Understand the basics of the earnings per share ratio and how this important financial metric is calculated in Excel and ... Read Answer >>. The amount of shares outstanding in a company will often change due to a company issuing new shares, repurchasing and retiring ... Read Answer >>.
The duration of pupil dilation depends on the type and concentration of the drug used. Generally, dilation lasts three to six hours. Sometimes, the dilation can extend up to 24 hours if a more concentrated drug is used. Atropine is a common eye drop used to dilate pupils during eye examination. Eye color can also determine the duration of pupil dilation.
How Long Does Eye Dilation Last? Eye dilation from eye drops used for examination of the eye usually lasts from 4 to 24 hours, depending upon the strength of the drop and upon the individual patient. Pupil dilation tends to last longer in people with lighter colored eyes, since brown pigment in the iris is essentially the only eye pigment, blue eyes lack significant color and gain their blue shade from light reflecting in the iris.