Now, observe in the eye, that forward part is the watch glass; the cornea, made of a substance at once hard, transparent and elastic -- which man has never been able to imitate -- set into the sclerotica, that white, muscular coat which constitutes the white of your eye, acts as a frame for the cornea, and answers another important purpose, as we shall presently see. ❋ Robert Patterson (1857)
The conjunctiva and particularly that portion which covers the sclerotica, will be considerably injected, but there will not be the usual intense redness of inflammation. ❋ William Youatt (1811)
The conjunctiva is red; that portion of it which spreads over the sclerotica is highly injected, and the cornea is opaque. ❋ William Youatt (1811)
The cornea is a segment of a lesser sphere than the rest of the eye, and consequently makes it more prominent on the fore part: it is transparent, and firmly connected by its edges to the sclerotica. ❋ Thomas Garnett (1784)
The proper coats of the eye are reckoned five in number; viz. the sclerotica, cornea, choroides, iris or uvea, and the retina. ❋ Thomas Garnett (1784)
The tunica sclerotica, viewed through the conjunctiva, forms what is called the white of the eye. ❋ Thomas Garnett (1784)
The tunica sclerotica consists of two layers, which are with difficulty separated. ❋ Thomas Garnett (1784)
_Ophthalmia lymphatica_ is a kind of anasarca of the tunica adnata; in this the vessels over the sclerotica, or white part of the eye, rise considerably above the cornea, which they surround, are less red than in the ophthalmia superficialis, and appear to be swelled by an accumulation of lymph rather than of blood; it is probably owing to the temporary obstruction of a branch of the lymphatic system. ❋ Erasmus Darwin (1766)
For the eye may, with great propriety, be compared to a camera obscura; the rays which flow from external objects, and enter the eye, painting an inverted picture of those objects on the retina: if you carefully dissect from the bottom of an eye, newly taken out of the head of an animal, a small portion of the tunica sclerotica and choroides, and place this eye in a hole made in the window shutter of a dark chamber, so that the bottom of the eye may be towards you; the pictures or images of external objects will be painted on the retina in lively colours, but inverted. ❋ Thomas Garnett (1784)
