| eye | <zoology> A brood; as, an eye of pheasants. Origin: Prob. Fr. Nye, an eye being for a nye. See Nye. 1. The organ of sight or vision. In man, and the vertebrates generally, it is properly the movable ball or globe in the orbit, but the term often includes the adjacent parts. In most invertebrates the years are immovable ocelli, or compound eyes made up of numerous ocelli. See Ocellus. Description of illustration: a b Conjunctiva; c Cornea; d Sclerotic; e Choroid; f Cillary Muscle; g Cillary Process; h Iris; i Suspensory Ligament; k Prosterior Aqueous Chamber between h and i; l Anterior Aqueous Chamber; m Crystalline Lens; n Vitreous Humor; o Retina; p Yellow spot; q Center of blind spot; r Artery of Retina in center of the Optic Nerve. The essential parts of the eye are inclosed in a tough outer coat, the sclerotic, to which the muscles moving it are attached, and which in front changes into the transparent cornea. A little way back of cornea, the crystalline lens is suspended, dividing the eye into two unequal cavities, a smaller one in front filled with a watery fluid, the aqueous humor, and larger one behind filled with a clear jelly, the vitreous humor. The sclerotic is lined with a highly pigmented membrane, the choroid, and this is turn is lined in the back half of the eyeball with the nearly transparent retina, in which the fibres of the optic nerve ramify. The choroid in front is continuous with the iris, which has a contractile opening in the center, the pupil, admitting light to the lens which brings the rays to a focus and forms an image upon the retina, where the light, falling upon delicate structures called rods and cones, causes them to stimulate the fibres of the optic nerve to transmit visual impressions to the brain. 2. The faculty of seeing; power or range of vision; hence, judgment or taste in the use of the eye, and in judging of objects; as, to have the eye of sailor; an eye for the beautiful or picturesque. 3. The action of the organ of sight; sight, look; view; ocular knowledge; judgment; opinion. "In my eye, she is the sweetest lady that I looked on." (Shak) 4. The space commanded by the organ of sight; scope of vision; hence, face; front; the presence of an object which is directly opposed or confronted; immediate presence. "We shell express our duty in his eye." (Shak) "Her shell your hear disproved to her eyes." (Shak) 5. Observation; oversight; watch; inspection; notice; attention; regard. "Keep eyes upon her." "Booksellers . . . Have an eye to their own advantage." (Addison) 6. <zoology> That which resembles the organ of sight, in form, position, or appearance; as: The spots on a feather, as of peacock. The scar to which the adductor muscle is attached in oysters and other bivalve shells; also, the adductor muscle itself, especially. When used as food, as in the scallop. The bud or sprout of a plant or tuber; as the eye of a potato. The center of a target; the bull's-eye. A small loop to receive a hook; as hooks and eyes on a dress. The hole through the head of a needle. A loop forming part of anything, or a hole through anything, to receive a rope, hook, pin, shaft, etc.; as an eye at the end of a tie bar in a bridge truss; as an eye through a crank; an eye at the end of rope. The hole through the upper millstone. 7. That which resembles the eye in relative importance or beauty. "The very eye of that proverb." . "Athens, the eye of Greece, mother of arts." (Milton) 8. Tinge; shade of colour. "Red with an eye of blue makes a purple." (Boyle) By the eye, in abundance. Elliott eye, in a direction opposed to the wind; as, a ship sails in the eye of the wind. Origin: OE. Eghe, eighe, eie, eye, AS. Eage; akin to OFries. Age, OS. Ga, D. Oog, Ohg. Ouga, G. Auge, Icel. Auga, Sw. Oga, Dan. Oie, Goth. Aug; cf. OSlav. Oko, Lish. Akis, L. Okulus, Gr, eye, the two eyes, Skr. Akshi. 10. Cf. Diasy, Ocular, Optic, Eyelet, Ogle. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| eye abnormalities | Congenital absence of or defects in structures of the eye; may also be hereditary. (12 Dec 1998) |
| eye bank | A place where corneas of eyes removed after death are preserved for subsequent keratoplasty. (05 Mar 2000) |
| eye banks | Centres for storing various parts of the eye for future use. (12 Dec 1998) |
| eye burns | Injury to any part of the eye by extreme heat, chemical agents, or ultraviolet radiation. (12 Dec 1998) |
| eye capsule | A condensation of connective tissue on the outer aspect of the sclera from which it is separated by a narrow cleftlike episcleral space; the sheath is attached to the sclera near the sclerocorneal junction and blends with the fascia of the extraocular muscles. Synonym: vagina bulbi, capsula bulbi, eye capsule, fascia bulbi, sheath of eyeball, Tenon's capsule, vagina oculi. (05 Mar 2000) |
| eye colour | Colour of the iris. (12 Dec 1998) |
| eye cup | A small oval receptacle used to apply a liquid to the external eye. (05 Mar 2000) |
| eye diseases, hereditary | Transmission of gene defects or chromosomal aberrations/abnormalities which are expressed in extreme variation in the structure or function of the eye. These may be evident at birth, but may be manifested later with progression of the disorder. (12 Dec 1998) |
| eye drops | See: eyewash, ophthalmic solutions. (05 Mar 2000) |
| eye enucleation | The surgical removal of the eyeball leaving the eye muscles and remaining orbital contents intact. (12 Dec 1998) |
| eye evisceration | The surgical removal of the inner contents of the eye, leaving the sclera intact. It should be differentiated from orbit evisceration which removes the entire contents of the orbit, including eyeball, blood vessels, muscles, fat, nerve supply, and periosteum. (12 Dec 1998) |
| eye floaters | One or more spots that appear to drift in front of the eye, caused by a shadow cast on the retina by vitreous debris or separation of the vitreous humour from the retina. (27 Sep 1997) |
| eye haemorrhage | Intraocular haemorrhage from the vessels of various tissues of the eye, e.g., choroidal haemorrhage and retinal haemorrhage. It is to be differentiated from retrobulbar haemorrhage which refers to haemorrhage within the orbital cavity behind the eye. (12 Dec 1998) |
| eye infections | Infection, moderate to severe, caused by bacteria, fungi, or viruses, which occurs either on the external surface of the eye or intraocularly with probable inflammation, visual impairment, or blindness. (12 Dec 1998) |
| accessory organs of the eye | The eyelids, with lashes and eyebrows, lacrimal apparatus, conjunctival sac, and extrinsic muscles of the eyeball. Synonym: organa oculi accessoria, accessory organs, accessory visual apparatus, adnexa oculi, appendages of eye. (05 Mar 2000) |
|---|---|
| accommodation of eye | The increase in thickness and convexity of the eye's lens in order to focus the image of an external object upon the retina. (05 Mar 2000) |
| amaurotic cat's eye | A yellow reflex from the pupil in cases of retinoblastoma or pseudoglioma. (05 Mar 2000) |
| anterior chamber of eye | The space between the cornea anteriorly and the iris/pupil posteriorly, filled with a watery fluid (aqueous humor) and communicating through the pupil with the posterior chamber. Synonym: camera anterior bulbi, camera oculi anterior, camera oculi major. (05 Mar 2000) |
| anterior eye segment | That part of the eyeball anterior to the lens. (12 Dec 1998) |
| antibiotic eye drops | <pharmacology> A medication that is pH balanced to allow placement into the eye for the purpose of killing bacteria. Examples include: Bleph-10, Chloromycetin, Cortisporin-Ophthalmic, Gantrisin, Genoptic, Gentacidin, Garamycin, Gantrisin, Ilotycin, Sodium Sulamyd and Sulphair. (27 Sep 1997) |
| aphakic eye | The eye from which the lens is absent. (05 Mar 2000) |
| appendages of eye | The eyelids, with lashes and eyebrows, lacrimal apparatus, conjunctival sac, and extrinsic muscles of the eyeball. Synonym: organa oculi accessoria, accessory organs, accessory visual apparatus, adnexa oculi, appendages of eye. (05 Mar 2000) |
| artificial eye | A curved disk of opaque glass or plastic, containing an imitation iris and pupil in the centre, inserted beneath the eyelids and supported by the orbital contents after evisceration or enucleation; it may be ready-made (stock) or custom-made. (05 Mar 2000) |
| bird's-eye | <botany> A plant with a small bright flower, as the Adonis or pheasant's eye, the mealy primrose (Primula farinosa), and species of Veronica, Geranium, etc. Source: Websters Dictionary (01 Mar 1998) |
| black eye | Ecchymosis of the lids and their surroundings. (05 Mar 2000) |
| bleary eye | Sore, runny, watery eye with an associated lackluster appearance and, by extension, dimness of vision. (05 Mar 2000) |
| blue-eye | <zoology> The blue-cheeked honeysucker of Australia. Source: Websters Dictionary (01 Mar 1998) |
| bovine cancer eye | A malignant squamous cell carcinoma of cattle, especially the Hereford breed, that originates in the conjunctival mucous membranes or the surrounding skin; it occurs principally in range cattle having unpigmented skin around the eye and living in regions of intense sunlight. (05 Mar 2000) |
| bulb of eye | The eye proper without the appendages. Synonym: bulbus oculi, bulb of eye, globe of eye. (05 Mar 2000) |