The drops used to dilate the pupils usually wear off after a few hours, but sometimes the effects last days. It's not common but in some people who are very sensitive to the drops, ...

Eye dilation refers to a widening of the pupils. When used for medical purposes, it typically lasts between 4 and 24 hours. Doctors sometimes use eye dilation drops to dilate a person’s pupils ...

Getting your eyes dilated is an important part of any complete eye exam. Once your doctor puts in the dilating drops, it takes about 20–30 minutes for your pupils to fully open, or dilate.

Prescription drugs you are taking may cause your pupils to dilate (mydriasis) or constrict (miosis). Among the medicines causing dilated pupils are decongesting nose drops, scopolamine patches ...

If your pupils are small because of inflammation in your eye, they can give you long-lasting dilating drops (atropine or homatropine) that make your pupils wider. These are a lot like the drops ...

Mydriasis is the medical term for an unusual dilation or widening of the pupils. There are various causes of this fixed dilation of the pupils. Normally, a person’s pupils dilate when the light ...

A recent study has found that “meaningful pharmacological dilation of pupils” after death is possible, according to a Lions Eye Institute press release. The study included 14 postmortem eyes ...

“In dim light, the pupils dilate to let more light in, but that will not occur if the pupils are constricted by pilocarpine,” Guyton points out. “I should think this effect can be a ...

During the Renaissance in Italy, women used eye drops made from a poisonous plant called Atropa belladonna (belladonna means “beautiful woman” in Italian) to make their pupils dilate. This gave them a ...

After 30 to 45 minutes, a normal pupil does not dilate while a Horner pupil dilates and the anisocoria reverses. The palpebral fissure enlarges (apraclonidine reverses the Horner syndrome).