| 单词 | crystalline lens |
| 例句 | When light enters a new transparent medium, like the crystalline lens of your eye or the glass lens of a microscope, it is bent either away or toward the line perpendicular to the boundary surface. College Physics for AP Courses 2015-08-12T00:00:00Z An anomalous state of refraction caused by the absence of the crystalline lens, as after operations for cataract. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z Possibly, in a greatly-prolonged decay of all the organs with age, all eyes tend to become cataractous from structural alteration of the crystalline lens. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z Later on he showed incontestably, by exact measurements, that it is the crystalline lens which changes its form during adjustment; but he was wrong in supposing the fibres of the lens to be muscular. Heroes of Science: Physicists 2012-01-17T03:00:17Z A′queously.—Aqueous humour, the watery fluid which fills the space between the cornea and the crystalline lens in the eye; Aqueous rocks, in geology, rocks composed of matter deposited by water. Chambers's Twentieth Century Dictionary (part 1 of 4: A-D) 2011-10-11T02:01:08.990Z The crystalline lens, on the other hand, may be dislocated, and thus cause image distortion. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z But I now understand the cause; the more distant the object is from the crystalline lens, the nearer to it, will the image be formed. Conversations on Natural Philosophy, in which the Elements of that Science are Familiarly Explained 2011-07-12T02:00:28.027Z Just behind the pupil is the crystalline lens, resembling a small, very strongly magnifying glass, convex on each side, though more so behind. The New Gresham Encyclopedia Volume 4, Part 3: Estremoz to Felspar 2011-04-14T02:00:59.373Z The crystalline lens was the only resource left whereby the accommodation could be effected. Heroes of Science: Physicists 2012-01-17T03:00:17Z The crystalline lens was remarkably soft, and scarcely of more consistency than the vitreous humour. Lachesis Lapponica A Tour in Lapland, Volume 1 2010-12-31T03:00:11.350Z The Crystalline Lens Cataract.—Intransparency of the crystalline lens is technically known as cataract. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z What can be said in respect to the form and structure of the crystalline lens? A Treatise on Physiology and Hygiene For Educational Institutions and General Readers Aq�ueous humour, the limpid watery fluid which fills the space between the cornea and the crystalline lens in the eye. The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli Orbits very small and eyes rudimentary, without crystalline lens. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" How far it will alter the received views upon the subject of changes in the strength of vision, which are now attributed to alterations in the distance of the crystalline lens, cannot be foretold. The Galaxy, April, 1877 Vol. XXIII.—April, 1877.—No. 4. An idiopathic uncomplicated cataract is also met with as a congenital defect due to faulty development of the crystalline lens. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z This, which has been called the function of accommodation, is one of the most admirable of all the powers of the eye, and is exercised by the crystalline lens. A Treatise on Physiology and Hygiene For Educational Institutions and General Readers The optic nerve appears to have retained its health long after the crystalline lens has parted with its transparency. The Dog The central border is free, and rests against the circumference of the crystalline lens. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) In cataract the crystalline lens becomes opaque and loses its transparency, the power of refraction is lost—the animal can not see. Special Report on Diseases of Cattle In some diseases, as diabetes, the altered general nutrition tells in the same way on the crystalline lens. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z A few drops of watery colorless fluid occupying the space between the cornea and crystalline lens. A Treatise on Physiology and Hygiene For Educational Institutions and General Readers The lens of the camera obscura transmits the figures to the prepared paper, on quite the same principle on which in vision the crystalline lens conveys them to the retina. Leading Articles on Various Subjects The posterior chamber is the narrow space, less than half a line in depth, bounded by the posterior surface of the iris and pupil, in front, and by the ciliary processes and crystalline lens, behind. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) Fourthly, Cataract, or opacity of the crystalline lens, is commonly observed in persons whose parents have been similarly affected, and often at an earlier age in the children than in the parents. The Variation of Animals and Plants Under Domestication, Volume II (of 2) An opacity had formed over the crystalline lens of the eye. Astounding Stories of Super-Science February 1930 A defect of the accommodation of the eye, caused by the hardening of the crystalline lens; the "far-sight" of adults and aged persons. A Treatise on Physiology and Hygiene For Educational Institutions and General Readers The lower cut illustrates the relation of the crystalline lens to sight. The Home Medical Library, Volume II (of VI) When the crystalline lens, or its investing membrane, is changed in structure, so as to prevent the rays of light passing to the retina, the affection is called a cataract. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) From this artery, a small branch goes through the middle of the vitreous humour, and giving off branches on every side, expands itself upon the capsule of the crystalline lens. Popular Lectures on Zoonomia Or The Laws of Animal Life, in Health and Disease When that is discharged in extracting the crystalline lens for cataract or otherwise, it will be restored again in a few hours, and the eye will continue to perform its function. Popular Education For the use of Parents and Teachers, and for Young Persons of Both Sexes The brilliancy of the eye is in part, at least, dependent upon the reflection of light from the front surface of the crystalline lens. A Treatise on Physiology and Hygiene For Educational Institutions and General Readers This is what is known as the crystalline lens, and the rays of light are bent in passing through it so as to be properly focused on the retina. The Home Medical Library, Volume II (of VI) The crystalline lens is of different degrees of convexity on its two sides. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) Cataracta is an opacity of the crystalline lens of the eye. Zoonomia, Vol. II Or, the Laws of Organic Life The eye is composed of distinct parts, such as the sclerotic, the cornea, the retina, the crystalline lens, etc. Creative Evolution From this we learn that one of the uses of the crystalline lens is to make the retinal image bright and sharply-defined, at the same time that it reduces its size. A Treatise on Physiology and Hygiene For Educational Institutions and General Readers This adjustment of the shape of the crystalline lens is called "accommodation"; it is effected by a small muscle in the eyeball. The Home Medical Library, Volume II (of VI) Both surfaces of the crystalline lens are oval, not spherical, and the refraction of the rays of light is mainly effected in this portion of the eye. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) His medical friends at first supposed that cataracts were formed in the crystalline lens, and anticipated a cure from the operation of couching. The Martyrs of Science, or, The lives of Galileo, Tycho Brahe, and Kepler He described the decussation of the optic nerves and the capsule of the crystalline lens, and gave the first clear description that has survived of the structure of the eye. The Legacy of Greece Essays By: Gilbert Murray, W. R. Inge, J. Burnet, Sir T. L. Heath, D'arcy W. Thompson, Charles Singer, R. W. Livingston, A. Toynbee, A. E. Zimmern, Percy Gardner, Sir Reginald Blomfield It acts as a substitute for the deficiency of the crystalline lens. A Treatise on Physiology and Hygiene For Educational Institutions and General Readers Take out the crystalline lens in the eye of a salamander and the edge of the iris, or colored part of the eye, will grow another lens. Preventable Diseases It is supposed that the muscular substance of the ciliary body and processes changes, by its contraction, the inclination of the crystalline lens. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) To provide for this, there is in the middle of the eyeball a firm, elastic, little globular body about the size and shape of a lemon-drop, called the crystalline lens. A Handbook of Health It seems as if the crystalline lens and the optic nerve were sufficient for the purpose of sight, with the cornea simply to protect them. Fables of Infidelity and Facts of Faith Being an Examination of the Evidences of Infidelity The alteration in the shape of the crystalline lens, which accommodates or adjusts the eye for near and remote vision. A Treatise on Physiology and Hygiene For Educational Institutions and General Readers On the 21st of July the operation of extracting the crystalline lens was performed on the left eye. The Mind of the Child, Part II The Development of the Intellect, International Education Series Edited By William T. Harris, Volume IX. The crystalline lens of the human eye, limited by the iris to a maximum opening about one-quarter of an inch in diameter, was the only collector of starlight available to the Greek and Arabian astronomers. The New Heavens "Sometimes we take off the film of a cataract from the eye; sometimes even we can take out the crystalline lens and substitute a heavy lens in glasses to be worn by the patient." The Sagebrusher A Story of the West Accordingly we find that the eye of a fish, in that part of it called the crystalline lens, is much rounder than the eye of terrestrial animals. A Candid Examination of Theism The Crystalline Lens.—Immediately back of the iris and touching it is a transparent, rounded body, called the crystalline lens. Physiology and Hygiene for Secondary Schools It has the following explanation: In early life, when we look at near objects, the crystalline lens automatically becomes thicker, more convex. The Science of Human Nature A Psychology for Beginners The crystalline lens enclosed in its capsule is situated immediately behind the pupil, in front of the vitreous body. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada The retina of the eye cannot be moved backward and forward, as the screen was, and the crystalline lens is permanently located directly back of the iris. General Science The various parts of the eye, but more particularly the crystalline lens, undergo modifications in form and structure. Scientific American Supplement, No. 620, November 19,1887 The crystalline lens, however, performs a special work in focusing which is of great importance. Physiology and Hygiene for Secondary Schools As we get old, the crystalline lens loses its power to change its adjustment for near objects, al though the eye may see at a distance as well as ever. The Science of Human Nature A Psychology for Beginners CATARACT.—This is an opacity of the crystalline lens or its capsule. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada The answer to these questions is that the crystalline lens changes shape according to need. General Science The crystalline lens of the eye exhibits the effect in a very striking manner. Six Lectures on Light Delivered In The United States In 1872-1873 While the greater portion of the eyeball is concerned in the focusing of light, the crystalline lens, operated by the ciliary muscle, serves as the special instrument of accommodation. Physiology and Hygiene for Secondary Schools They have a cornea, a crystalline lens, a retina, and so on, and she can see with them. Twenty-One Days in India; and, the Teapot Series The crystalline lens and retina may be treated similarly. Scientific American Supplement, No. 492, June 6, 1885 The eyeball of a farsighted person is very short, and the retina is too close to the crystalline lens. General Science Looked at from without, the crystalline lens at the same time is seen to gleam vividly. Six Lectures on Light Delivered In The United States In 1872-1873 Show how the iris, the crystalline lens, the retina, the ciliary muscle, and the cornea aid in seeing. Physiology and Hygiene for Secondary Schools The patient had a tremulous iris in his right eye and had clearly suffered from dislocation of the crystalline lens. The Mystery of 31 New Inn Wordsworth presented to the Medical Society of London six members of one family, all of whom had congenital displacement of the crystalline lens outward and upward. Anomalies and Curiosities of Medicine The eyeball of a nearsighted person is very wide, and the retina is too far away from the crystalline lens. General Science The media of the eye are the crystalline lens, vitreous and aqueous humors. Common Diseases of Farm Animals What change occurs in the shape of the crystalline lens when we look from distant to near objects? Physiology and Hygiene for Secondary Schools The portion behind the iris forms the posterior chamber, and contains the crystalline lens and a transparent, jelly-like fluid, the vitreous humor. A Practical Physiology Buller describes a case of lightning-stroke in which the external ocular muscles, the crystalline lens, and the optic nerve were involved. Anomalies and Curiosities of Medicine Cataract is a disease in which there is an opacity of the crystalline lens or its capsules, which obscures the vision. Hygienic Physiology : with Special Reference to the Use of Alcoholic Drinks and Narcotics The crystalline lens is a transparent, biconvex body sustained by the ciliary processes. Common Diseases of Farm Animals Chambers and "Humors" of the Eyeball.—The crystalline lens together with the suspensory ligament and the ciliary processes form a partition across the eyeball. Physiology and Hygiene for Secondary Schools All the rays that enter the eye must also pass through the crystalline lens, which brings them to a focus, as any ordinary lens would do. A Practical Physiology Trioen mentions a curious case of expulsion of the crystalline lens from the eye in ophthalmia, through the formation of a corneal fissure. Anomalies and Curiosities of Medicine The crystalline lens converges the rays of light which enter the eye, and brings them to a focus on the retina. Hygienic Physiology : with Special Reference to the Use of Alcoholic Drinks and Narcotics The hollow of the sac is afterwards filled with the cells of its thick walls, and thus we get the solid crystalline lens. The Evolution of Man — Volume 2 Of chief importance are the crystalline lens and the cornea. Physiology and Hygiene for Secondary Schools By the action of the crystalline lens, aided by the refractive media, the rays of light that are parallel when they fall upon the normal eye are brought to a focus on the retina. A Practical Physiology Last of all, he comes to the crystalline lens. Darwiniana; Essays and Reviews Pertaining to Darwinism The crystalline lens, a, brings the rays of light to a focus on the retina. Hygienic Physiology : with Special Reference to the Use of Alcoholic Drinks and Narcotics And what makes all this so refreshing is that his other great quality is an intensely critical spirit, which stares closely and intently at work, as through a crystalline lens. Escape, and Other Essays In the process of accommodation, changes occur in the shape of the crystalline lens, as follows: 1. Physiology and Hygiene for Secondary Schools This defect is caused by an increase in the density of the crystalline lens, and an accompanying diminution in the ability to change its form. A Practical Physiology Thus enlightened, our skeptic turns to his crystalline lens to see if he can discover the work of a Dollond in this. Darwiniana; Essays and Reviews Pertaining to Darwinism How is the crystalline lens kept in place? Hygienic Physiology : with Special Reference to the Use of Alcoholic Drinks and Narcotics Fourthly, CATARACT, or opacity of the crystalline lens, is commonly observed in persons whose parents have been similarly affected, and often at an earlier age in the children than in the parents. The Variation of Animals and Plants under Domestication — Volume 1 It is ascertained, by exact experiment with the phacueidoscope, that accommodation depends on change of form of the crystalline lens. Medical Essays, 1842-1882 The alteration in the shape of the crystalline lens, which accommodates, or adjusts, the eye for near or remote vision. A Practical Physiology The crystalline lens in the higher cuttle-fish consists of two parts, placed one behind the other like two lenses, both having a very different structure and disposition to what occurs in the vertebrata. The Origin of Species by means of Natural Selection, 6th Edition It is to a certain extent the crystalline lens through which all appearances pass before reaching the understanding. On War — Volume 1 The eyes, which were mere pits in the skin, lined with pigment cells, in the early worm, now have a crystalline lens to concentrate the light and define objects on the nerve. The Story of Evolution The watery fluid occupying the space between the cornea and crystalline lens of the eye. A Practical Physiology A defect of the accommodation of the eye, caused by the hardening of the crystalline lens; the "far sight" of adults and aged persons. A Practical Physiology The thin, muscular ring which lies between the cornea and crystalline lens, giving the eye its special color. A Practical Physiology |
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