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The effects of atropine on the central nervous system include memory disruption, which may lead to severe confusion. [74] The major effects of belladonna consumption last for three to four hours; visual hallucinations can last for three to four days, and some negative aftereffects are preserved for several days.
It is applied as eye drops. [3] Effects occur within 40 minutes and last for up to a day. [3] Common side effects include blurry vision, increased intraocular pressure, and sensitivity to light. [3] Another rare but severe side effect is psychosis, particularly in children. [3] It is unclear if use during pregnancy is safe for the fetus. [5]
Spasm of accommodation is frequently resistant to treatment. However, some patients do find relief through the use of daily eye dilation with cycloplegic drops. One side effect of cycloplegic drops is that they often have BAK as a preservative ingredient, which, with daily use, can erode the tear shield:
When applied to the surface of the eye, side effects may include a brief period of blurry vision and discoloration of contact lenses of the soft type. [7] [3] When used by mouth or injection, side effects may include headache, nausea, and a change to the color of the skin for a brief period of time. [3] Allergic reactions may rarely occur. [3]
Dendrobine is an alkaloid found in Dendrobium nobile at an average of 0.5% by weight. [1] It is a colorless solid at room temperature. It is related to the picrotoxin family of natural products. [2] When given a fatal dose, death is usually caused by convulsions. [1]
Dry eye syndrome can lead to blurred vision, instability of the tear film, increased risk of damage to the ocular surface such as scarring of the cornea, and changes in the eye including the neurosensory system. [2] [6] Dry eye occurs when either the eye does not produce enough tears or when the tears evaporate too quickly. [2]
Symptoms include blurred vision in both eyes, but the onset may occur at a different time in each eye. There are yellow-white placoid lesions in the posterior pole at the level of the retinal pigment epithelium. Some suggest a genetic predisposition to the disease, while others postulate an abnormal immune response to a virus. [2]
Most commonly associated with cataract surgery and certain medications, such as sildenafil, cyanopsia is typically a temporary side effect rather than a standalone disease. The condition primarily affects the retina , the light-sensitive layer at the back of the eye , and sometimes the optic nerve , which transmits visual signals to the brain .