Expert Contact Lens Presciption Tips

Contact Lens Base Curve

Every eye will have its own base curve which may range from 8.0 to 9.5. The doctor fits the lens with the curvature most appropriate for your eye. Most disposable contact lenses come in several different base curve values. Here are some Expert Disposable Contact Lenses Tips Base curve values differ with every brand - a base curve 8.6 in one brand of contact lenses may not be the same in another.

New law on contact lens prescriptions

On February 4th this year, a new Federal Law called the “Fairness to Contact Lens Consumers” Act came into effect making it much easier for you to enjoy the savings and convenience of ordering on-line. Your eye doctor will provide you with the latest prescription after examining you.

Plus and Minus Powers

Your contact lens prescription contains a parameter called power (or sphere) which relates to the vision correction applied by the contact lens. If you are short sighted, this number will be positive and vice versa if long sighted.

Contact Lens Prescriptions against Eyeglass Prescriptions

A contact lens prescription may vary from an eyeglass prescription. In addition to the lens power, your contact lens prescription contains several other pieces of information like base curve, diameter, power, and expiration date. Toric and bifocal contact lenses also contain more numbers specific to those types of lenses.

Contact Lens Prescription Expiration

A contact lens prescription is usually only good for about a year from the date it was issued. However, the prescription may expire before that if certain medical conditions change. It is essential to have your eyes examined periodically and update your prescription on a regular basis.