cycloplegia

For example, both cause mydriasis, but parasympatholytics reduce accommodation (cycloplegia) while sympathomimetics do not.

With administration of a ganglion-blocking drug, the ciliary muscle cannot contract (cycloplegia) and the patient loses the ability to focus their eyes.

Loss of accommodation (loss of focusing ability, blurred vision - cycloplegia)

Recent studies report that autorefractor measurements without application of cycloplegia can result in significant overestimation of myopia.

'Cycloplegia' is paralysis of the ciliary muscle of the eye, resulting in a loss of accommodation (eye).

Tropicamide is an antimuscarinic drug that produces short acting mydriasis (dilation of the pupil) and cycloplegia when applied as eye drops.

Cycloplegia with accompanying mydriasis (dilation of pupil) is usually due to topical application of muscarinic antagonists such as atropine and cyclopentolate.

Effects of ingestion can include paralysis of smooth muscles, confusion, tachycardia, dry mouth, diarrhea, visual and auditory hallucinations, mydriasis, rapid onset cycloplegia, and death.

Drugs such as tropicamide are used in medicine to permit examination of the retina and other deep structures of the eye, and also to reduce painful ciliary muscle spasm (see cycloplegia).

Atropine induces cycloplegia by paralyzing the ciliary muscles, whose action inhibits accommodation to allow accurate refraction in children, helps to relieve pain associated with iridocyclitis, and treats ciliary block (malignant) glaucoma.

Atropine is also used in such a way but its effects can last up to 2 weeks, along with the mydriatic effect; it produces cycloplegia (a condition in which the crystalline lens of the eye cannot accommodate to focus near objects).

If the drug pilocarpine is administered, the pupils will constrict and accommodation is increased due to the parasympathetic action on the circular muscle fibers, conversely, atropine will cause paralysis of accommodation (cycloplegia) and dilation of the pupil.

The drug is used in eye drops to induce mydriasis (pupillary dilation) and cycloplegia (paralysis of the eye focusing muscle), primarily in the treatment of eye disorders that benefit from its prolonged effect, e.g. uveitis, iritis, iridocyclitis, etc.