Practical hydropathy : including plans of baths and remarks on diet, clothing, and habits of life / by John Smedley.

Smedley, John.

Date:: 1861

Credit: Practical hydropathy : including plans of baths and remarks on diet, clothing, and habits of life / by John Smedley. Source: Wellcome Collection.

493/530 (page 485)

$VISION. 4g5 «2? tocTe\frC0fbocHef Thf^ US t0 FT™ the magllitude> ^iou enter into\ndion lrW tt~ fl gan/ w£lC> C?mI)0se the apparatus o f called The Toper fes of ffi^H 1 1Xcitan?' 01 stim^> evf ^ ™p^Hi±^the better t0-e^ the action of light in the Ration of Kfer&KJ ^nHenClnS P,laced ^ the pro- whfch falls upon the cX cVrl ™•1 ff eye • -We 5*™* only the light Tvhite of the eye, the evehds 3 for that which falls on the by those parts dk^SiftW11111^ nothing: rt is reflected receive the light on itswholeexrf fn, feCOl°^ ^ c?1?lea itseIf does n°t of the eyelids. Thecornea havi™, fi itis generally covered in part by the border reaches it, part of TT^SdwW&T^ s?a?>™ soon as the light the eye. liesamereflL ed ShtformTS to form the brilliancy of La this case the cornea acts as a S^S^Se^^^^ W the influence it should have unon thp]i~hflti lie torm of the cornea indicates its thickness, it only caS the^ravs to fill1Ch ??ters the eye: on account of pencil; in other wordsTiSes tanOT a V^8, ^e ^ of tne mto the anterior chamber *Evs in wfr 7 ^ hght wUch Penetrates rare to a denser medium- comeXtfv IIIersm\the cornea> Pass from a more pendicular towards thepoinio7Tf t0+ ^nver^ fr0m the Per' chamber, they passed out a-ait! th^ 1 i i r' 0n entenng mto the anterior dicnlar a^ theyVd com^r4f^foi^L° wL^?^6 f mwh from th* ^rpen- divergence • but as they enter mr? the therefore>. a™e their fomer refractive than air, therATle^^f^^™01*' ^ Ka medium ™™ diverge less than if they had passed back t^^^' ^consequently, nutted to the anterior chamberon?thatwhi^ °f 5 the ]i%ht tra^! vision: all. that which falls upon he rtfiltteSTlu6 PT* Can, bf of use to and exhibits the colour of thes iris It, M! ■' ft1™ though the cornea, light undergoes no new modScation asVnr3g f* ^teTl0T <&a*ber the fthe aqueous humour). ]?tt rn trkZt Keds ^ys^ th? same medium the most important modification ffif?the crystaUme that light undergoes to that of a LMheTs?Sf whTch lotldZ6 of this ^dy of light upon a certain pointofthe S Bat ™ tt^ ^ TP an? ™™ from bemg like a lens, we merely mentioithis onhi™ ]S V(Ffar caved, to remark that it merits a fresh inw?P^l ' ™ch ls, generally re- yhich can be said on the subject £ that the SlSS Positive mtenarty of the light which isdirected toward 7h>T ?+ °Ught ,to mcrease the energy proportionate to KaffiSffiS111 o{^hc eye with an that the light which passes near theSfe i^.mav be adcH f reflected m a different manner from that wl,;^ ™. crystal me is probably that, therefore, the contraction and dShSS? ?af,ses %ough the centre; and rnflnencc upon the mechanfsm o S^l£^S^^^» ™ Philosophers. The whole of the fe^Mff the .attention of the crystalline does not penetrate mto thSViSM the anterior surface of One part of this reflected light SttSL^SSSi'S ; * 18 ^ rcflccted- and contributes to form the brilliancy of the Se^lWfi and the comea, nor_ surface of the iris, and is absorhed to thlrfJKfef T8 US°? tbc P^te- ssstt mas-« Ss?s ^5$