3\(aturaU Hifiory: 
Caufe they need Contra&ing • But being Contracted, are more Rrong, 
than the Vifuall Spirits of Ordinary Eyes are - As when we fee thorowa 
Lettell, the Sight is the Stronger: Andfoisit, when you gather the Eye- 
lids fomewhat clofe: And it is commonly feenein thofe rhat are Pore- 
blinde, that they doe much gather the Eye-lids together. But old Men, 
when they would fee to Reade, put the Paper fomewhat afarre off. The 
Caufe is , for that Old Mens Spirits Vifu&ll , contrary to thofe of Pore-blinde 
Men, vnite not, but when the obieCt is at fome good diRanee, from 
their Eyes. 
Men fee better, when their Eyes are ouer-againft the Sunne, dr a Can¬ 
dle, if they put their Hand a little before their Eye. The Reafon is, for that 
the Glaring of the Sunne, or the Candle doth weaken the Eye • whereas the 
Light Circumfufed is enough for the Perception. For we fee, that an Ouer- 
Ught maketh the Eyes Dazell • Infomuchas Perpetuall Looking agai'nR 
the Sunne, would Cauf eBlindneJj'e. Againe, if Men come out of a Great 
Light, into a Darke Room • And contrariwife, if they come out of a 
Darke Roome, into a Light Roome, they feemeto haue a Mifi before their 
Eyes, and fee worfe than they fhall doe, after they haue Rayed a little 
while, either in the Light, or in the Darke. TheCa«/Hs, for that the Spi¬ 
rits Vifuall, are vpon a Sudden Change difturbed, and put out of Or¬ 
der; And till they be recolleded, doe hot perforrhe their Fuhdion well. 
For when they are much Dilated by Light , they cannot contrad Ridden- 
iy; And when they are much Contracted by Darkneffe, they cannot Dilate 
fuddenly. And Excefle of both thefe (that is, of the Dilatation , and 
Contract ion of the Spirits Vifuallf) if it be long, DeRroyeth the Eye. For 
as long Looking againR the Sun, or Fire, hurteth the Eye , by Dilatation • 
So Curious Painting in Small Volumes, and Reading of Small Letters, doe 
hurt the Eye by Contraction. 
It hath beene obferued, that in Anger, the Eyes wax Red- And iii 
Bluffring, not the Eyes , but the Eares, and the Parts behinde them. The 
Caufe is, for that in Anger, the Spirits afccndandwax Hager; Which is 
moR eafily feene in the Eyes, becaufe they are Tranflucide; Though 
withall it maketh both the Cheekes , and the Gills Red ; But in Bl«fbin», it 
is true, the Spirits afeend likewife to Succour, both the Eyes and the* 
Face, which are the Parts that labour: But then they are repulfed by 
the Eyes, for that the Eyes, in Shame doeputbacke the Spirits that af' 
eend to them, as vnwillingtolooke abroad: For no Man, in that Pafii* 
on, doth looke Rrongly, but Deiededly 5 And that Repulfion from the 
Eyes , Diuertcththe Spirits and Heat more to the Eares, and the Parts by 
them. 
The ObieCts of the Sight, may caufe a great Pleafure and Delight in 
the Spirits Joutno P aine,oxgto.at Offence - 3 Except it beby Memory gas hath 
beene faid. The Glimfesand Beames of Diamonds that Rrike the Eye ; In¬ 
dian Feathers, that haue glorious Colours; The Camming into a Fairer 
Garden ; The Camming into a FaireRoome richly furnifhed ; A Beautiful! 
Perfon, And the like; doe delight and exhilarate the Spirits much. The 
_ _____ Reafohi 
