punctum

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punctum

 [pungk´tum] (L.)
a point or small spot.
punctum cae´cum blind spot.
punctum lacrima´le (pl. punc´ta lacrima´lia), an opening of a lacrimal duct on the edge of the eyelid.
punctum prox´imum near point.
punctum remo´tum far point.
punc´ta vasculo´sa minute red spots that mark the cut surface of white matter of the brain.

punc·tum

, gen.

punc·ti

, pl.

punc·ta

(pŭngk'tŭm, -tī, -tă), [TA]
1. The tip or end of a sharp process.
2. A minute round spot differing in color or otherwise in appearance from the surrounding tissues.
3. A point on the optic axis of an optic system.
Synonym(s): point (1)

See also: point, tip, end, center.
[L. a prick, point, pp. ntr. of pungo, to prick, used as noun]

punctum

/punc·tum/ (pungk´tum) pl. punc´ta   [L.] a point or small spot.
punctum cae´cum  blind spot.
punctum lacrima´le  lacrimal point.
punctum prox´imum  near point.
punctum remo´tum  far point.

punctum

[pungk′təm]
a physiological area or point.

punc·tum

, pl. puncta (pŭngk'tŭm, -tă) [TA]
1. The tip of a sharp process.
2. A minute round spot differing in color or otherwise in appearance from the surrounding tissues.
3. The opening into the lacrimal drainage system in the upper and lower eyelids.
Synonym(s): point (1) .
[L. a prick, point, pp. ntr. of pungo, to prick, used as noun]

Punctum

Tiny opening at the inner corners of the upper and lower lids. The area for the beginning of tear drainage.
Mentioned in: Dacryocystitis

punc·tum

, pl. puncta (pŭngk'tŭm, -tă) [TA]
1. Tip or end of a sharp process.
2. Minute round spot differing in color or otherwise in appearance from the surrounding tissues.
Synonym(s): point (1) .
[L. a prick, point, pp. ntr. of pungo, to prick, used as noun]

punctum

pl. puncta [L.] a point or small spot.

imperforate punctum
congenital absence of an opening in the lacrimal punctum, usually the lower, occurs most often in toy and miniature poodles. Commonly absent also in pigs.
misplaced punctum
variations in the position of the lacrimal puncta, seen most commonly in brachycephalic dogs, may interfere with tear drainage.
punctum nasolacrimal
see lacrimal punctum.
obstructed punctum
may result from foreign bodies, inflammation, or swelling of the lower eyelid.