Übersetzung für "Fovea centralis" in Deutsch

Likewise, the visual axis can be determined as the connecting straight line of the fovea centralis and the pupillary center.

Only those intersection points which are not in the fovea centralis area remain unaffected by the illusion.

But because the most sensitive region of the retina, the Fovea centralis, is somewhat to the side of that axis, the line of sight or line of fixation is angled somewhat with respect to the optical axis.

The density of photoreceptors in the retina (which can be over 200 000 cells per square millimetre in the fovea centralis) plays an important role in visual acuity.

The fovea centralis is the central portion of the human retina that has the most acute vision and the best color perception.

Fixation in ophthalmology refers to the deliberate observation of an object in the area outside the eye, which normally takes place with the retinal point having the highest resolution, this being the fovea centralis.

While the optical axis of the eye is characterized by the straight line between the centers of curvature of refractive surfaces, the axis that extends from the “fovea centralis” through the nodal point of the eye to the fixing object is designated as the visual axis.

In this case, a range of vision of merely less than 5° (typically from 1-2°) is projected onto the fovea centralis (fixation point), the central region on the retina, i.e. the region of the sharpest vision in the human eye.

A camera records an image of a plane of the retina in the region of the fovea centralis (abbreviated as fovea hereinafter).

At its center is located the fovea centralis, a depression having a diameter of approximately 1.5 mm.

For example, such a marker may be present in such a manner that, in the addition to light beams reflected by a significant region of the eye (for example, the fovea centralis or the iris), the detector can also detect light beams which are emitted by the marker, for example, reflected.

The so-called yellow spot (macula) with the fovea centralis 286 —the region with the sharpest vision—with a very high cone density is situated inside the retina.

While, in the normal case, the optical axis 291 and the direction of vision or visual axis 292 hardly deviate from one another, there is definitely the possibility that the fovea centralis is not situated opposite the pupil.

Then, by means of the position of points P 9, P 10 or P 11, P 12, in which a significant jump occurs in the case of the vertical or horizontal scanning in the brightness course SPV or SPH, and/or by means of the distance BV or BH between these points analogous to the above-described methods for determining the pupillary center, the center of the fovea centralis 686 or of the macula center 686 A are determined.

In contrast, the straight line through the pupillary center and the fovea centralis 286 is defined as the direction of vision 292 because, as a rule, a human being will focus his eye on a point to be viewed such that this point is imaged in the region of the sharpest vision.

In the following, preferably the straight line through the pupillary center and the fovea centralis is defined as the direction of vision of an eye because, as a rule, a human being will direct his eye to a point to be viewed in such a manner that this point is imaged in the region of the sharpest vision.

For example, the light perceived by the eye is detected from the reflected ambient light and additionally a light beam is actively beamed in order to detect certain structures, marks or characteristics of the eye (fovea centralis, blind spot, etc.).