical quality after cataract surgery in an intraindividual comparative study. SETTING: Department of Ophthalmology, Goethe-University, Frankfurt am Main, Germany. METHODS: Randomized ...
Conventional lenses have a front surface that is spherical, meaning it has the same curve across its entire surface, much like a baseball. Aspheric lenses, on the other hand, have a more complex front surface that gradually changes in curvature from the center of the lens out to the edge. ...
Objective and subjective outcomes in comparing three different aspheric intraocular lens implants with their spherical counterparts. Eye (Lond). 2009;23:877-883.Cuthbertson FM,Dhingra S,Benjamin L.Objective and subjective outcomes in comparing three different aspheric intraocular lens implants with their ...
It is then possible to obtain a good imaging quality (with low spherical aberrations) already with a single lens, or with fewer lenses in an objective. However, aspheric lenses are more difficult to fabricate and thus more expensive. Achromatic Lenses The most common approach for obtaining an ...
TypicalTolerances OuterDiameter(OD)±0.015mm ClearAperture(CA)±0.100mm EffectiveFocalLength(EFL)±1% WorkingDistance(WD)±1%ofEFL SphericalvsAsphericalLensSystems AsphericLens SphericalSystem Aspheresprovideelegant single-elementsimplicity Clear Aperture Outer Diameter Edge Thickness Laser Window Working Distance...
been added to a molded aspheric lens. The aspheric lens eliminates all spherical aberration, while the diffractive surface has a net effect of introducing negative dispersion – when properly tuned to the refractive index and wavelength design of the lens, chromatic aberration is eliminated as well....
been added to a molded aspheric lens. The aspheric lens eliminates all spherical aberration, while the diffractive surface has a net effect of introducing negative dispersion – when properly tuned to the refractive index and wavelength design of the lens, chromatic aberration is eliminated as well....
:departing slightly from the spherical form especially in order to correct for spherical aberration anasphericlens Word History First Known Use 1869, in the meaning definedabove Time Traveler The first known use ofasphericwas in 1869 See more words from the same year ...