eye axis definition
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axis optic axis. 1. a line connecting the center of the anterior curvature of the cornea (anterior pole) with that of the posterior curvature of the sclera (posterior pole). 2. the hypothetical straight line passing through the centers of curvature of the front and back surfaces of a simple lens.
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What does the axis mean in prescription for glasses? This describes the lens meridian that contains no cylinder power to correct astigmatism. The axis is defined with a number from 1 to 180. The number 90 corresponds to the vertical meridian of the eye, and the number 180 corresponds to the horizontal meridian.
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- With a drainage area of about 42,865 square miles, it is the second-largest river basin in Texas, after the Rio Grande. It flows directly into the Gulf southwest of Freeport in Brazoria County. Its average annual flow exceeds 6 million acre-feet, the largest volume of any river in the state.
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- Define axis: a straight line about which a body or a geometric figure rotates or may be supposed to rotate — axis in a sentence a straight line about which a body or a geometric figure rotates or may be supposed to rotate…
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optic axis sagittal axis an imaginary line extending through the anterior and posterior poles of the eye. visual axis an imaginary line passing from the midpoint of the visual field to the fovea centralis. Axes of the eye. From Dorland's , 2000.
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- In theory, the higher a player's plus/minus score, the better the player. For each player (except the goalie) who is on the ice when a goal is scored by the opposing team is rated a -1. Conversely, every player on the ice when their own team scores a goal (except the goalie) is rated a +1. A player who is rated a + 13 for example, has been on the ice during 13 more goals scored for his team than against it. Shorthanded and powerplay goals are not counted in plus/minus ratings.   Hockey players are assigned a PLUS or MINUS stat, based on their play.
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axis 1 Plural axes (ăk′sēz′) 1. An imaginary line around which an object rotates. In a rotating sphere, such as the Earth and other planets, the two ends of the axis are called poles. 2. Mathematics. a. A line, ray, or line segment with respect to which a figure or object is symmetrical.
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What is the x axis: definitions of the main terms required for understanding the coordinate systems The x axis is a horizontal line and the y axis, which is perpendicular to the x axis, is a vertical line. The rectangular coordinate system that can be sued for determination of the concrete position of some geometric figure in the three-dimensional space requires selecting three mutually perpendicular lines: x axis, y axis and z axis.
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axis 1 axis1. 1  the line about which a rotating body, such as the earth, turns. 2  Mathematics. a central line that bisects a two-dimensional body or figure. a line about which a three-dimensional body or figure is symmetrical. 3  Anatomy. a central or principal structure, about which something turns or is arranged: the skeletal axis. the second cervical vertebra.
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Axis Definition of Axis. An Axis is a line about which a figure is drawn, measured, rotated, etc. The horizontal line and the vertical line on a coordinate plane are known as the X-axis and the Y-axis respectively.
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- One more number will be the axis of the astigmatism. To acquire your eyeglass prescription correct, the physician should not merely figure out how much astigmatism you could have, but what axis your eye has. Astigmatism means your eye is not spherical. Axis determines at what angle your eye rests. Imagine holding a football on its point, then leaning it to a single side or another for a 90-degree angle. The axis inside your prescription determines this angle inside your eye. The difference between Freeform and classical progressive lenses.
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Axis Tilt is Critical for Life Axis Tilt is Critical for Life. The tilt of the Earth's spin axis with respect to the plane of its orbit about the sun (the ecliptic plane) is important for a habitable Earth. The Earth's spin axis is tilted 23.5° with respect to the ecliptic, giving moderate seasons and preventing temperature extremes anywhere on the planet. This illustration, patterned after Ward and Brownlee, summarizes the effects of different tilt angles with respect to the ecliptic plane.
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esotropia strabismus in which there is manifest deviation of the visual axis of one eye toward that of the other eye, resulting in diplopia; called also cross-eye and convergent strabismus. adj., adj esotrop´ic.
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- Axis IV is part of the DSM multiaxial system for assessment. The five axis model is designed to provide a comprehensive dia... The information provided on the PsyWeb.com is designed to support, not replace, the relationship that exists between a patient/site visitor and his/her health professional.
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- Human Vision Explore how images are produced on the retina of the human eye as an object is moved closer or farther away. A particularly specialized component of the eye is the fovea centralis, which is located on the optical axis of the eye in an area near the center of the retina.
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- The Axis is the last number in a formula for astigmatism. This is a number anywhere between 0 and 180, and is measured in degrees. The axis denotes the position of the astigmatism as far as where it is taking place in the curve of the eye.
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axis principal axis, optic axis-a line that passes through the center of curvature of a lens so that light is neither reflected nor refracted; in a normal eye the optic axis is the direction in which objects are seen most distinctly.
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longitudinal axis longitudinal axis. A straight line running fore and aft through the center of gravity. It is horizontal when the airplane is in the rigging position. The aircraft rolls about this axis. See axes.
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- The Vertex axis is a point of energy derived from the intersection of the Prime Vertical and the Ecliptic. The West side of this point is called the Vertex, the East side is called the Anti-Vertex. The Ascendant-Descendant axis is found by the points of intersection of the Great Circles of the Ecliptic and Horizon.
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- Everyday is a single word and is an adjective, so it’s the one that is used in front of a noun to describe something as normal or commonplace. Every day is an adjective (every) plus a noun (day), and it means each day. More English Mistakes. 1  Affect vs Effect.  Farther vs Further.
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eye Definition of eye for Students. 1 : the organ of seeing that in vertebrates is a round organ filled with a jellylike material, is located in a bony cavity in the skull, and has a lens which focuses light on the retina.
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- Obliquity redirects here. For the book, see Obliquity (book). In astronomy, axial tilt, also known as obliquity, is the angle between an object's rotational axis and its orbital axis, or, equivalently, the angle between its equatorial plane and orbital plane. It differs from orbital inclination.
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Exotropia in Children and Adults Exotropia is a common type of strabismus that occurs when misaligned eyes deviate outward. Exotropia (also known as wall-eye or divergent strabismus) differs from its opposite form, esotropia (eye turns in toward nose), in that exotropic eyes point outward or away from the nose. Exotropia can occur in one or both eyes.
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eye eye. 1. The organ of the body with which an animal is able to see or sense light. In vertebrate animals, the eye occurs as one of a pair, each consisting of a spherical structure that is filled with fluid. Incoming light is refracted by the cornea and transmitted through the pupil to the lens, which focuses the image onto the retina. See more at compound eye, eyespot.
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Vision (eyesight): What does spherical, cylindrical, and axis mean in an eyeglass prescription? OD is thus right eye. 1  The cornea is the outer cover of the eye's hole allowing light in. 2  The iris is the muscle that pulls the opening in the eye (the pupil) open (the coloured bit).  The lens is like an internal pair of glasses that focuses the light that comes through the cornea onto the retina.
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Diagnostic and Statistical Manual of Mental Disorders Axis IV. Axis IV is part of the DSM multiaxial system for assessment. The five axis model is designed to provide a comprehensive diagnosis that includes a complete picture of not just acute symptoms but of the entire scope of factors that account for a patient's mental health. This page explains DSM Axis IV. Axis IV Psychosocial and Environmental Problems