The application of pressure to detect tenderness.
A hand-held reflecting stereoscope that can measure convergence and divergence, measure or train binocular vision, or stimulate vision in an amblyopic eye (dimness of vision) or "lazy eye".
, more amicroscopic, most amicroscopic
A reference to something that is too small to be seen through a microscope: The biologist was unable to see the amicroscopic bacteria even with a normal microscope; however, he could see them with a much more powerful microscope later.
An endoscope that, by introduction into the cervical canal, permits direct visualization of the fetus and amniotic fluid which is the fluid that surrounds the developing fetus within the amniotic sac.
This environment cushions the baby from injury and plays an important role in fetal development.
1. A direct visual examination of the contents of the amniotic cavity of the womb during pregnancy by using an endoscope.
2. The direct observation of the fetus, the color, and the amount of amniotic fluid with the use of a specially designed endoscope that is inserted through the uterine cervix or by using an incision in the abdominal wall.
A pair of lenses of different colors used in spectacles for viewing a specially processed two-dimensional picture, creating a three-dimensional effect.
An optical instrument, usually consisting of a cylindrical lens or mirror, that restores an image distorted by anamorphosis (abnormal size or shape) to its normal proportions.
An instrument used to detect and to measure the direction of slow-moving air currents or wind directions.
An instrument that magnifies the capillary circulation for observing blood circulation of the lips, permitting direct observation.
Direct visual inspection of blood vessels of the extremities, a light being held behind the part.
1. A fiberoptic catheter for viewing the inside of a blood vessel.
2. A long fine surgical viewing instrument threaded into a patient's blood vessels to allow surgeons to observe and perform operations without large incisions.
The visualization of small vessels by an angioscope.
1. An instrument used to diagnose abnormalities of color perception in which one-half of a field of color is matched by mixing two other colors.
2. The instrument used in testing for anomalies of color vision by having the subject match mixed spectral lines.
1. An optical toy for producing amusing figures or pictures by means of two revolving disks, on one of which distorted figures are painted.
2. An apparatus for producing and studying anorthoscopic perception which is the real perception of an image viewed under very uncommon conditions.
It consists of a pair of circular discs mounted one behind the other and a figure is drawn on the rear disc and viewed through a slit in the front disc rotating at a different speed while the shape of the image is clearly seen.
1. An instrument for visual examination of the anal canal.
2. A speculum (an instrument that exposes the interior passage or cavity of the body) for examining the anus and lover rectum.
Cross references of word families that are related directly, or indirectly, to: "appear, visible, visual, manifest, show, see, reveal, look":