Learn about the stages of dilation and effacement, what they mean for your labor and delivery, and common symptoms at each ...

Time dilation refers to the fact that time passes at different rates for different observers, depending on certain variables.

Eye dilation is an important part of a complete eye exam, but it may take up to 6 hours for the effects to wear off. Some people are more sensitive to the drops and may experience side effects for ...

Dilation and curettage (D&C) is a brief surgical procedure to remove tissue from the inside of your uterus. For a D&C, a doctor uses a small instrument and/or medicine to open your cervix. Then ...

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 ...

Dilation and curettage, or D&C, is a procedure that doctors use to remove tissues from the uterus. It has a number of uses, including diagnostic testing, miscarriage treatment, and pregnancy ...

Now, a German facility has measured time dilation very accurately. But in a twist, these measurements were performed on things moving at just under 40 percent of the speed of light in the laboratory .

Dilation enlarges your pupil to give your eye doctor a wider and clearer view of the retina, optic nerve and blood vessels in the back of your eye, said Dr. Andrew Morgenstern, ...

These new clocks can measure one of Albert Einstein’s predictions—time dilation due to gravity—on the smallest scale yet. Cutting-edge atomic clocks such as these use neither cesium nor quartz.

While dilation helps eye doctors see the retina, it also makes it difficult for patients to see at a close distance for several hours after an exam, and may cause sensitivity to light.