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  2. Prism correction - Wikipedia

    en.wikipedia.org/wiki/Prism_correction

    Prism correction is measured in prism dioptres. A prescription that specifies prism correction will also specify the "base". The base is the thickest part of the lens and is opposite from the apex. Light will be bent towards the base and the image will be shifted towards the apex.

  3. Esophoria - Wikipedia

    en.wikipedia.org/wiki/Esophoria

    Esophoria is an eye condition involving inward deviation of the eye, usually due to extra-ocular muscle imbalance. It is a type of heterophoria. Cause. Causes include: Refractive errors; Divergence insufficiency; Convergence excess; this can be due to nerve, muscle, congenital or mechanical anomalies.

  4. Worth 4 dot test - Wikipedia

    en.wikipedia.org/wiki/Worth_4_dot_test

    It can be used to establish whether a patient has the ability for the eyes to fuse the light that is received from each eye into 4 lights. The test is indicated with the use of a presence of a prism in individuals with a strabismus and fusion is considered present if 4 lights are maintained, with or without the use of a prism. The W4LT can also ...

  5. Accretionary wedge - Wikipedia

    en.wikipedia.org/wiki/Accretionary_wedge

    An accretionary wedge or accretionary prism forms from sediments accreted onto the non-subducting tectonic plate at a convergent plate boundary.

  6. Geomorphometry - Wikipedia

    en.wikipedia.org/wiki/Geomorphometry

    Geomorphometrics is the discipline based on the computational measures of the geometry, topography and shape of the Earth's horizons, and their temporal change. [2] This is a major component of geographic information systems (GIS) and other software tools for spatial analysis. In simple terms, geomorphometry aims at extracting (land) surface ...

  7. Five themes of geography - Wikipedia

    en.wikipedia.org/wiki/Five_themes_of_geography

    The five themes of geography are an educational tool for teaching geography. The five themes were published in 1984 and widely adopted by teachers, textbook publishers, and curriculum designers in the United States.

  8. Geodesy - Wikipedia

    en.wikipedia.org/wiki/Geodesy

    Definition. In English, geodesy refers to the science of measuring and representing geospatial information, while geomatics encompasses practical applications of geodesy on local and regional scales, including surveying.

  9. Glossary of geography terms (A–M) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_geography_terms...

    This glossary of geography terms is a list of definitions of terms and concepts used in geography and related fields, including Earth science, oceanography, cartography, and human geography, as well as those describing spatial dimension, topographical features, natural resources, and the collection, analysis, and visualization of geographic ...

  10. Optometer (ophthalmic instrument) - Wikipedia

    en.wikipedia.org/wiki/Optometer_(ophthalmic...

    The optometer was a device used for measuring the necessary spherical and/or cylindrical corrections to be prescribed for eyeglasses, from the middle of the 18th century until around 1922, when modern instruments were developed.

  11. Pentagrammic antiprism - Wikipedia

    en.wikipedia.org/wiki/Pentagrammic_antiprism

    3D model of a (uniform) pentagrammic antiprism. In geometry, the pentagrammic antiprism is one in an infinite set of nonconvex antiprisms formed by triangle sides and two regular star polygon caps, in this case two pentagrams . It has 12 faces, 20 edges and 10 vertices.

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