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A fixation disparity is not constant within a certain observer, but can vary depending on the viewing conditions. If test prisms with increasing amount are placed in front of the observer’s eyes, the fixation disparity changes in the eso direction with base-in prisms and in the exo direction with base-out prisms (Fig. 3).
The Maddox rod test can be used to subjectively detect and measure a latent, manifest, horizontal or vertical strabismus for near and distance. The test is based on the principle of diplopic projection. [1] Dissociation of the deviation is brought about by presenting a red line image to one eye and a white light to the other, while prisms are ...
Exophoria. Exophoria is a form of heterophoria in which there is a tendency of the eyes to deviate outward. [1] During examination, when the eyes are dissociated, the visual axes will appear to diverge away from one another. [2] The axis deviation in exophoria is usually mild compared with that of exotropia.
The prism fusion range (PFR) or fusional vergence amplitude is a clinical eye test performed by orthoptists, optometrists, and ophthalmologists to assess motor fusion, specifically the extent to which a patient can maintain binocular single vision (BSV) in the presence of increasing vergence demands. Motor fusion is largely accounted to ...
Rosette – cluster of leaves with very short internodes that are crowded together, normally on the surface of the soil but sometimes higher on the stem. Rostellate – like a rosette (cf. rostellum). Rosulate – arranged into a rosette. Runner – an elongated, slender branch that roots at the nodes or tip.
Rosette (botany) A rosette of leaves at the base of a dandelion. Rosette growth form of the liverwort Ricciocarpos natans. In botany, a rosette is a circular arrangement of leaves or of structures resembling leaves. In flowering plants, rosettes usually sit near the soil. Their structure is an example of a modified stem in which the internode ...
Rafflesia titan Jack. Rafflesia arnoldii, the corpse flower, [2] or giant padma, [3] is a species of flowering plant in the parasitic genus Rafflesia. It is noted for producing the largest individual flower on Earth. [4] It has a strong and unpleasant odor of decaying flesh. [5] It is native to the rainforests of Sumatra and Borneo. [6]
The reddish stems of this herbaceous perennial are usually simple, erect, smooth, 0.5–2.5 metres (1 + 1 ⁄ 2 –8 feet) high with scattered alternate leaves.The leaves are spirally arranged, entire, narrowly lanceolate, and pinnately veined, the secondary leaf veins anastomosing, joining together to form a continuous marginal vein just inside the leaf margins. [2]: