<unk>  drugs are generally muscarinic receptor blockers. These include atropine, cyclopentolate, homatropine, scopolamine and tropicamide. They are indicated for use in<unk>  refraction (to paralyze the ciliary muscle in order to determine the true refractive error of the eye) and the treatment of uveitis. All<unk> s are also mydriatic (pupil dilating) agents and are used as such during eye examination to better visualize the retina. When<unk>  drugs are used as a mydriatic to dilate the pupil, the pupil in the normal eye regains its function when the drugs are metabolized or carried away. Some<unk>  drugs can cause dilation of the pupil for several days. Usually the ones used by ophthalmologists or optometrists wear off in hours, but when the patient leaves the office strong sunglasses are provided for comfort.
Cycloplegia
Iridoplegia
Monoplegia
Neuraxial blockade
Procaine blockade
Cardioplegia
Sympathicolysis
Myelokathexis