Cylinder -3.00: This refers to the cylindrical component of the lens prescription. The value of -3.00D indicates the amount of diopters of cylindrical correction needed to correct for astigmatism. Astigmatism is a condition in which the cornea or lens of the eye is not perfectly round, resulting in blurred vision at all distances. The cylindrical correction provided by the -3.00D lens will help to correct for this distortion and improve visual acuity.
Axis 164: This refers to the axis of the cylindrical correction. The value of 164 degrees indicates the orientation of the cylindrical lens in relation to the horizontal plane. In this case, the axis is 164 degrees, which means that the cylindrical lens will be positioned at an angle of 164 degrees from the horizontal plane.
In summary, this lens prescription provides 75D of spherical correction for nearsightedness and -3.00D of cylindrical correction for astigmatism, with the cylindrical lens oriented at an angle of 164 degrees.