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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.
The standard definition of convergence insufficiency is exophoria greater at near than at distance, a receded near point of convergence, and reduced convergence amplitudes at near. [4] See also [ edit ]
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.
An accretionary wedge or accretionary prism forms from sediments accreted onto the non-subducting tectonic plate at a convergent plate boundary. Most of the material in the accretionary wedge consists of marine sediments scraped off from the downgoing slab of oceanic crust , but in some cases the wedge includes the erosional products of ...
The optical axis of the telescope must also be perpendicular to the horizontal axis; if not, then a collimation error exists. Index error, horizontal-axis error ( trunnion-axis error) and collimation error are regularly determined by calibration and are removed by mechanical adjustment.
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.
In simple terms, geomorphometry aims at extracting (land) surface parameters (morphometric, hydrological, climatic etc.) and objects (watersheds, stream networks, landforms etc.) using input digital land surface model (also known as digital elevation model, DEM) and parameterization software.
Integrated geography helps us to ponder the environment in terms of its relationship to people. With integrated geography we can analyze different social science and humanities perspectives and their use in understanding people environment processes.
Glossary of geography terms (N–Z) lists terms beginning with the letters N through Z. Related terms may be found in Glossary of geology, Glossary of agriculture, Glossary of environmental science, and Glossary of astronomy . Contents: Top.
Philosophy of geography is the subfield of philosophy which deals with epistemological, metaphysical, and axiological issues in geography, with geographic methodology in general, and with more broadly related issues such as the perception and representation of space and place.