| depth perception | Perception of three-dimensionality. (12 Dec 1998) |
|---|---|
| vision, monocular | Vision with one eye or the affecting of one eye. (12 Dec 1998) |
| monocular | 1. Having only one eye; with one eye only; as, monocular vision. 2. Adapted to be used with only one eye at a time; as, a monocular microscope. Origin: L. Monoculus; Gr. Single + L. Oculus eye: cf. F. Monoculaire. Source: Websters Dictionary (01 Mar 1998) |
| monocular diplopia | A double image or an extra ghost image produced in one eye, almost always by an aberration of the ocular media; for example, a corneal or lenticular irregularity, an uncorrected astigmatism or an irregularity of the vitreous or the retina. If a similar process occurs in both eyes (bilateral monocular diplopia), that is, the doubling is still present with either eye covered, the patient may still only see two images; seeing multiple images (polyopia) is rare. (05 Mar 2000) |
| monocular heterochromia | A variegated or two-coloured iris. Synonym: monocular heterochromia. (05 Mar 2000) |
| monocular microscope | <instrument, microscopy> A microscope with one objective and one bodytube for monocular vision. (05 Aug 1998) |
| monocular strabismus | An obsolete term for strabismus in which one eye habitually deviates. (05 Mar 2000) |
| anaesthetic depth | The degree of central nervous system depression produced by a general anaesthetic agent; a function of potency of the anaesthetic and the concentration in which it is administered. (05 Mar 2000) |
| depth | Distance from the surface downward. (05 Mar 2000) |
| depth compensation | In ultrasonography, an increase in receiver gain with time to compensate for loss in echo amplitude with depth, usually due to attenuation. Synonym: attenuation compensation, depth compensation, time compensation gain, time-compensated gain, time-varied gain control, time-varied gain. (05 Mar 2000) |
| depth dose | The dose of radiation at a distance beneath the surface, including secondary radiation or scatter, in proportion to the dose at the surface. (05 Mar 2000) |
| depth of field | <microscopy> The depth or thickness of the object space that is simultaneously in acceptable focus. The distance between the closest and farthest objects in focus within a scene as viewed by a lens at a particular focus and with given settings. The depth of field varies with the focal length of the lens and its f-stop setting or numerical aperture, and the wavelength of light. Depth of fields only a small fraction of a micrometre can be achieved at 546 nm with microscope lenses of N.A. Greater than 0.9. (05 Aug 1998) |
| depth of focus | <microscopy> The depth or thickness of the image space that is simultaneously in acceptable focus. The range of distances between a lens and image plane (target in the video pickup device) for which the image formed by the lens at a given setting is clearly focused. With a high-numerical aperture microscope objective, the depth of field is very shallow, but the depth of focus can be quite deep and reach several millimetres. (05 Aug 1998) |
| depth psychology | The psychology of the unconscious, especially in contrast with older (19th century) academic psychology dealing only with conscious mentation; sometimes used synonymously with psychoanalysis. (05 Mar 2000) |
| depth recording | Study of subcortical cerebral electrical activity after placing electrodes in these areas. (05 Mar 2000) |