| NPC | nasopharyngeal carcinoma; near point of convergence; nodal premature contractions; nonparenchymal [l... |
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| PBC | peripheral blood cell; point of basal convergence; pre-bed care; primary biliary cirrhosis; progesti... |
| PcB | near point of convergence to the intercentral base line [punctum convergens basalis] |
| STNR | symmetric tonic neck reflex |
| THE | tetrahydrocortisone E; tonic hind limb extension; transhepatic embolization; tropical hypereosinophi... |
| accommodative convergence | The meter angle of convergence expressed in diopters; equal to the product of the meter angles of convergence times the interpupillary distance measured in centimeters. (05 Mar 2000) |
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| accommodative convergence-accommodation ratio | The amount of convergence (measured in prism diopters of convergence) divided by the amount of accommodation (measured in diopters) required to direct both eyes upon an object. (05 Mar 2000) |
| amplitude of convergence | The distance between the near point and far point of convergence. Synonym: range of convergence. (05 Mar 2000) |
| angle of convergence | <optics> The angle that the visual axis makes with the median line when a near object is viewed. (05 Mar 2000) |
| range of convergence | The distance between the near point and far point of convergence. Synonym: range of convergence. (05 Mar 2000) |
| convergence | <microscopy> In colour video cameras and monitors, the precise alignment of the images or pictures in the three primary colours (red, green and blue). A lack of convergence gives rise to asymmetrically coloured fringes. (05 Aug 1998) |
| convergence excess | That condition in which an oesophoria or esotropia is greater for near vision than for far vision. (05 Mar 2000) |
| convergence insufficiency | That condition in which an oesophoria or esotropia is more marked for far vision than for near vision. (05 Mar 2000) |
| convergence nucleus of Perlia | A small cell group located between the somatic cell columns of the oculomotor nuclei. Since it is placed between the groups of motor neurons innervating, respectively, the left and right medial rectus muscles, the nucleus is considered to possibly represent an integrating mechanism for ocular convergence. Synonym: convergence nucleus of Perlia, Spitzka's nucleus. (05 Mar 2000) |
| convergence, ocular | The turning inward of the lines of sight toward each other. (12 Dec 1998) |
| convergence-retraction nystagmus | Irregular, jerky nystagmus combining convergence and retraction of the eye into the orbit, especially on attempting an upward gaze. Synonym: Koerber-Salus-Elschnig syndrome. (05 Mar 2000) |
| points of convergence | <microscopy> In colour video cameras and monitors, the precise alignment of the images or pictures in the three primary colours (red, green and blue). A lack of convergence gives rise to asymmetrically coloured fringes. (05 Aug 1998) |
| positive convergence | Inward deviation of the visual axes even when convergence is at rest, as in cases of convergent squint. (05 Mar 2000) |
| near point of convergence | The point to which the visual lines are directed when convergence is at its maximum. (05 Mar 2000) |
| negative convergence | The slight divergence of the visual axes when convergence is at rest, as when observing the far point or during sleep. (05 Mar 2000) |