blind spot


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spot

 [spot]
a circumscribed area or place, usually distinguished by its color; see also macula and tache.
actual focal spot the section of a focal spot on which there is intersection of an electron beam with an anode of an x-ray tube.
Bitot's s's foamy gray triangular spots of keratinized epithelium on the conjunctivae, a sign of vitamin A deficiency.
blind spot
café au lait spot a light brown pigmented macule seen in neurofibromatosis and albright's syndrome.
cherry-red spot the choroid appearing as a red circular area surrounded by gray-white retina, as viewed throught the fovea centralis in tay-sachs disease. Called also Tay's spot.
cotton-wool spot white or gray soft-edged opacities in the retina composed of cytoid bodies; seen in hypertensive retinopathy, lupus erythematosus, and numerous other conditions.
effective focal spot the size of a projected focal spot in a specified direction measured with a quality assurance test tool such as the slit camera.
focal spot
1. the object of a patient's gaze during distraction techniques.
2. a small area of an x-ray target that receives the main electron stream.
Forschheimer s's a fleeting skin eruption consisting of discrete rose spots on the soft palate sometimes seen in rubella just prior to the onset of the skin rash.
Koplik's s's small, irregular, bright red spots on the buccal and lingual mucosa, with a minute bluish white speck in the center of each; they are pathognomonic of beginning measles.
liver spot
1. a lay term for senile lentigo.
2. (in pl.) tinea versicolor.
mental blind spot mental scotoma.
mongolian spot a type of congenital brown to gray-blue nevus; see also mongolian spot.
Roth's s's round or oval white spots consisting of coagulated fibrin seen in the retina in a number of diseases in which a vascular insult resulting in hemorrhage is followed by healing.
Tay's spot cherry-red spot.

phys·i·o·log·ic sco·to·ma

the negative scotoma in the visual field, corresponding to the optic disc.
Synonym(s): blind spot (1)

blind spot

n.
Anatomy The small, circular, optically insensitive region in the retina where fibers of the optic nerve emerge from the eyeball. It has no rods or cones. Also called optic disk.

blind spot

1 a normal gap in the visual field occurring when an image is focused on the space in the retina occupied by the optic disc.
2 an abnormal gap in the visual field caused by a lesion on the retina or in the optic pathways or resulting from hemorrhage or choroiditis, often perceived as light spots or flashes.
Ophthalmology
(1) A small circumscribed area of the retina where the optic nerve enters the eye; occurs normally in all eyes
(2) Any gap in the visual field corresponding to an area of the retina where no visual cells are present; associated with eye disease; optic disk
Psychiatry An area of a person’s personality of which he is totally unaware, since recognition would cause painful emotions
Public health A physical space behind a driver’s outer shoulder between that seen by the rear-view mirrors mounted on the inside and outside of a car

blind spot

Ophthalmology
1. A small area of the retina where the optic nerve enters the eye; occurs normally in all eyes.
2. Any gap in the visual field corresponding to an area of the retina where no visual cells are present; associated with eye disease; optic disk, see there Psychiatry An area of a person's personality of which he is totally unaware, since recognition would cause painful emotions Public health A physical space behind a driver's outer shoulder between that seen by the rear-view mirrors mounted on the inside and outside of a car.

men·tal sco·to·ma

(men'tăl skŏ-tō'mă)
Absence of insight into, or inability to comprehend, items relative to a subject with content that is highly emotional to the person.
Synonym(s): blind spot (2) .

op·tic disc

(op'tik disk) [TA]
An oval area of the ocular fundus devoid of light receptors where the axons of the retinal ganglion cells converge to form the optic nerve head.
Synonym(s): discus nervi optici [TA] , blind spot (3) , optic papilla.

phys·i·o·log·ic sco·to·ma

(fiz'ē-ŏ-loj'ik skō-tō'mă)
The negative scotoma in the visual field, corresponding to the optic disc.
Synonym(s): blind spot (1) .

blind spot

The projection into space of the optic nerve head (optic disc) on the RETINA. This consists solely of nerve fibres and has no receptor elements (rods or cones). The blind spot lies about 15 to the outer side of whatever point we are looking at because the optic disc lies about 15 to the inner side of the macula.

blind spot

the point at which the optic nerve leaves the retina of the eye and from which light-sensitive nerve cells (rods and cones) are absent.

blind

not having the sense of sight. See also blindness.

double blind trial
an experiment in which the identity of the animals in the treatment and control groups is unknown to the experimenter and in addition the assessment of the results is done without the animals' identities being known to the experimenter. Called also blind study.
blind experiment
the identities of the animals that are in the treatment and the control groups are unknown to the experimenter until the end of the trial.
blind snakes
blind spot
the area marking the site of entrance of the optic nerve on the retina; it is not sensitive to light.
blind staggers
see dummy.
blind study
see double blind trial (above).
blind teat
see blind teat.
References in periodicals archive ?
What are the various opportunities and threats faced by the vendors in the global automotive blind spot detection market?
My only criticism is not checking the blind spot and dry steering moving the wheel while the car is stationary.
Bottom line: Blind Spot (352 pages), published by Bantam Books and costing $5.
Paper: "Horizontally progressive mirror for blind spot detection in automobiles," H.
PC Simon Watters continued: This is about blind spot areas for HGVs.
Mercedes has not revealed when the first commercially-available truck will feature the Blind Spot Assist system.
MEPS have backed action to eliminate the blind spots that cause thousands of deaths and serious injuries every year.
Jones] didn't see the motorcycle in his blind spot and knocked the rider off.
FORD is making the blind spot visible thanks to advanced radar technology on its newly launched S-Max and Galaxy models.
The new S-MAX and Galaxy are Ford of Europe's first vehicles to feature the new Blind Spot Information System, which uses radar to warn drivers of vehicles in their blind spot area.
THICK structural supports either side of 4x4 windscreens create a blind spot and pose a major road safety hazard, a report revealed yesterday.
In the UK, the mirror will give additional vision to drivers of left-hand drive lorries from the Continent, filling in the blind spot between what the driver can see in mirrors and what he can see out of the window.