Central adaptive astigmatism is our term for the residual cylindrical correction that a ... IOL: Intraocular lens; PCRI: Peripheral corneal-relaxing incision.

People who don't have astigmatism have a cornea (the tissue that covers the front of your eye) and lens that are round, which ...

All of the lens cross-sections are spherical lenses. Unlike spherical lenses, cylindrical types have curved faces which can be considered part of a cylinder shape. This causes them to focus ...

Astigmatism occurs when our eye’s lens or front surface is irregular or cylindrical. Myopia occurs when the eyeball is too long, or the cornea is too steeply curved. Astigmatism, hyperopia and ...