OD : Right eye.

OG : Left eye.

1 Ray : Can be written BC, RC or r0.

2 DiameterCan be written DIA or Ø.

3 Power or SphereMay be preceded by a +, a - according to the correction or 0 (plan).

4 Cylinder : Only for saying rings or astigmatic lenses.

5 Axis : Only for lenses called toric astigmatism (asssociée with the cylinder).

6 Addition : Only for the so-called progressive lenses it can have a value or to note Higt / Medium / Low.