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Mod F Unit 2 Optical

Teacher: Ms. Tiffiny
Across
Horizontal placement of prism such that the base is toward the side of the head.
Vertical placement of prism such that the base is at 90 degrees on a degree scale.
The retinal image in the deviating eye in strabismus
That point on an ophthalmic prescription lens through which no prismatic effect is manifested.
A synonym for horizontal midline
Three dimensional vision possible only when binocular vision and fusion are present.
Grinding a portion of a lens so as to add a second optical center. It is often used to create vertical prism in the lower portion of one lens for the purpose of alleviating vertical imbalance at near. (Synonym: slabbing-off)
The retinal image in the normally fixating eye in strabismus
Highest quality of vision in which there is simultaneous perception, fusion, and stereopsis.
An imaginary reference line used to specify cylinder or spherocylinder lens orientation and corresponding to the meridian perpendicular to that of maximum cylinder power.
The condition whereby one eye is pointed in a different direction than the other eye.
Vertical placement of prism such that the base is at 270 degrees on a degree scale
A rule that states that the decentration of a lens in centimeters times the power of the lens is equal to the prismatic effect:
: The displacement of a lens optical center away from the wearer's line of sight for the purpose of creating a prismatic effect.
Down
Vision in which there is simultaneous perception
Horizontal placement of prism such that the base is toward the nose
A slab-off lens that has base-down prism below the slab line, instead of base up.
The process of combining two or more prisms to obtain the equivalent prismatic effect expressed as a single prism.
A schematic representation on which the two major meridians of a lens or lens surface are depicted.
segment A 10-mm deep ribbon-style segment containing a prismatic effect for near. The ribbon segment extends to the nasal edge of the lens blank
A system of lens measurement based on the enclosure of a lens by horizontal and vertical tangents to form a box or rectangle.
: Binocular process in which each eye exerts the effort to fixate on the same object