op-, opt-, optico-, opsi-, opso-, -opia, -ops, -opsia, -opsis, -opsy, -optic, -opic, -opy

(Greek: eye[s]; sight; see, vision)

fiber optics, optical fiber
A branch of optical technology dealing with systems that transmit light signals and images over short, and long, distances through the use of optical fibers (transparent, hair-thin strands of glass or plastic).

These fibers have a wide range of applications; such as, in the transmission of computer data, telephone messages, and other communications.

half vision, hemianopia
1. The blindness in one half of the visual field of one or both eyes; usually applied to bilateral defects caused by a single lesion.
2. Bilateral or unilateral blindness in one-half of the field of vision; half blindness.
hemianopsia, hemianopia, hemiamaurosis, hemiamblyopia
1. Defective vision, or blindness, in half of the visual field; usually applied to bilateral defects caused by a single lesion.
2. Any of several conditions in which there is blindness in half of the visual field, involving one or both eyes.
A reference to having blindness in one-half of the visual field.
The state, or condition, of the eyes in which there are differences in degrees of refraction; or the ability of the eyes to change the direction of light in order to focus it on the retina.
1. Unequal vision in the two eyes.
2. Inequality of vision in both eyes.
1. An excessively wide opening of the eyes.
2. Very large palpebral (eyelid) apertures (openings), both in width and height.
An abnormal condition of the eye in which vision is better for distant objects than for near objects.

It results from the eyeballs being too short from front to back, causing images to be focused behind the retinas. Also known as "farsightedness".

Farsightedness; the ability to see distant objects more clearly than close objects.
incomplete hemianopia
Blindness in less than half of the visual field of each eye.
A reference to the distance between the eyes.
The distance between the eyes.
Displacement of the pupil of the eye.
Visual defects of the iris in the eyes in which objects appear surrounded by rings of colored light.
A condition in which both eyes have equal refractive power (capable of changing the direction of a light).

If, for example, one eye is myopic (nearsighted), so is the other; or if one eye is hyperopic (farsighted), so is the other one; or both eyes may have normal refractive power.

Related references to "eye" or "eye part" word families: blepharo-; core-; corneo-; eye, eyes; irido-; lenti-, lens-; lenticulo-; ocelli-; oculo-; ophthalmo-; phaco-; pupillo-; retino-; uveo-.

Cross references of word families that are related directly, or indirectly, to: "appear, visible, visual, manifest, show, see, reveal, look": blep-; delo-; demonstra-; -orama; pare-; phanero-; phant-; pheno-; scopo-; spec-; vela-, veal-; video-, visuo-.