Which of the Following Keratometry Readings Is Considered Shorthand and Thus

Multiple Choice

Which of the following keratometry readings is considered shorthand and thus omits the axis of the flatter meridian?

A) OD 42.25 x 175 / 43.50 x 85
B) OD 42.25 / 43.50 x 85
C) OD 42.25 x 175 / 43.50
D) OD 175 / 43.50 x 85