In astigmatism, the cornea (the clear dome that covers your eye) or the lens (which focuses light rays on the light-sensitive ...

Astigmatism, derived from Greek meaning "without spot," refers to a common refractive condition that decreases acuity. Astigmatism has both a magnitude and a direction, or axis, unlike spherical ...

Miller PCRI Nomogram: for symmetric 'bow tie' astigmatism on corneal topography, paired incisions are made in the steep axis, just inside the limbus. The incisions are 500–550 microns deep and ...