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Right visual hemifield
Right visual hemifield The right half of the visual field, projects on the nasal hemiretina of the right eye and on the temporal hemiretina of the left eye.
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Temporal
Having to do with the side of the head.
Eye
The organ of sight. The eye has a number of components. These components include but are not limited to the cornea, iris, pupil, lens, retina, macula, optic nerve, choroid and vitreous.
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Right Ventricular Biopsy
The removal of a small piece of heart tissue from your right ventricle. This tissue sample is studied under a microscope to help your doctor assess your heart muscle.
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Retinal layers
Retinal layers are: Outer nuclear layer - Contains photoreceptors; Inner nuclear layer - Contains bipolar, horizontal and amacrine cells; Ganglion cell layer - Contains ganglion cells; Outer plexiform layer - Contains processes of receptor, bipolar and horizontal cells; Inner plexiform layer - Contains processes of bipolar, amacrine and ganglion cells.
Retinex Theory
Theory of lightness and color perception. Argues that the color of an object is not determined by the composition of the light coming from the object. The color of a unit area is determined by a trio of numbers each computed on a single waveband to give the relationship for the waveband between the unit area and the rest of the unit areas in a visual scene.
Retinotectal pathway
Pathway from the retina to superior colliculi.
Retinotopic map
A preservation of the spatial relationships of the photoreceptors in the retina in a higher brain representation.
Rhodopsin
The visual pigment in rod cells. Contains opsin and retinal.
Right visual hemifield
Rivalry
When two different images are presented to the two eyes simulataneously, a mosaic-like percept can be obtained, in which different regions of the image correspond to left and right eye images.
Rod
Photoreceptor for dim light conditions. Achromatic, lower acuity and temporal resolution than cones, outnumber cones 20 to 1. Rod system is convergent (many rods target one bipolar cell). See also Cone.
Reniform
Shaped like a kidney.
Resilient
Having the ability to return to an original shape after having been compressed or deformed.
Rationalization
A defense mechanism, operating unconsciously, in which an individual attempts to justify or make consciously tolerable by plausible means, feelings or behavior that otherwise would be intolerable. Not to be confused with conscious evasion or dissimulation. See also projection.
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