Prescription Colored Contacts: How to Read Your Eye Power

Quick answer

Your contact lens prescription lists specific measurements: sphere (power), cylinder (if you have astigmatism), axis, base curve, and diameter. To order prescription colored contacts, match the sphere, base curve, and diameter from your prescription. If you don't need vision correction, choose 0.00 power (plano). Always get a valid prescription from an eye care professional before ordering.

What do the numbers on my contact prescription mean?

A contact lens prescription includes several key numbers. Sphere (SPH) indicates your lens power for nearsightedness (negative numbers) or farsightedness (positive numbers). Cylinder (CYL) and axis are only present if you have astigmatism; cylinder measures the amount of astigmatism, and axis indicates its orientation. Base curve (BC) describes the curvature of the lens to fit your eye, and diameter (DIA) is the lens width. These values are different from your glasses prescription, so never use glasses numbers to order contacts.

How do I find my base curve and diameter?

Your eye care professional measures your base curve and diameter during a contact lens fitting. These values ensure the lens sits comfortably and stays centered. If your prescription doesn't list them, ask your optometrist for a copy that includes them. When shopping for colored contacts, check the product specifications: for example, Coleyes Block Green Yearly Cosplay Prescription Colored Contacts have a base curve of 8.5mm and a diameter of 14.0mm, while Coleyes Barbie Green Yearly Prescription Colored Contacts have a base curve of 8.6mm and a diameter of 14.5mm. A small difference in base curve can affect comfort, so match as closely as possible to your prescription.

Can I order colored contacts with my prescription?

Yes, many colored contacts come in prescription powers. For instance, Coleyes Glittering Brown Yearly Prescription Colored Contacts are available from 0.00 to -8.00 power, covering common nearsighted prescriptions. If you have astigmatism or need bifocals, check whether the brand offers toric or multifocal options; not all colored lenses do. Always verify the available power range before ordering. If your prescription falls outside the range, you may need to choose a different product or consult your eye doctor.

What if I don't need vision correction?

If you have perfect vision or want colored contacts purely for cosmetic reasons, select 0.00 power (also called plano). These lenses have no vision correction but still require a proper fit. Even with plano lenses, you should have a valid contact lens prescription that includes base curve and diameter to ensure the lenses are safe and comfortable. Never share lenses with others or wear lenses that haven't been prescribed for you.

How often should I replace my yearly colored contacts?

Yearly contact lenses are designed to be worn for up to one year from opening, with proper cleaning and storage. However, if you experience discomfort, redness, or blurred vision, remove them and consult your eye care professional. Always follow the replacement schedule recommended by your doctor and the manufacturer. Keep your lens case clean and replace it every three months.

Prescription colored contacts FAQ

Can I use my glasses prescription to order contacts?

No. Glasses prescriptions include a vertex distance and may have different cylinder and axis values. Contact lens prescriptions are specific to the lens type and must include base curve and diameter. Always request a contact lens prescription from your eye doctor.

What if my prescription is stronger than -8.00?

Most colored contacts, including the Coleyes options listed here, max out at -8.00. If your power is higher, you may need custom lenses or a different brand. Check the product's power range before ordering to avoid returns.

Do I need a prescription for plano colored contacts?

Yes. Even if you have 20/20 vision, a contact lens prescription ensures the base curve and diameter fit your eye properly. Wearing ill-fitting lenses can cause discomfort or damage. Schedule a contact lens exam even for cosmetic lenses.

Product facts

• Coleyes Block Green Yearly Cosplay Prescription Colored Contacts: Base curve 8.5mm, diameter 14.0mm, power range 0.00 to -8.00, water content 40%, material HEMA + NVP, yearly replacement. A smaller base curve and diameter may suit those with narrower eyes or a steeper corneal curvature; the power range covers many common prescriptions.
• Coleyes Barbie Green Yearly Prescription Colored Contacts: Base curve 8.6mm, diameter 14.5mm, power range 0.00 to -8.00, water content 40%, material HEMA + NVP, yearly replacement. A slightly larger diameter can provide a more dramatic color effect, but may not fit if your prescription specifies a smaller diameter.
• Coleyes Glittering Brown Yearly Prescription Colored Contacts: Base curve 8.6mm, diameter 14.5mm, power range 0.00 to -8.00, water content 40%, material HEMA + NVP, yearly replacement. Offers a natural brown shade with the same fit specs as the Barbie Green, making it a good option for subtle enhancement.