enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Prism correction - Wikipedia

   en.wikipedia.org/wiki/Prism_correction

   Prentice's rule is a formula to calculate the amount of prism correction in a lens based on decentration and lens power. It can be used for prescribing, tolerance control, or determining unprescribed prism in eyeglasses.

3. Prism (optics) - Wikipedia

   en.wikipedia.org/wiki/Prism_(optics)

   Learn about the different types of optical prisms, such as dispersive, reflective, beam-splitting and polarizing prisms, and how they refract, reflect or split light. Find out how prisms are made of transparent materials like glass, acrylic or fluorite, and how they can create spectra, images or polarizations.

4. Eyeglass prescription - Wikipedia

   en.wikipedia.org/wiki/Eyeglass_prescription

   Learn how to interpret and write an eyeglass prescription that includes sphere, cylinder and axis components. Sphere and cylinder specify the power of the lenses, and axis defines the orientation of the cylinder relative to horizontal and vertical.

5. Zenni Optical - Wikipedia

   en.wikipedia.org/wiki/Zenni_Optical

   Zenni Optical is an American company that sells prescription glasses, sunglasses, and contact lenses online. Founded in 2003, it has over 1,000 employees in China and the US, and offers low prices, diverse options, and themed glasses.

6. Optical glass - Wikipedia

   en.wikipedia.org/wiki/Optical_glass

   Optical glass is a type of glass suitable for optical systems such as lenses, prisms or mirrors. It contains additives to modify its optical or mechanical properties, such as refractive index, dispersion, transmittance and thermal expansion.

7. Prism cover test - Wikipedia

   en.wikipedia.org/wiki/Prism_Cover_Test

   A prism cover test is a method to measure strabismus, or eye misalignment, by using prism bars and an occluder. It involves performing an alternate cover test with different prism strengths until the deviation is neutralised.