| CBBM | color blindness, blue mono-cone-monochromatic type |
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| CRB | chemical, radiological, and biological; congenital retinal blindness |
| CSNB | congenital stationary night blindness |
| IAPB | International Association for Prevention of Blindness |
| LCB | Laboratory of Cancer Biology; Leber congenital blindness; left costal border; lymphomatosis cutis be... |
| CSNB | Congenital stationary night blindness |
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| RB | Repetition blindness |
| 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) |
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| 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) |
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| 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) |
| 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) |
| 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) |
| 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) |
| blindness | The inability to see or the loss or absence of perception of visual stimuli. This condition may be the result of disorders in the organs of sight or of damage or injury to certain areas of the brain. (12 Dec 1998) |
| blindness, cortical | Total loss of vision in all or part of the visual field due to a lesion in the striate area, characterised by the patient's subjective unawareness of his disability and the absence of cortical functions of vision, with the subcortical functions intact. (12 Dec 1998) |
| canine hereditary blindness | An autosomal dominant condition seen in dogs of the collie and several other breeds. (05 Mar 2000) |
| river blindness | Ocular complications, such as keratitis, iridocyclitis, or retrobulbar neuritis, caused by the microfilariae of Onchocerca volvulus. Synonym: river blindness. (05 Mar 2000) |
| mind blindness | Visual agnosia for objects. The subjet sees the object, but cannot identify it; due to a lesion in area 18 of the occipital cortex. Synonym: object blindness, psychanopsia, psychic blindness. (05 Mar 2000) |
| colour blindness | A sex-linked inherited condition where there is an inability to distinguish colours. Very few women are colour blind, but up to 10% of all men have some degree of colour blindness. The most common for is red-green colour blindness. The second most common is blue-yellow. Inheritance: sex-linked (X chromosome). (27 Sep 1997) |
| moon blindness | An acute iridocyclitis of horses, involving one or both eyes; it subsides only to recur at intervals of varying length and usually ends in blindness; the cause is uncertain but some have associated it with leptospires; does not appear to be contagious. Synonym: moon blindness. (05 Mar 2000) |
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