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Optical Glass Lens Coating Variation Collection
Installing Internet Cable and Telephone Network System, Technician on ladder is Repairing and Maintenance Fiber Optic lines in Splitter Box on Electric Pole against Blue Sky Background
Helmholtz triangles and squares optical illusions. Equilateral triangle with horizontal lines appear higher (A), with angled lines it seems to move right (B). A square appears higher (C) or wider (D).
Intersection of opposite luminescent lines Collision speed force sense technology background.
Eyeglasses closeup. Spectacles in woman's hands. Presenting glasses. Zoom in

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