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

A difference in refractive error between the two eyes, both of which are myopic.

A difference in vision between the two eyes.

1. Partial color blindness in which both red and green are poorly recognized.
2. A form of color blindness where reds and greens look much the same.

Absence of sight; especially, when due to a structured defect in or absence of an eye (or eyes).

Distorted vision in which straight lines appear as curves or angles, and symmetry is incorrectly perceived; without correct vision.

A difference in the refractive error (deviation from optimal focusing of light) of the two eyes; such as, hyperopia (farsightedness) in one eye with myopia (nearsightedness) in the other.

1. Suppression amblyopia or "lazy eye".
2. Amblyopia due to long disuse of the eye.

In amblyopia, the brain favors one eye over the other. The other eye is ignored. It is not adequately stimulated and the visual brain cells do not mature normally. Amblyopia is the most common cause of monocular blindness, partial, or complete blindness in one eye.

Eye weakness, or strain; often causing headache, ocular discomfort, dimness of vision, etc.

1. Personal observation.
2. An ocular view.
3. A postmortem examination.

1. An exhaustive critical personal examination or inspection of something.
2. The medical examination of a dead body in order to establish the cause and circumstances of death; also referred to as, "remains to be seen".

Another definition of autopsy: the examination, after death, of an animal body, usually human, with the intent of determining the cause of death, the extent of a disease or injuries, the effect of therapy, and the existence of any previously unrecognized antemortem pathological condition.

Also known as: necropsy, necroscopy, sectio cadaveris, thanatopsy, thanatopsia, necrotomy, postmortem, ptomatopsy, and ptomatopsia.

A defect of vision in which the retina fails to respond to yellow.

1. The drooping of the upper eyelid resulting from paralysis.
2. Drooping of an upper eyelid because of paralysis.

Causes include aging, diabetes, stroke, Horner's syndrome (nerve condition which involves a dropping eyelid), myasthenia gravis (fatigue of certain voluntary muscle groups), brain tumor or cancer.

Bad eyesight, or bad vision, of any kind.

A North American annual plant (Coreopsis tinctoria) widely cultivated for its beautiful showy flower heads with yellow rays and purple-red to brownish centers.

A condition resulting from paralysis of the extensor muscles of the hand and fingers; or paralysis of the extensor muscles of the wrist and fingers causing the hand to hang down at the wrist.