blind spot (redirected from Visual Scotoma)

spot (spot) a circumscribed area; a small blemish; a macula.

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Bitot's spots  foamy gray, triangular spots of keratinized epithelium on the conjunctiva, associated with vitamin A deficiency.

blind spot 

1. optic disk.

2. mental scotoma.

café au lait spots  macules of a distinctive light brown color, such as occur in neurofibromatosis and Albright's syndrome.

cherry-red spot  the choroid appearing as a red circular area surrounded by gray-white retina, as viewed through the fovea centralis in Tay-Sachs disease.

cold spot  see temperature s's.

cotton-wool spots  white or gray soft-edged opacities in the retina, seen in hypertensive retinopathy, lupus erythematosus, and other conditions.

Forschheimer spots  a fleeting exanthem consisting of discrete rose spots on the soft palate sometimes seen in rubella just prior to the onset of the skin rash.

germinal spot  the nucleolus of an oocyte.

hot spot 

1. see temperature s's.

2. the sensitive area of a neuroma.

3. an area of increased density on an x-ray or thermographic film.

Koplik's spots  irregular, bright red spots on the buccal and lingual mucosa, with tiny bluish-white specks in the center of each; seen in the prodromal stage of measles.

liver spot 

1. a lay term for any of the brownish spots on the face, neck, or backs of the hands in many older people.

2. (pl.) tinea versicolor.

Mariotte's spot  optic disk.

milky spots  aggregations of macrophages in the subserous connective tissue of the pleura and peritoneum.

mongolian spot  a smooth, brown to grayish blue nevus, consisting of an excess of melanocytes, typically found at birth in the sacral region in Asians and dark-skinned races; it usually disappears during childhood.

pain spots  spots on the skin where alone the sense of pain can be produced by a stimulus.

rose spots  an eruption of rose-colored spots on the abdomen and thighs during the first seven days of typhoid fever.

Roth's spots  round or oval white spots sometimes seen in the retina early in the course of subacute bacterial endocarditis.

Soemmering's spot  macula lutea.

Tardieu's spots  spots of ecchymosis under the pleura after death by suffocation.

temperature spots  spots on the skin normally anesthetic to pain and pressure but sensitive respectively to heat and cold.

yellow spot  macula retinae.

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blind spot

n.

1. See optic disk.

2. The area of blindness in the visual field corresponding to the optic disk. Also called physiologic scotoma, punctum cecum.

3. An area or facet of one's personality of which one remains ignorant or fails to gain understanding. Also called mental scotoma, scotoma.

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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.

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Blind Spot

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

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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

1. optic disk.

2. mental scotoma.

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.

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blind

not having the sense of sight. See also blindness.

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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

see typhlopid.

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.

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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