optic axis
— Noun
– English
～ 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"
optic cup
— Noun
– English
～ (embryology) a two-walled cuplike depression that develops into the pigmented and sensory layers of the retina
optic
— Adjective
– English
～ relating to or using sight; "ocular inspection"; "an optical illusion"; "visual powers"; "visual navigation"
optic
— Adjective
– English
～ of or relating to or resembling the eye; "ocular muscles"; "an ocular organ"; "ocular diseases"; "the optic (or optical) axis of the eye"; "an ocular spot is a pigmented organ or part believed to be sensitive to light"; "ophthalmic defect"
optical fiber
— Noun
– English
～ a very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images
optical flint
— Noun
– English
～ optical glass of high dispersion and high refractive index
optical crown
— Noun
– English
～ optical glass of low dispersion and low refractive index
optical glass
— Noun
– English
～ clear homogeneous glass of known refractive index; used to make lenses
optical density
— Noun
– English
～ (physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation
optical disk
— Noun
– English
～ a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface
optical bench
— Noun
– English
～ apparatus for observation and measurement of optical phenomena
optical fusion
— Noun
– English
～ the combining of images from the two eyes to form a single visual percept
optical device
— Noun
– English
～ a device for producing or controlling light
optical disc
— Noun
– English
～ a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface
optical condenser
— Noun
– English
～ lens used to concentrate light on an object
optical aberration
— Noun
– English
～ an optical phenomenon resulting from the failure of a lens or mirror to produce a good image
optical illusion
— Noun
– English
～ an optical phenomenon that results in a false or deceptive visual impression