We were unable to process your request. Please try again later. If you continue to have this issue please contact [email protected]. NEW YORK — The refractive effect of the Hyperion LTK ...

Large field spectrographs are severely influenced by atmospheric refraction. We discuss the effect of differential refraction across the field as well as the chromatic effects for the Norris ...

BOSTON — Since Intacs micro-thin prescription inserts (KeraVision Inc., Fremont, Calif.) came out on the market, there have been claims and counterclaims regarding the accuracy of KeraVision’s ...

Sunlight may be the bright, warming glow that heats and powers the Earth, but it's so much more than that. If you pass sunlight through a prism, you can see how it's actually composed of all the ...

With refractive outcomes for cataract surgery becoming increasingly precise, expectations for astigmatism correction are rising in equal measure. Although toric intraocular lens (IOL) implants have ...