| GAPO | growth retardation, alopecia, pseudo-anodontia, and optic atrophy [syndrome] |
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| GOND | glaucomatous optic nerve damage |
| IOA | inner optic anlage; International Osteopathic Association |
| ION | ischemic optic neuropathy |
| IOT | intraocular tension; intraocular transfer; ipsilateral optic tectum |
| optic neuropathy, ischemic | A severely blinding disease resulting from loss of the arterial blood supply to the optic nerve as a result of occlusive disorders of the nutrient arteries. Optic neuropathy is divided into anterior, which causes a pale oedema of the optic disk, and posterior, in which the optic disk is not swollen and the abnormality occurs between the globe and the optic chiasm. Ischemic anterior optic neuropathy usually causes a loss of vision that may be sudden or occur over several days; ischemic posterior optic neuropathy is uncommon and the diagnosis depends largely upon exclusion of other causes, chiefly stroke and brain tumour. (12 Dec 1998) |
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| optic papilla | The portion of the optic nerve seen in the fundus with the ophthalmoscope. It is formed by the meeting of all the retinal ganglion cell axons as they enter the optic nerve. Because the retina at the optic disk has no photoreceptors there is a corresponding blind spot in the visual field. (12 Dec 1998) |
| optic part of retina | The internal layer of the retina containing the neural elements, as distinguished from the outer leaf of the retina, or pigmented layer. Synonym: pars optica retinae, neural layer of retina, optic part of retina, stratum cerebrale retinae. (05 Mar 2000) |
| optic pit | A congenital structural defect of the optic nerve head. (05 Mar 2000) |
| optic placodes | Paired ectodermal placode's that become invaginated to form the embryonic lens vesicles. Synonym: optic placodes. (05 Mar 2000) |
| optic radiation | The massive, fanlike fibre system passing from the lateral geniculate body of the thalamus to the visual cortex (striate or calcarine cortex, area 17 of Brodmann); the fibres follow the retrolenticular and sublenticular limbs of the internal capsule into the corona radiata but they curve back along the lateral wall of the temporal and occipital horns of the lateral ventricle to the striate cortex on the medial surface and pole of the occipital lobe. Synonym: radiatio optica, geniculocalcarine radiation, geniculocalcarine tract, Gratiolet's fibres, Gratiolet's radiation, occipitothalamic radiation, Wernicke's radiation. (05 Mar 2000) |
| optic recess | A diverticulum extending forward from the anterior part of the third ventricle above the optic chiasm. Synonym: recessus opticus. (05 Mar 2000) |
| optic sign | <microscopy> For uniaxial materials, by definition, the sign is positive if the value epsilon minus omega is positive, and negative if epsilon - omega is negative. For biaxial materials, the sign is positive if gamma is the acute bisectrix, and negative if alpha is the acute bisectrix, or positive if gamma - beta greater than beta - alpha and negative if gamma - beta less than beta - alpha (05 Aug 1998) |
| optic stalk | The constricted proximal portion of the optic vesicle in the embryo; it develops into the optic nerve. Pineal stalk, the attachment of the pineal body to the roof of the third ventricle; it contains the pineal recess of the third ventricle. Pituitary stalk, a process comprising the tuberal part investing the infundibular stem that attaches the hypophysis to the tuber cinereum at the base of the brain. Yolk stalk, the narrowed connection between the intraembryonic gut and the yolk sac; its walls are splanchnopleure. Synonym: umbilical duct, vitelline duct, vitellointestinal duct. (05 Mar 2000) |
| optic tectum | <anatomy> A region of the midbrain in which input from the optic nerve is processed. Because the retinally derived neurons of the optic nerve map onto the optic tectum in a defined way, the question of how this specificity is determined has been a long standing problem in cell biology. Although there is some evidence for adhesion gradients and for some adhesion specificity, the problem is unresolved. (11 Jan 1998) |
| optic tract | The continuation of the optic nerve fibres beyond (behind) the latter's hemidecussation in the optic chiasm; each of the two symmetrical optic tracts is composed of fibres originating from the temporal half of the retina of the ipsilateral eye and a nearly equal number of fibres from the nasal half of the contralateral retina; it forms a compact, somewhat flattened fibre band passing caudolaterally alongside the base of the hypothalamus and over the basal surface of the crus cerebri; most of its fibres terminate in the lateral geniculate body; a smaller number of fibres enter the brachium of the superior colliculus, to terminate in the superior colliculus and the pretectal region. Synonym: tractus opticus. (05 Mar 2000) |
| optic vesicle | In the embryo, one of the paired evaginations from the ventrolateral walls of the forebrain from which the sensory and pigment layers of the retina develop. Synonym: vesicula ophthalmica, ocular vesicle, optic vesicle. (05 Mar 2000) |
| optical | 1. Of or pertaining to vision or sight. "The moon, whose orb Through optic glass the Tuscan artist views." (Milton) 2. Of or pertaining to the eye; ocular; as, the optic nerves (the first pair of cranial nerves) which are distributed to the retina. 3. Relating to the science of optics; as, optical works. <optics> Optic angle, a graduated circle used for the measurement of angles in optical experiments. Optical square, a surveyor's instrument with reflectors for laying off right angles. Origin: F. Optique, Gr.; akin to sight, I have seen, I shall see, and to the two eyes, face, L. Oculus eye. See Ocular, Eye, and cf. Canopy, Ophthalmia. Source: Websters Dictionary (01 Mar 1998) |
| optical aberration | Failure of rays from a point source to form a perfect image after traversing an optical system. (05 Mar 2000) |
| optical activity | The ability of a material to rotate the plane of polarized light. (09 Oct 1997) |
| lenticulo-optic | Relating to the lentiform nucleus and the optic tract; specifically refers to branches of the middle cerebral artery considered to supply these structures. (05 Mar 2000) |
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Synonyms : Adult Optic Nerve Glioma, Childhood Optic Nerve Glioma, Glioma, Optic Nerve, Adult, Glioma, Optic Nerve, Childhood, Malignant Optic Nerve Astrocytoma, Optic Glioma, Optic Nerve Glioma, Adult, Optic Nerve Glioma, Childhood, Optic Nerve, Malignant Astrocytoma
Synonyms : Cranial Nerve II Injuries, Optic Nerve Avulsion, Optic Nerve Contusion, Optic Nerve Transection, Second Cranial Nerve Injuries, Trauma, Second Cranial Nerve, Avulsion, Optic Nerve, Avulsions, Optic Nerve, Contusion, Optic Nerve, Contusions, Optic Nerve
Synonyms : Benign Optic Nerve Neoplasm, Benign Optic Nerve Sheath Neoplasms, Benign Optic Nerve Sheath Tumors, Benign Optic Nerve Tumor, Malignant Optic Nerve Neoplasm, Malignant Optic Nerve Sheath Neoplasms, Malignant Optic Nerve Sheath Tumors, Neoplasms, Optic Nerve
Synonyms : Anterior Optic Neuritis, Posterior Optic Neuritis, Anterior Optic Neuritides, Neuritides, Anterior Optic, Neuritides, Optic, Neuritides, Posterior Optic, Neuritides, Retrobulbar, Neuritis, Anterior Optic, Neuritis, Optic, Neuritis, Posterior Optic
Synonyms : Optic Neuropathy, Anterior Ischemic, Optic Neuropathy, Posterior Ischemic, Ischemia, Optic Nerve, Ischemias, Optic Nerve, Ischemic Optic Neuropathies, Nerve Ischemia, Optic, Nerve Ischemias, Optic, Neuropathies, Ischemic Optic, Neuropathy, Ischemic Optic
| optic nerve |
the cranial nerve that serves the retina
출처: wordnet.princeton.edu/perl/webwn
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| optic chiasma |
the crossing of the optic nerves from the two eyes at the base of the brain
출처: wordnet.princeton.edu/perl/webwn
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| optic tract |
optic nerve: the cranial nerve that serves the retina
출처: wordnet.princeton.edu/perl/webwn
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| optical glass |
clear homogeneous glass of known refractive index; used to make lenses
출처: wordnet.princeton.edu/perl/webwn
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| opticofacial winking reflex |
closure of the lids when an object is brought suddenly into the field of vision.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| optic | an optical phenomenon that results in a false or deceptive visual impression |
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| optic | an instrument designed to aid vision |
| optic | a lens that focuses the image in a camera |
| optic | (Light Amplification by Stimulated Emission of Radiation) optical device that produces an intense monochromatic beam of coherent light |
| optic | opacity to light |
| optic | a physical phenomenon related to or involving light |
| optic | optical device having a triangular shape and made of glass or quartz |
| optic | a pyrometer that uses the color of the light emitted by a hot object |
| optic | an astronomical telescope designed to collect and record light from cosmic sources |
| optic | in an optical manner |
| optic | a worker who makes glasses for remedying defects of vision |
| optic | the branch of physics that studies the physical properties of light |