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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).
leaf base. Triangular, wedge-shaped, stem attaches to point. cuneiform. whole leaf. Narrowly triangular, widest on the opposite end from the stem, with the corners at that end rounded. cuspidate. cuspidatus. leaf tip. With a sharp, elongated, rigid tip; tipped with a cusp.
Autumn leaf color is a phenomenon that affects the normally green leaves of many deciduous trees and shrubs by which they take on, during a few weeks in the autumn season, various shades of yellow, orange, red, purple, and brown. [1] The phenomenon is commonly called autumn colours[2] or autumn foliage[3] in British English and fall colors, [4 ...
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.
Claret ash is a cultivar of Caucasian ash, derived from a natural seedling variant. [1] Caucasian ash is a subspecies of narrow-leaved ash, Fraxinus angustifolia. Claret ash grows to around 15–20 m (49–66 ft) and has dark green leaves that turn to a dark red claret in the autumn. The bark of the tree is notably smoother than other Caucasian ...
A Canarium strictum tree in red leaf flush. Leaf flushing or leaf out is the production of a flush of new leaves typically produced simultaneously on all branches of a bare plant or tree. Young leaves often have less chlorophyll and the leaf flush may be white or red, the latter due to presence of pigments, particularly anthocyanins. [1]
Prunus sargentii is a deciduous tree that grows 20–40 ft (6.1–12.2 m) tall and broad. New growth is a reddish or bronze color, changing to shiny dark green. [5] The obovate leaves with serrated margins are 3–5 inches (7.6–12.7 cm) in length and are arranged alternately. In fall, the leaves turn red, orange, or yellow. [6]
Viburnum furcatum, the forked viburnum or scarlet leaved viburnum, [1] is a species of flowering plant in the family Adoxaceae (formerly Caprifoliaceae). Growing to 4 m (13 ft) tall and broad, it is a substantial deciduous shrub with rounded oval bronze-green leaves, turning red in autumn. Scented white flower-heads resembling those of lacecap ...