Here are some common abbreviations found in ophthalmological/optometric prescriptions:

• OD: Right Eye
• Left Eye (OE):
• AO: Both Eyes
• ADD: Addition
• ESF: Sphere
• CIL: Cylinder
• AXIS: Cylinder orientation
• DNP: Naso-pupillary distance
• VL: Long-Distance View
• VP: Close-Up View

Sphere : Represents the degree of myopia* or hyperopia*;

Cylinder: Represents the degree of astigmatism (can be represented with a negative or positive sign)* and the axis represents the direction of astigmatism compensation;

Addition: This is the added value to distance vision to correct near vision in patients with presbyopia.

Naso-pupillary distance: the distance from the center of each pupil to the center of the nose. It can also be represented as DIP (interpupillary distance), which is the distance between both pupils.

When the value in the "Cylinder" field is negative (-), the astigmatism is compensated for by a negative cylinder, and it can be stated that:

- If in the "Sphere" field the sign preceding the value is negative (-), we are dealing with myopia;

On the other hand, if the sign preceding the value is positive (+), we are dealing with hyperopia.