uncorrected lens

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• overcorrect — | ̷ ̷ ̷ ̷ ̷ ̷| ̷ ̷ transitive verb : to apply a correction to in excess of that required (as for satisfactory performance); specifically : to correct (a lens) beyond the point of achromatism or so that there is aberration of a kind opposite to… …   Useful english dictionary

• overcorrect — over·cor·rect kə rekt vt to apply a correction to in excess of that required (as for satisfactory performance) specif to correct (a lens) beyond the point of achromatism or so that there is aberration of a kind opposite to that of the uncorrected …   Medical dictionary

• Optical aberration — v · d · e Optical aberration …   Wikipedia

• Eyeglass prescription — Using a phoropter to determine a prescription for eyeglasses An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist or ophthalmologist, that specifies the value of all parameters the prescriber has deemed… …   Wikipedia

• Keratoconus — Classification and external resources The conical cornea that is characteristic of keratoconus ICD 10 H …   Wikipedia

• Big Eddy Site — The Big Eddy Site (23CE426) is an archaeological site located in the southwestern portion of the U.S. state of Missouri, which was first excavated in 1997 and is now threatened due to erosion from the Sac River. Location and General… …   Wikipedia

• Hemispherical photography — Hemispherical photography, also known as fisheye or canopy photography, is a technique to estimate solar radiation and characterize plant canopy geometry using photographs taken looking upward through an extreme wide angle lens (Rich 1990).… …   Wikipedia

• optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… …   Universalium

• F-number — In optics, the f number (sometimes called focal ratio, f ratio, or relative aperture [Smith, Warren Modern Lens Design 2005 McGraw Hill] ) of an optical system expresses the diameter of the entrance pupil in terms of the focal length of the lens; …   Wikipedia

• Chromatic aberration — On top is corner detail in a photograph taken with a higher quality lens; bottom is a similar photograph taken with a wide angle lens showing severe visible lateral chromatic aberration. The effect is pronounced on the right side of the building… …   Wikipedia

• Presbyopia — is a condition where the eye exhibits a progressively diminished ability to focus on near objects with age. Presbyopia’s exact mechanisms are not known with certainty; the research evidence most strongly supports a loss of elasticity of the… …   Wikipedia