Understanding Your Contact Lens Prescription

Common refractive disorders of the eye such as myopia, hyperopia, astigmatism, and presbyopia are measured in units called diopters. Diopters represent the amount of correction you need to normalize your vision.  The more nearsighted, farsighted, or astigmatic you are, the higher your prescription in diopters.

Contact Lens Prescription

The prescription for your contact lenses will generally have a minimum of three parameters; the power (sphere), the base curve(BC) and the diameter(DIA).

• The power (sphere) is a number that will start with a + or - (i.e. +2.50, or -1.75). This will typically be a number between -20.00 and +20.00. A negative power is required to correct nearsightedness, while a positive power is used to improve farsightedness (+) of an eye.
• The BC is a measure of the curvature of the lens. This helps it fit your cornea more comfortably since some corneas are "steeper" or "flatter" than others. A typical BC is a number between 8.0 and 10.0. DIA stand for diameter, which is a measure of the size of the lens and is typically a number between 13.00 and 15.00.
• Cylinder is for toric lenses only, which is correction for Astigmatism, and will be a number between -4.00 and +4.00. Axis is for toric lenses only and will be a number between 0 and 180.

Contact Lens Suppliers

1-800 Contacts - At 1-800 CONTACTS, we are dedicated to providing you with a simple, fast, and less expensive way to replace your contact lenses.

VisionDirect - Vision Direct is a dynamic company dedicated to providing the highest quality service and the same brand name contact lenses that your doctor recommends.

ACLens - Save up to 70% on contact lenses when you buy from AC Lens.

LensQuest - We are dedicated to providing name brand contact lenses at discount prices accompanied by superior customer service.

Contact Lens Manufacturers

With all major manufacturers of contact lenses in our catalog and thousands in stock, we will have no problem filling your contact lens prescription.

Johnson and Johnson - Johnson & Johnson Vision Care, Inc., is a company committed to transforming the world's vision by increasing awareness of the importance of vision and vision care and providing the world's most exceptional vision correction options.

Ciba - Part of the global healthcare leader Novartis, CIBA Vision's research and development teams strive to bring new products to consumers and eye care professionals around the world - and a clearer and stronger vision to your life.

Cooper Vision - CooperVision makes many of the most advanced contact lenses available, including lenses for those of you who may have thought you could never wear soft contact lenses.

Bausch and Lomb - Bausch & Lomb's Vision Care business manufactures and markets the world's most comprehensive line of eye care products.

Ocular Sciences - When it comes to your vision, it's only natural to want the very best. That's why so many people have selected Biomedics Brand Contact Lenses from OSI/American Hydron.

Wesley-Jessen - Wesley Jessen VisionCare, Inc. is the manufacturer, developer and marketer of disposable soft contact lenses in United States and other countries.

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Contact Lens Suppliers and Manufacturers