What Is a Toric Lens?


Quick Answer

While a regular lens is shaped like a slice from a ball, a toric lens is shaped like a slice from the side of a donut, with a hole or depression in the middle area. Toric lenses are used in contacts and glasses to correct astigmatism.

Continue Reading
Related Videos

Full Answer

For corneal astigmatism, the way light is refracted within the eye differs between the horizontal and the vertical planes, creating a difficulty in seeing fine details or causing vertical lines to appear tilted. By using a toric lens, doctors can change the way light is bent at each point of the lens, matching the astigmatism perfectly.

Learn more about Optics & Waves

Related Questions