Abraham Lincoln, the 16th President of the United States, was assassinated by John Wilkes Booth on Good Friday, April 14, 1865, while attending the play Our American Cousin at Ford's Theatre in Washington, D.C., as the American Civil War was drawing to a close.
Eye drops have preservatives in them to ensure the sealed product remains sterile until the expiry date. After opening however, the preservative can only ensure the drops are safe for the eye for a period of 28 days. After this, using the drops can cause serious damage to the eye as bacteria may have been introduced. The ingredients themselves will also not be as effective and could be dangerous. Always record the date eye drops are opened and do not use them after 28 days. Some eye drops now have longer expiry dates after opening-always check the packet.
Dilating eye drops used for examination of the eye usuallylast 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 (irides), and occasionally a childâs eyes may stay dilated for longer than 24 hours. Children require stronger and longer lasting drops than do adults to accurately measure refractive error. Weaker drops are used for premature babies and neonates.