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A01822 Two treatises concerning the preseruation of eie-sight. The first written by Doctor Baily sometimes of Oxford: the other collected out of those two famous phisicions Fernelius and Riolanus; Briefe treatise touching the preservation of the eie sight Baley, Walter, 1529-1592.; Fernel, Jean, 1497-1558. aut; Riolan, Jean, 1538-1605. aut 1616 (1616) STC 1196; ESTC S114909 24,561 70

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the Eyes are of a delicate and soft nature so ar they by the most light occasion offended as by smoak by dust and the Sunne beames so the north winde and vapours rising from minerals doe hurt the eyes But this peculiar property the eyes haue that they congeale not because they are of a fiery property and doe consist of an airy fatnes The eyes are subiect to euery kinde of disease Simeler Organical and commune as the similer parts doe labour with euery distemprature with an hot distemprature as often as they are offended with smoake or dust which offence proceeding from an outward cause is properly called Taraxis rednes of the eyes is more like vnto Phlogosis then Phlegmon because they arred without tumor A cold distemprature doth dull the sight A moyst doth dilate the pupill A dry distemprature doth either shrinke vp the whole eye or the pupill thereof is dryed or extenuated as it hapneth in extreame old age or by the immoderate vse of venerie From thence Pthisis and an Atrophia hapneth of the eye I call that Pthisis which is an extenuation of the pupill or apple and becometh more angustior and streyter and more obscure but that is an Atrophia when the whole eye is consumed for want of nourishment And as the Instrument doth suffer diseases of number of magnitude of situation and conformation I say conformation in the figure Meatus and Asperitie for it is a disease in magnitude as often as the eyes are more great and more standing forth then they should for the lesser eyes are best because the visible vertue being coacted and drawne togither is greater then when it is dispersed and is least subiect to outward iniuries from whence it doth happen that those which by nature haue small balls or apples of the eye haue their sight most sharpe I meane not those which haue it so by accident as if they be extenuated by immoderate venerie for then thinges seeme to be greater then they are to this may be referred Enchanthis and Rhinas for they are the contrary of the same kinde Encanthis is an excrescence of the same flesh which is in the greater Cantho but Rhinas is when the same caruncle being eroded and eaten doth appeare as it were hanging forth To diseases of number doe appertaine Suffusio which is commonly called the Cataracte which is an humor concreate betweene the Cornea and the Vuea in like manner the web called Pterigium and Onix or Vngula and Hipopion The web is a neruose membrane which according to diuers men doth proceede from the great corner vnto the apple and sometimes at length doth couer the whole eye Onyx or Vnguis is a Cicatrix from some vlcer which is referred to the likenes of a nayle Hypopion is a certaine Pus collected vnder the Cornea which doth succeed a suppurated inflammation Chemosi Hyposphagmati bloudy and suggillat eyes such as are when some veine is opened broken or gnawne the bloud waxeth blewe and liued To diseases of Site or situation doth appertaine Ecpiesmos which is when the whole ball hangeth forth which hapneth by the Muscles relaxed which muscles do obuolue the opticke nerue which disease may be called Prolapsus oculi although Paulus doth cal it Proptosin when the Cornea being eroded or eaten the Vuea doth hang forth of which Proptoseos there are diuers names for first when the vuea doth hang forth because it appeareth like vnto the head of a Flie it is called Myocephalos but when it doth increase more and doth represent Acinum vuae it is called Staphiloma when it doth more increase and the eye is starke blinde and hath the likenes of the head of a nayle it is called Clauus but either affect is Morbus in situ but the first is of the whole eye the latter of one onely part that is of the vuea Diseases of conformation are when the naturall figure of the eye is peruerted as in Strabismo or conuulsion Midriasei or dilatation of the ball also diseases in Via as a sodaine obstruction of the Opticke nerue which is called Hamarosis The Sicke seeth nothing at all when notwithstanding no cause appeareth in the eye the tunicles of the eyes ought to be light terse and fayre are sometimes exasperated with an inward and outward cause as with smoake and dust The eyes do suffer most often common diseases as vlcers and tumors against nature first phlegmon which is called Opthalmia that is knowne by tumor inflamation rednes and paine The vlcers do manifest themselues by itch by paine and Saines but not also the Adn●ta but also the Cornea is sometimes vlcered and whether it bee vlcered wee may easily know by this signe There doth appeare a white spot in the black of the eye with the signes aforesaid and when the Coniunctiua is vlcered there doth appeare as it were a red spot in the white of the eye But first I will set downe the manner of curing of those diseases and then I will speak of the Symptoms The precept of Plato in Charmide is familiar with Galen Euen as it is in vaine to cure the diseases of the head without consideration bee first had of the whole so rashly to prescribe remedies to the eyes except we first consider of the head where is the originall both of the eyes and the fountaine of all diseases which come by defluxion Therefore first of all the body is to bee purged with pillulis lucis maioribus in a cold cause and in an hot cause with pil lucis minoribus or with Sena and Agarick which shall bee boyled in a decoction or with the distilled waters of Fenel and Eyebright with which vehicles the purgatiue vertue is carried to the eyes and consider that the Agarik doth especially profit the braine and the Senna the eyes The opening of a veine in hot diseases is profitable but not in cold yet the common people do hold an opinion that bloud-letting doth weaken the sight for it draweth the animall spirits and so doth weaken their force because the vapour of bloud or the naturall spirit is the matter of the vitall spirit as heere of the animall for the eyes ought to be fiery and full of Animall Spirit Masticatoria without doubt doe profit to the deriuation of the humor from the braine but your errhina are hurtfull especially the stronger sort because they draw to the part affected for there is great affininity of the nostrils with the eyes there is also a manifest foramen from the eye into the nostrill whose opercle or couer is a litle lacrimall flesh But some man may say Aerius doth prescribe errhina I answer those are the lighter sort neither is the disease as yet confirmed but now beeing confirmed and the humor fixed and not flowing Cupping glasses adplied to the shoulders doth pluck back the fluxe from the eyes euen as a Seton and Cautier in Inio Iohn de Vigo doth apply behind the eares bloudsuckers and Vesicatorium as Vesicatorium