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O//h.. AMDLYOPlA, or O bfcuriry of Sighl.
TH E .mblyopi. i. ao obCcurily of fighl••od is four.
fold: ",yupia, or /hnrt·fightl'dneCs; prdhytOpia, or fce·
ing ooly at too great a ; nyl\.dopia, or fecing
ooly in lhe nir,lu; amauroris . -o( which befare.
Myopia procceds from the tOO great convexity of the
c9rne",I or crytl.dllne hornour, or'frorn the eyes bClOg lar–
eer (han COOlman, as Wc ic:aro from optics. This is beil
.tlilled by gl.rre•.
Prdbytopia procceds from the contr;¡ry caufes, and
rcccivcs affi!hncc from gla!I~s of a convex formo
N yéblopia is • lwo(old malady, iD " hich lhe como
pl~iOts are contrary 10 caeh othcr. In the: 6rfi fpecies,
lhe fighl is bdl in ,he nighl. and io obCcure place.; bUl
in • clear lighl lhe figh l faiJs, and lbey caD bardly fee
.oy lhing . . In lhe olher fort, which is improperly
ealled • oy8alopi., lhey Cee nOlhiog a< .JI, excepl in a
elc,r and brighl lighl. This iOlirmilY ariC.. from • na·
.urally b.d formatioo of lhe cye, and lS lherefore incu rable.
The prc(pYlopi. m.y likewjfe be atlilled by cephalic and
Orengthcoing medicines, by watery and vincus ¡ofuGoDs,
IDd comfoning eye-waters.
O/ a STIlABISMUS. or Squinling.
A STO"" ..lV., commonly calJcd fquioliog, is an
unequal contraflion of tbe mu{cles of the eye, eitber
(rom. fpa fm, ao epilepfy, or . palfl', whereby lhe axis
of lhc pupiJ is drawn lowards lhe nof. , lemples, f6re·
head, or ch«k. ; fo lhat Ih. P.erron cannOl behold .n
obje8 direélly. Inf.n.. readily eootra8 .his dinemper,
fometimcs for want of care in the nurfes, wbo plaee the
crldles iD a wroog pofilion, lIIilb regard 10 lhe light.
Choldrrn likewife, wbile grO'\'ing up, fomelimes faJl in10
lhis diCorder, eilh., from ilJ culloms contr.éled io play.
ing. or by looking on olhers who are affe8ed \Vilh il.
Thi. dirorder " Tery dillieull lO cure; lhere(ore lhe
ulmOn care /hould be taken 10 preyenl il, .nd lbe cradle
/hould be (o ploced. as nOI '0 occafion lbe child lO look
a·,ny. iEgineta ..eontrived a rna1k, and fa adapted it tO
lhe face, lha< no\bing could be fceo excepl throuth 11110
hol.. nnigb l forward ; .nd (or lhe purpofe what
\l/e c:a1J gogglers are uCed.
O/ Ihe ALBVGO, Dr SpOl in/he El'e.
AH Albugo, or leucom., is • whiti/h fpOl of Ihe ·
puent cornea: the bro20der and thicker il ¡s, (he more
il obfcures the figln j when it is fupe rficiíll, it appeiU $ the
whHcr : l nd, when il is deeply'rooted, it lends tObl.4ck·
nerl. and is {carce c:ur"blc. 'T hílt whi, h is in rcality a
cic.auix. or {¡ r, lef, aJter a wound or ulcer in ,he eye.
is Hry dillicull 10 be di!lip...d; lh.. which r Jlo",s an
iDRammation of the eye ofH:n goe.! away of liS OVO" ae·
cord.
It may be (rom a cicatr:x . becllure this is
or a Ihining white and WilhC'lUl p"in; \\hc:,e.u Ihe ...Ibu~o
looks lile Choll~, is aHended wirh a Olgh t fl.H",ion. and
fome degrce of <ln inOammation wilh p..iu. ] l 15 genera.],
Jy lhe forcrunner of an ulct!r.
The lOu:nllons of cure- are :mfwcred hv tmollients,
..rulv OlS, and d'[culients, which Dlull be ul~d WiUI gr~a,
...
e J N E.
caution. T o takc away a cicatrix, the Iharpen topic,...
nay. eath~r(tics, are fomelimts 10 be ufed, with a very
prudont : bUl, firn of .JI, mild lhings may be tried •
and, ir they faiJ, \V~ m::ty procecd 10 firoDge r. '
O/ a SVGlLLAT'O., or BloodnlOl Eye.
A Sv G' LeAT ' ON firfl 'ppe"s of a reddin, colour, and
. ftcr\Vards Itvid or black. It is c. uCed by a flroke or (aJl ,
or violcnt vomiting, whcreby the .blood is extr"vafaled
in lhe coats o( lh< eye. I( lhe cOrnea is .ff . very
much, aJl obje8s appear of • r<ddi/h colour; for fome
veios run 10 the corneíl, in [he pan towa rds. the iris, or
lhe blood m'l'be poured OUl inlo il from lhe neighhourin~
verrds.
I( lhe diforder is ere.., lhere wiJI be occafion for bleed·
ing .nd purging, for lhe grumated blood iD lhe fugillalion
is io be refolved and difcurred, whicb m.y be done by
dircutients, fuch as juice of fennel, with balram of Peru,
juiee of celand}ne, .limpIe honey-water, mixed with olher
eye·waters.
If from lhi. or any olher caufe lhere /hould h.ppen 10
be an ulcel of the eye. Demours reeommends eDarfe fugar
as agood ingredient foc dete. ging thof~ of the cornea, in
which .nringeolS are hurlful; bu. i, mun be mixed Wilh
coUyria \Vhen lhe aqueous humour of lhe eye i. eva–
cuated at a wound or ulcer <if the cornea. he expofes the
patieO( tO the light, (rom time to time, till the cornea is
.gain " ired by lhe aqueous bumour; for lhe lighl occa·
fions a motion in the iris, which lIlay prevem ilS adheúoIl
to lhe cornea.
O/ /he EPlPH OOA, or L ippilude of /h. Eyes.
A N epiphora is a de8uxioo of a Cah /harp bumour
upon the eyes. aHended with itching. pain, and rednefs jo.
as olfo • dimnefs of fighl. It is bUl Oighl wheo Ihere io.
DO defe8 in lhe bulb of lhe eye, \Vhcn lbe eye.lids fwell
and look red, when Ihe matter of lhe Buxion is thiek aDd
fomettmes glue, the t'ye~lids together in tbe nigbt, con·
linuing in Ihis Chte for fome time.
C luldren >re o(ten afR,8ed \Vllh lhi. difeafe, particularly
lhofe who h. ve had a fCdld· head improperly cured ;. or wbo
have fwellings in the glands of the oeck or about (he ean,
and .heo it cannot be cured until thefe tumour! are dif~
curred. It Comel'm.s l,k<wiCe fucceeds lhe fmaJl ·pox .od
meaOes.
T he Ce.. of lhi. difeafe is in lhe glands of lhe eye~
efperi.lly in lhoC. caUed lhe lachrl'mol glands.
T his dlfeafe may be certainly cured io lhe beginning..
by a plenl,flll drinkiog lhe m(ufioo of lhe leaves of v••
TODica, in ,he manner of tea, for fome time. When it i5
inveterate, rhe paticnt mufi be very regular in bis diet,
and mun avoid rvery thing (ah, Olar'P. acid . wine, (!rong.
bcer, ~r.d drams. B is COOlmon drink may be a decoe–
tion of hartfhorn and re.nnel, {eeds. ufiog warm p¿diJu"ia
at night gOlng tO bed.
Extcrn.tlly a erain of vitriol may be mixed with un–
fahcu bUller, lO which a fm. 1I portion of fugar of lead
OlAy be zcldcd and pu t ¡DtO (be greater corner o( the eye.
T his is • mol! uf.ful medicine. When u.. Jippilude i,
of lite dry kind . • 11 .cid .pplicalions mun be ,,·oided•
.nd lbe eye. mun be covered Wilb • pouhice o( while
bread.