Under this head we shall include Amaurosis, and the various forms of weakness of sight, most frequently met in practice.

The causes are exceedingly numerous, and sometimes difficult to detect. It may arise, as in amaurosis, from a weakened, paralyzed, or diseased state of the retina or optic nerve. It may be occasioned by inaction or derangement of some of the various branches of nerves, which pass to different parts of the eye, and not unfrequently by gastric, nervous, or catarrhal derangement, or general weakness of the entire system, occasioned by disease, too frequent sexual indulgence, and self-pollution, long-continued watching, great mental anxiety or trouble. It may also be occasioned by too great labor of the eyes, exposure to strong light, constant reading, especially in the twilight, and that variety of employment which requires close application.

* For a description of the eye, see plate 1, and Anatomy.

Amaurosis, sometimes coming on gradually, at others running its course with great rapidity, may end in partial or entire blindness. If neglected too long there is but little hope of relief, yet if taken in time, it can speedily be removed by a judicious homoeopathic treatment. There may be more or less pain about the eyes and the head, a dimness of sight, every thing looking thick and muggy, or appearing as if seen through a network, black specks before the eyes like moats or cinders, multiplying in number until the whole becomes dark, or the first symptoms may be a remarkable diminution of the apparent size of objects; thus a horse may not appear larger than a dog.

Treatment.* - In all forms of weakness of sight particular attention should be directed to the general health the causes of the trouble should be carefully avoided and the utmost care taken to live in accordance with the laws of nature. Pure and bracing air, out-door exercise, healthy nourishing food, frequent bathing, and a cheerful disposition, are of vast importance. As it regards some of the various causes, where the disease has been produced by employment in fine work, Bell., Ruta, Calc., or Spig. may be consulted.

Where the result of debilitating causes: Natr.-m., Chin., Phos.-ac. Nux-v., Sulphur.

* For general directions as to the administration of remedies, see page 12.

From abuse of spirituous liquors: Chin.,Lach.,Nux.-v., Opium.

The result of a cold: Bell., Dulc., Euph., Pulsatilla,

In aged persons: Aur., Con., Op., Secale.

In scrofulous persons: Bell., Calc., Merc, Sulph., Aur., Hep-s., Iodine.

The result of rheumatism: Cham. Euph, Merc, Puls., Pus., Hell., Spig., Causticum.

Of suppressed eruption: Calc., Caust., Sil., Merc, Sulphur.

Abuse of mercury: Aur., Nit.-ac., Bell., Hyos., Nux-v.

Connected with congestion to the head: Op., Bell., Hyos., Nux vom.

With disease of the ear: Nit.-ac., Petrol., Pulsatilla.

With gastric or abdominal affections: Caps., Cocc., Nux-vom., Puls., Staphysagria.

With uterine derangement: Plat., Sep., Con., Cic, Sulph.

With pulmonary affections: Calc., Hep.-s., Tod., Sil., Phosphorus.

Symptomatic Indications

Aurum. - Flames and sparks or black points before the eyes; appearance of objects as if they were divided horizontally.

Belladonna

Dilated or insensible pupils; great intolerance of light; flames, black points or colored or silvery spots before the eyes; nocturnal blindness commencing at sunset; pressive and shooting pain, extending to the orbit and forehead.

Calcarea

Confusion of sight as if looking through a mist, especially when reading; intolerance of light; dilated pupils.

Cicuta

Frequent suspension of vision, vertigo, wavering of objects before the sight, and apparent move-ment of letters when reading.

Hyosciamus

Nocturnal blindness, dilated pupils, strabismus, and illusions of sight.

Mercury

Cloudiness of sight; black points, sparks and dancing motes before the eyes; sudden attacks of blindness; great sensibility of the eyes; shooting or pulsative pain.

Nux-V

Sparks or spots before the eyes; sensibility to the brightness of day; heaviness and contraction of the eyelids.

Phosphorus

Sudden attacks of blindness; objects appear as if covered with a grey veil; sensibility to the brightness of day, and black spots before the eyes.

Pulsatilla

Confused sight as if looking through a fog, or something which might be removed by rubbing; intolerance of light with shooting in, or flaming circles before the eyes; contraction of the pupils, and profuse discharge of tears.

Ruta

Confusion of sight as if looking through a mist; dancing black points before the sight, and pressing, burning pains in the eyes, especially when fatigued.

Silicea

Momentary attacks of blindness, confusion . and pale appearance of letters when reading; black spots before the eyes, intolerance of light, and discharge of tears.

Sulphur

Confusion of sight as if looking through a mist, or a black veil were before the eyes; intolerance of light; sudden attacks of blindness by day; sparks, dancing moats and black spots before the eyes; profuse discharge of tears or excessive dryness of the eyes.

Agaricus

Incipient amaurosis; indistinct sight; every thing appears obscured as from muddy water, or surrounded with mist, or as if covered with cobweb; double sight, black motes hovering before the sight Consult also Ophthalmia.

Administration

Two drops, or twelve globuus, in a tumbler, a tablespoonful at a dose; or a powder, or six globules, dry on the tongue. A dose may be administered from once to three times a day.