When the oblique Muscles are not equally swelled in their whole Extent, the Bottom of the Eye, pressed towards its Axis, forms no longer a regular Circumference, whose Points are each equally distant from the Lens. Therefore, of the Rays which fall on the Choroïdes, Part only have thereon their Focus; the other are yet too divergent to express a distinct Image. Thus even remote Objects cannot be distinguished but imperfectly. So far for the Investigation of the Nature and Cause of this Disease. Having been hitherto mistaken for a _Gutta Serena_ by Practitioners, it has accordingly been treated as such. Issues, Vomiting, Purging, Salivation, have all, occasionally, been tried; but every Method yet attempted to remove this Disorder, has been to no better Purpose than to confirm it. A rational Treatment of this Disease, I should imagine, cannot but be acceptable to the Public; I therefore proceed to point it out. The Indications for a radical Cure are three, relaxing, deobstructing, and restoring to their due Tone the ocular Muscles. In order that they may be relaxed, the Patient must avoid spirituous Liquors, Tea, Coffee, Chocolate, Aromatics, great Exercise, and violent Passions. He also must observe a low Diet; his only Drink, for a while, ought to be either Barley-water, Whey, Marsh-mallows Infusion, or Orgeate. Regimen being prescribed, the Cure is to be attempted by a moderate Bleeding at the Foot, which is to be repeated once every Week. Every Day (except those of Bleeding) the Patient should take, for a whole Month, two, three, or four Drachms of Cassia, according to the Strength of his Constitution. When his Fluids are well diluted, antispasmodic Suffumigations[22] are to be conveyed to the Eyes by a proper Instrument. Emollient[23] Pultises are likewise to be applied to the temporal Regions. These being made Use of, the Swelling of the ocular Muscles gives Way by Degrees, the obtuse Pain vanishes, the Globe of the Eye collapses, and Vision begins to be restored. Then some electrical[24]Sparks are to be drawn from the Canthi of the Eyes, Morning and Evening, during a few Weeks. Mean while, a Plaister of _Tacamahaca_ is to be worn on the Temples. These Remedies being calculated to remove all Obstruction of the affected Parts, promote the restoring of the Sight, and complete the second Indication. When Vision is nearly[25] in its former State, there remains only a Weakness of Sight, which is gradually removed by often washing the Eyes with fresh Water alone. Such is the Method I have pursued to perform the following Cures, being the only ones of the Kind I ever attempted.