| HFRS | Hemorrhagic Fever with Renal Syndrome [HP 849-50] = Korean Hemorrhagic Fever &nbs... |
|---|---|
| FA | false aneurysm; Families Anonymous; Fanconi anemia; far advanced; fatty acid; febrile antigen; femor... |
| FAR | Federal acquisitions regulation; fractional albumin rate; fresh bone marrow |
| far | faradic |
| FETE | Far Eastern tick-borne encephalitis |
| FR | Far-red light |
|---|---|
| FR | far-red |
| far sight | Farsightedness or hyperopia occurs when a refractive error in which light rays entering the eye are focused behind the retina. This condition is easily corrected with corrective lenses or contact lenses. (27 Sep 1997) |
|---|
| second sight | 1. <ophthalmology> Improved near vision in the aged as a result of increased refractivity of the nucleus of the lens causing myopia. Synonym: senile lenticular myopia. 2. The power of discerning what is not visible to the physical eye, or of foreseeing future events. Such as are of a disastrous kind, the capacity of a seer or prophetic vision. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| short sight | <ophthalmology> That error of refraction in which rays of light entering the eye parallel to the optic axis are brought to a focus in front of the retina, as a result of the eyeball being too long from front to back (axial myopia) or of an increased strength in refractive power of the media of the eye (index myopia). Also called nearsightedness, because the near point is less distant than it is in emmetropia with an equal amplitude of accommodation. Origin: Gr. Myein = to shut (18 Nov 1997) |
| sight | 1. The act of seeing; perception of objects by the eye; view; as, to gain sight of land. "A cloud received him out of their sight." (Acts. I. 9) 2. The power of seeing; the faculty of vision, or of perceiving objects by the instrumentality of the eyes. "Thy sight is young, And thou shalt read when mine begin to dazzle." (Shak) "O loss of sight, of thee I most complain!" (Milton) 3. The state of admitting unobstructed vision; visibility; open view; region which the eye at one time surveys; space through which the power of vision extends; as, an object within sight. 4. A spectacle; a view; a show; something worth seeing. "Moses said, I will now turn aside and see this great sight, why the bush is not burnt." (Ex. Iii. 3) "They never saw a sight so fair." (Spenser) 5. The instrument of seeing; the eye. "Why cloud they not their sights?" (Shak) 6. Inspection; examination; as, a letter intended for the sight of only one person. 7. Mental view; opinion; judgment; as, in their sight it was harmless. "That which is highly esteemed among men is abomination in the sight of God." (Luke xvi. 15) 8. A small aperture through which objects are to be seen, and by which their direction is settled or ascertained; as, the sight of a quadrant. "Thier eyes of fire sparking through sights of steel." (Shak) 9. A small piece of metal, fixed or movable, on the breech, muzzle, center, or trunnion of a gun, or on the breech and the muzzle of a rifle, pistol, etc, by means of which the eye is guided in aiming. 10. In a drawing, picture, etc, that part of the surface, as of paper or canvas, which is within the frame or the border or margin. In a frame or the like, the open space, the opening. 11. A great number, quantity, or sum; as, a sight of money. Sight in this last sense was formerly employed in the best usage. "A sight of lawyers." "A wonder sight of flowers." (Gower) at sight, as soon as seen, or presented to sight; as, a draft payable at sight: to read Greek at sight; to shoot a person at sight. Front sight A front sight through which the objects aimed at may be seen, in distinction from one that hides the object. A rear sight having an open notch instead of an aperture. Peep sight, Rear sight. See Peep, and Rear. Sight draft, an order, or bill of exchange, directing the payment of money at sight. To take sight, to take aim; to look for the purpose of directing a piece of artillery, or the like. Synonym: Vision, view, show, spectacle, representation, exhibition. Origin: OE. Sight, sit, siht, AS. Siht, gesiht, gesih, gesieh, gesyh; akin to D. Gezicht, G. Sicht, gesicht, Dan. Sigte, Sw. Sigt, from the root of E. See. See See. Source: Websters Dictionary (01 Mar 1998) |
| sight blindness | A form of aphasia in which the significance of signs and symbols is not appreciated. Synonym: sight blindness. Synonym: asemasia, asaemia. Origin: G. A-priv. + symbolon, an outward sign (05 Mar 2000) |
| near sight | <ophthalmology> That error of refraction in which rays of light entering the eye parallel to the optic axis are brought to a focus in front of the retina, as a result of the eyeball being too long from front to back (axial myopia) or of an increased strength in refractive power of the media of the eye (index myopia). Also called nearsightedness, because the near point is less distant than it is in emmetropia with an equal amplitude of accommodation. Origin: Gr. Myein = to shut (18 Nov 1997) |
| night sight | <ophthalmology> Day blindness, defective vision in a bright light. Origin: Gr. Hemera = day, alaos = blind (18 Nov 1997) |
| day sight | Night blindness or difficulty in seeing at night. Symptom of vitamin A deficiency. (27 Sep 1997) |
| long sight | Farsightedness or hyperopia occurs when a refractive error in which light rays entering the eye are focused behind the retina. This condition is easily corrected with corrective lenses or contact lenses. (27 Sep 1997) |
| far | 1. To a great extent or distance of space; widely; as, we are separated far from each other. 2. To a great distance in time from any point; remotely; as, he pushed his researches far into antiquity. 3. In great part; as, the day is far spent. 4. In a great proportion; by many degrees; very much; deeply; greatly. "Who can find a virtuous woman ? for her price is far above rubies." (Prov. Xxxi. 10) As far as, to the extent, or degree, that. See As far as, under As. Far off. at a great distance, absolutely or relatively. Distant in sympathy or affection; alienated. "But now, in Christ Jesus, ye who some time were far off are made nigh by the blood of Christ." Far other, different by a great degree; not the same; quite unlike. Far and near, at a distance and close by; throughout a whole region. Far and wide, distantly and broadly; comprehensively. "Far and wide his eye commands." . From far, from a great distance; from a remote place. Far often occurs in self-explaining compounds, such as far-extended, far-reaching, far-spread. <zoology> A young pig, or a litter of pigs. See: Farrow. Source: Websters Dictionary (01 Mar 1998) |
| far-and-near suture | A suture utilizing alternate near and far stitches, used to approximate fascial edges. (05 Mar 2000) |
| far east | A geographic area of east and southeast asia encompassing china, hong kong, japan, korea, macao, mongolia, and taiwan. (12 Dec 1998) |
| Far East haemorrhagic fever | Tick-borne infection with Rickettsia sibirica, seen primarily in Siberia and Mongolia. (05 Mar 2000) |
| Far East Russian encephalitis | Tick-borne encephalitis (Eastern subtype). (05 Mar 2000) |
| far point | That point in conjugate focus with the retina when the eye is not accommodating. Synonym: punctum remotum. (05 Mar 2000) |
| far point of convergence | The point to which the visual lines are directed when convergence is at rest. (05 Mar 2000) |
| far sight |
Hyperopia (or more rarely, hypermetropia), also known as farsightedness or longsightedness, is a defect of vision caused by an imperfection in the eye (often when the eyeball is too short), causing inability to focus on near objects, and in extreme cases causing a sufferer to be unable to focus on objects at any distance. As an object moves towards the eye, the eye must increase its power to keep the image on the retina. ...
Ãâó: en.wikipedia.org/wiki/Far_sight
|
|---|
Á¦Ç°¸í |
ÆÇ¸Å»ç |
º¸ÇèÄÚµå | ¼ººÐ/ÇÔ·® | ±¸ºÐ/º¸Çè±Þ¿© |
|---|
Á¦Ç°¸í |
ÆÇ¸Å»ç |
º¸ÇèÄÚµå | ¼ººÐ/ÇÔ·® | ±¸ºÐ/º¸Çè±Þ¿© |
|---|