font size

Definition of Test, eyedrop

Test, eyedrop: There are many types of eyedrops.

One of the most common uses for eyedrops is pupil dilation. Dilating the pupil enables your eye care professional to see more of your retina, the light-sensitive layer of tissue at the back of your eye.

Dilating (widening) the pupil permits the retina to be examined for signs of disease. To do this, drops are placed into the eye to dilate (widen) the pupil. After the examination, your vision may (or may not) remain blurred and bothered by the brightness of the sun for several hours.

The pupil is the opening in the center of the iris, it is not a structure and does not move itself. It is the iris that dilates or constricts and enlarges or restricts the size of the pupil. The size of the pupil determines how much light is let into the eye.

Dilation is the process of enlargement or expansion. Things don't just open in medicine; they dilate. The word "dilatation" means the same thing as dilation. Both come from the Latin "dilatare" meaning "to enlarge or expand."

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=8537
Last Editorial Review: 9/20/2012

Drug Medical Dictionary of Terms by Letter

Top RxList Drug News

WebMD Daily

Get breaking medical news.

advertisement
advertisement
Use Pill Finder Find it Now See Interactions

Pill Identifier on RxList

  • quick, easy,
    pill identification

Find a Local Pharmacy

  • including 24 hour, pharmacies

Interaction Checker

  • Check potential drug interactions
Search the Medical Dictionary for Health Definitions & Medical Abbreviations