Hyoscyamine
Amblyopia, or "lazy eye," is the most common cause of visual impairment in children. It happens when an eye fails to work properly with the brain. The eye may look normal, but the brain favors the other eye. In some cases, it can affect both eyes. Causes include:
- Strabismus - a disorder in which the two eyes don't line up in the same direction
- Refractive error in an eye - when one eye cannot focus as well as the other, because of a problem with its shape. This includes nearsightedness, farsightedness, and astigmatism.
- Cataract - a clouding in the lens of the eye
It can be hard to diagnose amblyopia. It is often found during a routine vision exam.
Treatment for amblyopia forces the child to use the eye with weaker vision. There are two common ways to do this. One is to have the child wear a patch over the good eye for several hours each day, over a number of weeks to months. The other is with eye drops that temporarily blur vision. Each day, the child gets a drop of a drug called atropine in the stronger eye. It is also sometimes necessary to treat the underlying cause. This could include glasses or surgery.
NIH: National Eye Institute
Physician's Materia Medica on Hyoscyamine
The leaves of HYOSCYAMUS NIGER, Lin. Anodyne, antispasmodic, hypnotic. Often prescribed in acute mania, hypochondriasis, de lirium tremens, dementia accompanied with excitement; in cough mixtures; associated with cathartics to prevent griping; as a sedative for children. taking the place of opium; for nausea of pregnancy, etc. Contains Hyoscine, q. v., as its most important active constituent (associated with Hyoscyamine and Atropine). Dose, 0.3 to 1.0 Grm. (5 to 15 grs.).1
Alkaloid found in many mydriatic drugs; closely related to Atropine and isomeric with that alkaloid. Dose, 0.0003 to’ 0.0015 (1-200 to 1-40 gr.). b. iron Hypophosphite (Ferrous or Ferric). Hematic tonic as well as nerve food. Dose, 0.03 to 0.30 Grm. (1/2 to 5 grs.).1