Eye dilation refers to a widening of the pupils. When doctors dilate the pupils during an eye exam, it typically lasts between 4 and 24 hours. Doctors sometimes use eye dilation drops to dilate a ...

Experts disagree on who needs it and when. Here’s what the evidence suggests. By Michelle Crouch Perhaps the most unpleasant part of an eye exam is when the doctor squeezes in the dreaded drops to ...

On the other hand, Dr. William Barlow of the University of Utah's Moran Eye Center notes, "Dilation isn't always required. In fact, if you are seeing your eye doctor solely to get a prescription, ...

Eye dilation usually lasts four to six hours, but it can last longer depending on various factors. Light-colored eyes may stay dilated longer after an exam. After an eye exam, you may receive special ...

The dark part of your eye is called the pupil. Pupils can grow or shrink according to different lighting conditions. Other factors, such as drugs, can also affect pupil size. Read on to find out which ...

Many factors can influence pupil size. Typically, the pupils open up in low light situations to let in more light. However, some research suggests that attraction and mood might also cause pupil ...