| 영문 | astigmatism | 한글 | 난시 |
|---|---|---|---|
| 설명 | 각막은 눈앞에 있는 맑고 투명한 조직으로 기능은 이것을 통과한 빛을 꺽이게 하는 일종의 볼록렌즈로서 눈앞에 존재하여 눈으로 들어오는 빛을 망막에 맺히게 하는 기능을 한다. 만약 각막이 정상보다 두터워서 들어오는 빛을 많이 꺽이게 하면 빛의 초점이 망막보다 앞에 있게 되고 그렇게 되면 근시가 된다. 만약 각막이 정상보다 얇아지게 되면 들어온 빛이 적게 꺽여서 초점이 망막보다 뒤에 맺여 원시가 된다. 난시란 각막의 표면이 균일한 볼록렌즈와 같지 못하고 일정치 못한 것을 말한다. 이렇게 되면 눈에 들어온 빛이 일정하게 꺽이는 것이 아니고 들어오는 방향에 따라 달리 꺽이게 되어서 촛점이 한 점에 모이지 않고 망막에 맺힌 물체의 상이 찌그러져 보이게 된다. |
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| IDF | inverse document frequency |
|---|---|
| IRV | inferior radicular vein; inspiratory reserve volume; inverse ratio ventilation |
| Astigm. | Astigmatism |
| ah | hyperopic astigmatism |
| AM | Academic Medicine [journal]; actomyosin; acute myelofibrosis; adult male; adult monocyte; aerospace ... |
| SIA | Surgically induced astigmatism |
|---|---|
| IPCR | Inverse PCR |
| IPCR | Inverse polymerase chain reaction |
| IRV | Inverse ratio ventilation |
| PC-IRV | pressure controlled inverse ratio ventilation |
| inverse | 1. Opposite in order, relation, or effect; reversed; inverted; reciprocal; opposed to direct. 2. <botany> Inverted; having a position or mode of attachment the reverse of that which is usual. 3. <mathematics> Opposite in nature and effect; said with reference to any two operations, which, when both are performed in succession upon any quantity, reproduce that quantity; as, multiplication is the inverse operation to division. The symbol of an inverse operation is the symbol of the direct operation with -1 as an index. Thus sin -1 x means the arc whose sine is x. <geometry> Inverse figures, two points lying on a line drawn from the center of a fixed circle or sphere, and so related that the product of their distances from the center of the circle or sphere is equal to the square of the radius. <mathematics> Inverse, or Reciprocal, ratio, the ratio of the reciprocals of two quantities. Inverse, or Reciprocal, proportion, an equality between a direct ratio and a reciprocal ratio; thus, 4: 2:: 1/3: 1/6, or 4: 2:: 3: 6, inversely. Origin: L. Inversus, p. P. Of invertere: cf. F. Inverse. See Invert. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| inverse anaphylaxis | Anaphylactic shock in an animal (e.g., guinea pig) whose tissues contain Forssman antigen, resulting from an intravenous injection of serum that contains Forssman's antibody. (05 Mar 2000) |
| inverse density dependence | <epidemiology> See density dependence. (05 Dec 1998) |
| inverse ocular bobbing | Slow downward eye movement followed by delayed quick upward return. (05 Mar 2000) |
| inverse square law | As applied to point sources, the intensity of radiation diminishes in proportion to the square of the distance from the source. (05 Mar 2000) |
| inverse symmetry | Correspondence of the right or left side of an asymmetrical individual to the left or right side of another. (05 Mar 2000) |
| inverse syntropy | A situation in which the presence of one disease tends to decrease the possibility of another. (05 Mar 2000) |
| astigmatism | <ophthalmology> A visual disturbance caused by an error in the refraction of light within the eye. (27 Sep 1997) |
| astigmatism against the rule | Astigmatism when the greater curvature or refractive power is in the horizontal meridian. (05 Mar 2000) |
| astigmatism of oblique pencils | An aberration occurring when a bundle of light rays strikes a refracting medium in some other direction than parallel to the axis of the lens. (05 Mar 2000) |
| astigmatism with the rule | Astigmatism when the greater curvature or refractive power is in the vertical meridian. (05 Mar 2000) |
| regular astigmatism | Astigmatism in which the curvature in each meridian is equal throughout its course, and the meridians of greatest and least curvature are at right angles to each other. (05 Mar 2000) |
| mixed astigmatism | Astigmatism in which one meridian is hyperopic while the one at right angle to it is myopic. (05 Mar 2000) |
| compound hyperopic astigmatism | Astigmatism in which all meridians are hyperopic but to different degrees. (05 Mar 2000) |
| compound myopic astigmatism | Astigmatism in which all meridians are myopic but to different degrees. (05 Mar 2000) |
제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
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제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
|---|