ALL ContactLens365 users are applicable to get FREE eyechecks to get your prescriptions at our affiliated stores!

Contact Lens Prescription

Contact lenses are medical devices which require wearers to follow a prescribed process to get them. Having a valid prescription is the first step to start buy contact lens online & save up to 65% with

Need Prescription?

It is important to get an eye check at least once every two years. ContactLens365 offers free eye checks for our customers.

Free eye checks are available at the following affiliated stores.

*Please call to make appointment before heading down.


Blk 727, #01-254

Clementi West st 2, S120727

Tel: 6773 6909


Boon Lay

Blk 221, #01-218, boon lay place, S640221

Tel: 6254 1507


Paya Lebar Square

60 paya lebar road, #01-59/60, S409501

Tel: 6702 7229


Queensway Shopping Centre#01-48, S149053

Tel: 6471 1085

You can find your prescription on the piece of paper given to you by your optician during a check-up, on the end/side of your contact lens box or on the blister packs that contain your contact lenses.

Please be aware that a contact lens prescription is different to a glasses prescription, so you cannot use one for the other.

What does each prescription figure mean?

Base Curve (BC): The base curve determines what type of fit is required for the lens to meet the curve of your eye; this is usually written in millimetres or sometimes with the words: flat, median or steep.

Diameter (DIA): The diameter of the contact lens is also written in millimetres and determines the width that best fits your eye.

Power/Sphere (PWR/SPH): This figure shows whether you are long or short-sighted and how much correction your eyes require. If you are long-sighted your figure will begin with a + (plus sign) and if you are short-sighted it will begin with a – (minus sign). This will be followed by a number that goes up from 0 in measures of 0.25 dioptres, the higher the number the stronger the visual correction needed (this value can be displayed on the box as “PWR” or “D”).

Prescription Figures for Astigmatism

The below figures are only displayed on contact lens prescriptions where there is a need for astigmatism correction.

Cylinder (CYL): The cylinder will always been a minus number that increases in measures of 0.25. Much like the power/sphere figure that is shown on all standard prescriptions, the cylinder denotes the extra visual requirements needed for astigmatism and how severe the astigmatism is.

Axis (AX): Astigmatism is caused by the irregular curvature of the eye; the axis is a figure which determines the angle of the correction needed in order to see clearly. The Axis is always a number between 0 and 180 degrees.

Prescription Figures for Presbyopia

The below figures are only displayed on contact lens prescriptions where there is a need for presbyopia/multifocal correction.

Addition (ADD): If you suffer from presbyopia it affects your near vision, the Addition figure determines what level of correction you need to be able to see clearly at a close distance. This is a number between 0.50 and 3.00, some contact lens brands refer to this as a high, medium or low.