Astigmatism - CISMeF

Preferred Label : Astigmatism;

Type : Phenotype or locus, molecular basis unknown;

Description : Astigmatism (from the Greek 'a' meaning absence and 'stigma' meaning point) is a condition in which the parallel rays of light entering the eye through the refractive media are not focused on a single point. Both corneal and noncorneal factors contribute to refractive astigmatism. Corneal astigmatism is mainly the result of an aspheric anterior surface of the cornea, which can be measured readily by means of a keratometer; in a small fraction of cases (approximately 1 in 10) the effect is neutralized by the back surface. The curvature of the back surface of the cornea is not considered in most studies, because it is more difficult to measure; moreover, in the case of severe corneal astigmatism, there is evidence that both surfaces have the same configuration. Noncorneal factors are errors in the curvature of the 2 surfaces of the crystalline lens, irregularity in the refractive index of the lens, and an eccentric lens position. Since the cornea is the dominant component of the eye's refracting system, a highly astigmatic cornea is likely to result in a similarly astigmatic ocular refraction (summary by Clementi et al., 1998).;

Prefixed ID : %603047;

Details

Origin ID

603047;

UMLS CUI

C0004106;

Automatic exact mappings (from CISMeF team)
- refractive error [ICPC-2 Rubric]
- refractive errors [MedlinePlus Topic]
Currated CISMeF NLP mapping
- Astigmatism [PASCAL descriptor]
- Astigmatism [ICD-10 Sub-category]
- Astigmatism [ICD-11 Subcategory]
- Astigmatism [ICD-10 Sub-category (who)]
- Astigmatism [HPO term]
- Astigmatism [MedDRA Preferred Term]
- Astigmatism [HRDO Sign]
- Astigmatism [ICD-9 code]
- Astigmatism (disorder) [SNOMED CT concept]
- astigmatism [Disease (Nov.)]
- astigmatism [DO Concept]
- astigmatism [MeSH Descriptor]
- astigmatism [MeSH concept]
- astigmatism, nos [SNOMED Notion]
DO Cross reference
- astigmatism [DO Concept]
Semantic type(s)
- Disease or Syndrome [UMLS semantic type]
UMLS correspondences (same concept)
- Astigmatism [ICD-10 Sub-category (who)]
- Astigmatism [MedDRA Preferred Term]
- Astigmatism [ICD-9 code]
- Astigmatism [ICD-10 Sub-category]
- Astigmatism [HPO term]
- Astigmatism [HRDO Sign]
- Astigmatism [PASCAL descriptor]
- Astigmatism [ICD-11 Subcategory]
- Astigmatism (disorder) [SNOMED CT concept]
- Astigmatism, unspecified [MedDRA LLT]
- Astigmatism, unspecified [ICD-9 code]
- astigmatism [MeSH Descriptor]
- astigmatism [MeSH concept]
- astigmatism [DO Concept]
- astigmatism [Disease (Nov.)]
- astigmatism, nos [SNOMED Notion]

Keyword's position in hierarchy(ies) :

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