Deafness and blindness

“ I see the blind man's eyes strain for the light, as he fearfully tries to walk his old rounds, [97] until the unchanging blank that everywhere spreads before him stamps the reality of the dark upon his consciousness.
My temporary loss of smell proved to me, too, that the absence of a sense need not dull the mental faculties and does not distort one's view of the world, and so I reason that blindness and deafness need not pervert the inner order of the intellect. ”

“ The optic nerve is the sole organ of vision, and when wholly destroyed, total blindness ensues. The sense of hearing comes through the auditory nerves; when these are destroyed or wanting we have no means of acquiring a knowledge of sounds, and perfect deafness is the consequence: so of every other organ by which we become acquainted with external objects. Therefore when we are told, upon no matter what authority, that any individual can see without eyes, or has the faculty of any other sense without its appropriate organ, we are bound to consider all such testimony false. ”

“ This observation may throw some light on the medical treatment of deaf people; as it may be learnt from their dreams whether the auditory nerve be paralytic, or their deafness be owing to some defect of the external organ. ”

“ In this case only, he supposes, that perforating the drum may prove a remedy for deafness, as depressing the chrystalline humour of the eye (vulgarly call’d couching a cataract) is daily found to be a remedy for blindness; and yet that operation has been as indecently and ignorantly ridicul’d as the experiment of Mr. ”

“ In the outlook there is, on the whole, promise, both in respect to the treatment of deafness itself and of the diseases that lead to deafness, though it cannot be said in any sense that any large or general relief is at present in sight. ”

“ That difficulty has its ground in the unwillingness of parents to admit that their children -were born deaf. Their deafness is often attributed to some infantile disease, though the defect is congenital. On the other hand, when they have lost the sense of hearing at an early age, they may be included among the congenitally deaf. But all institutions for the deaf and dumb contain instances which illustrate scientific investigations, and establish the position that such causes as those now alluded to tend to induce and perpetuate the disease of deafness. ”

“ We may perhaps best approach the problem of deafness as an increasing or decreasing phenomenon in the population, if we think of the deaf as composed of two great classes: those adventitiously deaf, that is, those who have lost their hearing by some disease or accident occurring after birth, and those congenitally deaf, that is, those who have never had hearing. ”

“ In the open air the hearing is better than in a confined situation; in a noisy, than in a quiet society; in a coach when it is in motion, than when it is still. A pulsation is often felt in the ear; a noise resembling sometimes the roaring of the sea, and at others the ringing of distant bells is heard. This deafness generally begins with a diminished secretion of the wax of the ear, which the patient attributes to cold. ”

“ The causes assigned for congenital deafness are consanguineous marriages, hereditary transmission, weak constitutions of parents, scrofula, climate, and the ill-health of the mother at a certain period of life. There is necessarily difficulty in ascertaining the real cause of deaf ness. ”

“ These are certainly outside our province, which is the deaf. The “dumbness” in these four classes is aphasia, due to some brain defect.
Of those in the list, classes 7, 8, 9 and 10 are (we are strongly of opinion) incorrectly described, being, as we think, composed of those who are simply feeble-minded as well as, in classes 7 and 8, blind. Their so-called “deafness” is merely inability of the brain to notice what the ear does actually hear and to govern the vocal organs to produce articulate sound. ”

“ Many are the children, blessed with perfect hearing and consequent speech for the first two, three, or four years of their lives, who, in consequence of improper or no attention to their ears during an attack of measles, scarlet fever, or diphtheria, have totally lost all sense of hearing; and their ability to talk has then gradually diminished and disappeared also. Our deaf and dumb asylums are filled with just such cases of "preventable deafness." ”

“ Of that form of deafness in which neither consanguineous marriages nor antecedent deafness is involved, we are at present, as we have noted, able to say little definitely. In most cases we may be convinced that there exists in the parent some peculiar state of morbidity or other affection, latent or manifest, perhaps to some extent of hereditary influence, which has an effect on the organs of hearing of the offspring. A certain proportion is quite possibly due to recognizable defects both of physical and mental character. ”

“ The case of the deaf is unquestionably the worst of the two, when the deficiency is from birth. The subsequent loss of either sense is quite a different matter. Then, blindness is the severest privation of the two, from its compulsory idleness, and total exclusion from the objects of the lost sense, while the deaf can always be busy in mind and hands, and retain the most important part of the world of sound in written and printed speech. ”

“ If the hearing is properly tested just as soon as the ringing in the ears has become more or less constant, some degree of deafness will be detected. As the case progresses, even before all the so-called superfluous hearing has been destroyed, the patient will realize that he is becoming deaf. For this condition there is nothing to be done by the patient himself. ”

“ Again, in middle-ear deafness, hearing may be better in a noisy place, and be improved by inflation of the tympanum; while in labyrinthine deafness, hearing may be better in a quiet room, and be rendered worse by inflation. ”

“ Of the classified cases of deafness, according to the census, 56.3 per cent are due to diseases affecting the middle ear, and 42.7 per cent to diseases affecting the internal. Of diseases of the middle ear, 72 per cent are of suppurative character, often with inflammation or abscess, and 28 per cent non-suppurative, or rather catarrhal in character. Of diseases of the internal ear, 89 per cent are affections of the nerve, and 10 per cent of the labyrinth. It is to be noted that when the affection is of the internal ear, the result is usually total deafness. ”

“ Children thus affected hear only with difficulty and by straining certain small muscles of the ear, which soon become fatigued, and the child becomes listless and inattentive. I have seen numerous cases in which children have been severely punished for inattention, when this was due to defective hearing. Watchfulness and early attention in these cases will frequently prevent the more serious forms of deafness. ”

“ A common form of deafness is the result of hardening of the connections between the ear bones, so that the chain no longer follows well the vibrations of the drum. This usually begins to come on during the twenties or thirties, and causes almost complete deafness by the age of fifty. ”

“ That a slight deafness, which does not prevent a person from hearing when he is expecting to be spoken to, will make him very dull to what he is not expecting. 3. That there is a kind of deafness in which a person can hear pretty well while listening, but is really very hard of hearing when not listening.
Avoid Direct Draughts in the Ear.—There are some exposures especially to be guarded against. One is sitting or driving with the ear exposed to a side wind. Deafness has also been known to come from letting rain or sleet drive into the ear. ”

“ I had secretly arrived at the conclusion that my deafness was increasing, and that my friends knew it and were concealing it from me. Determined to put my suspicions to the test, I took long solitary walks in the neighborhood of my country home, and tried to hear the new sounds about me. ”

“ The most common disorder to which these organs are liable, is Deafness. Having already treated of that malady, we cannot avoid animadverting on the impropriety of employing the common ear-trumpets, which, though they may afford temporary aid, ultimately destroy that useful sense. ”

“ The vital statistics show that consanguineous marriages are a large factor in deaf-muteism; about ten per cent., it is estimated, of the deaf-mutes are the offspring of parents related by blood. Ancestral defects are not always perpetuated in kind; they may descend in physical deformity, in deafness, in imbecility. Deafness is more apt to descend in collateral branches than in a straight line. ”

“ In general, in respect to the influences of heredity upon deafness, the main determinants seem to be found in the existence in the parties, whether hearing or deaf, of deaf relatives, and, to a less extent, in the existence in parties who are deaf of congenital deafness. ”

“ The organ of hearing is injured at its peripheral extremity, or else the acusticus in its course; then occurs difficulty of hearing or deafness. What is spoken is not correctly heard or not heard at all: the utterance is correct only in case the lesion happened late. If it is [Page 37] inborn, then this lack of speech, alalia, is called deaf-mutism, although the so-called deaf and dumb are not in reality dumb, but only deaf. If words spoken are incorrectly heard on account of acquired defects of the peripheral ear, the patient mis-hears, and the abnormal condition is called paracusis. ”

“ Stroud Street, Dover, the first application of which gives immediate relief, restoring the hearing in the most confirmed stages of deafness, whether from old age, nervousness, or any predisposing cause, to which children and adults are subject, and from which deafness follows the heavy affliction of noises in the head and ears, immediately removed by its use. ”

“ Children should never be blamed for being inattentive, until it has been found out whether they are not a little deaf. This is easily done by placing them at a few yards' distance, and trying whether they can understand what is said to them in a rather low tone of voice. Each ear should be tried, while the other is stopped by the finger. Three things should be remembered here: 1. That slight degrees of deafness, often lasting only for a time, are very common among children, especially during or after colds. ”

“ Of those born deaf, speech alone or in combination with other methods is used by 18.2 per cent; of those becoming deaf after birth and under five, by 27.4 per cent; of those becoming deaf after five and under twenty, by 75.3 per cent; and of those becoming deaf after twenty, by 97.7 per cent.
FOOTNOTES:
[1] There are no sharply dividing lines between the different degrees of deafness, but it is only those described that really constitute a special class. Persons whose hearing is such as to be of use even in some slight degree are rather to be distinguished as "hard of hearing." ”

“ It should never be assumed that deafness is incurable. Stupidity, inattention, and slowness to grasp a situation accompany difficulty of hearing and should cause the teacher to examine the ears. No ear trouble is negligible. ”

“ The marriage of deaf people is inadvisable where there has been deafness in the family in former generations, but the same warning applies to all the other members of that family, for the hearing members are as likely to transmit the defect of which deafness is a symptom as the deaf members are. ”

“ In the latter case we are called upon to examine some of the great problems involved in the study of heredity, especially in respect to the extent that the offspring is affected by defects or abnormalities of the parent, and to see what, if any, means are at hand to alter conditions that bring about this form of deafness. We shall first discuss the causes of adventitious deafness, together [17] with the possibilities of its prevention and the likelihood of its diminution, and then consider the questions involved in congenital deafness. ”

“ Another condition to which I would call your attention is the incipient development of deafness in children. Where the capacity of hearing is quickly lowered from the normal to fifty per cent, it is so striking that the patient is much distressed and even confused. But when this change takes place insidiously from day to day, it is frequently not observed by either the patient or those around him until it has greatly advanced. ”

“ In all cases of congenital deafness it will be found that there exists some disorganization of the organ of hearing itself, some obstruc tion in the internal ear or compression of the auditory nerve, whereby the vibrations of the ear are prevented from pro ducing the required effect upon the internal parts of the ear, or from being communicated to the brain. ”

“ Those born deaf are precisely the ones that show plainly how necessary hearing is for the acquirement of perfectly articulate speech. One who is deaf from birth does not even learn to speak half a dozen sounds correctly without assistance, and the loss of speech that regularly follows deafness coming on in children who have already learned to speak, shows how inseparably the learning and the development of perfect articulation are bound up with the hearing. Even the deafness that comes on in maturer years injures essentially the agreeable tone, often also the intelligibility, of the utterance. ”

“ He stated that it is a very common cause of deafness and can seldom be cured; that the bringing of the uneven pressure on the Eustachian tube or other parts had broken away the secretion which had cemented these small bones together and permitted the ear-drum to vibrate as it should, and probably that was the only way in which she could have been helped. I am publishing this incident in the hope that it may lead to the construction of scientific apparatus for the cure of deafness in cases where the deafness is caused by trouble similar to that of the professor's wife. ”