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compound eye
compound eye The eye of insects and crustaceans, which consists of numerous visual units, the ommatidia. Each ommatidium consists of an outer cuticle covering a lens, beneath which are 6–8 retinal cells surrounding a light-sensitive rhabdom. Adjacent ommatidia are separated by pigment cells.... Read more |
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Eye-hand coordination
Hand-eye coordination Definition Hand-eye coordination is the ability of the vision system to coordinate the information received through the eyes to control, guide, and direct the hands in the accomplishment of a given task, such as handwriting or catching a ball. Hand-eye... Read more |
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simple eye
simple eye Eye consisting of a single ocellus. Such eyes are found in adult insects, and in the larvae of hemimetabolous insects. Usually there are three, arranged triangularly on the head. Simple eyes are not thought to be involved in the formation of images, but act only as monitors of the level... Read more |
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Amblyopia
Amblyopia Definition Amblyopia refers to diminished vision in either one or both eyes, for which no cause can be discovered upon examination of the eye. Amblyopia is the medical term used when the vision in one of the eyes is reduced because the eye and the brain are not... Read more |
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squint
squint Eye contact is essential for effective social intercourse. This ranges from the parental insistence that an erring child should ‘Look at me when I'm talking to you’ to the speaker who must look at his audience, even if it is via a TV camera, to keep their attention. Avoiding eye... Read more |
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eye of storm
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Eye muscle surgery
Eye muscle surgery Definition Eye muscle surgery is performed to weaken, strengthen, or reposition any of the extraocular muscles (small muscles) located on the surface of the eye that move the eyeball in all directions. Purpose The extraocular muscles attach via tendons to the... Read more |
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pineal eye
pineal eye (epiphysial eye, median eye) In Sphenodontidae (tuatara), some lizards, Petromyzonidae (lamprey), and many fossil vertebrates, a structure on the top of the head that resembles an eye, with a lens and a retina, linked to the brain by a nerve. It is the larger and more developed of a pair... Read more |
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strabismus
strabismus , inability of the eyes to focus together because of an imbalance in the muscles that control eye movement; also called squint. It is a consequence of weakness or uneven development of one or more of the six small muscles that surround the eye. One or both eyes may be affected.... Read more |
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Albinism
Albinism Definition Albinism is an inherited condition that is present at birth. It is characterized by a lack of melanin, the pigment that normally gives color to the skin, hair, and eyes. Many types of albinism exist, all of which involve lack of pigment in varying... Read more |
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BUDGET SURPLUS SEEN AS BARTER FOR VOTES SOME VA. LAWMAKERS ARE WARY THAT A...
...Republican legislators two weeks ago...growing at an eye-popping 11...growth, many legislators believe the...lawmakers are wary that promises...do you stop giving money back...million. The governor already has...put in the budget and the first...said. The governor said ... |
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Texas school funding unresolved; Legislature, governor end third year with no...
...session in which legislators argued about lewd...iron out a bill the governor could sign. Both...program statewide, giving teachers often...Perry, with a wary eye toward Washington...129 billion state budget, enacted stricter... |
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As Brazil goes. . .(Commentary)(Editorials)
...and a gaping budget and current...package buys legislators borrowed time...Lopes, giving a very false...investors' eyes, endangered...The state governor of Minas Gerais...investors wary that other state governors could follow...this year. Legislators must ... |