Check contact 50



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The diameter about a contact lens is a measurement in millimeters from one edge of the lens to the additional. Diameter yous powerful in determining the way in which some contact lens fits on your eyes. Soft contact lenses manufactured from Acuvue and Frequency lenses by Coopervision are available in many different fashions, sizes also prescription energy. Acuvue and Frequency speak to have diverse diameters which may be measured and compared in many ways.

Instructions

Things You'll Need

Millimeter ruler (notice Assets) Clean towel

Suggest Edits

1 By law, you are titled to any duplicate regarding your contact lens prescription. eye check chart picture by Keith Frith from Fotolia.com

Get some copy of your contact lens prescription if you are comparing Acuvue and Frequency lenses for your own operate. The U.S. Food and Drug Administration and Federal Market Commission stipulate that your vision-care practitioner need to give you a copy of your current contact lens prescription.

2 Look to the diameter of the Acuvue or Frequency lens on the written prescription. Your prescription will reference the two eyes. OD indicates the suitable eye and OS represents the left eye. Diameter may be written out or abbreviated as "Dia.," and the dimension of the lens will follow, written in millimeters---for instance, 13. website or 14.2.

3 Manually plan the size of an Acuvue or Frequency lens along with some millimeter ruler (see Assets) if you do not have your penned prescription. Rest a clean towel on a flat surface. Place your Acuvue or Frequency lens gently on the towel plus location your thumb and index finger over the lens to hold it in location and flatten the contact out as much being possible. Method across the widest element of the lens to obtain a diameter. Most smooth contacts boast any diameter of 12. internet site to 14. internet site millimeters. Measuring the lens this way will give you a close estimation of the diameter of an Acuvue or Frequency lens.

4 Examine the diameter of all Acuvue and Frequency lenses by viewing their product specification sheets (observe References). Acuvue provides the diameters of all thems lenses on some sheet. Coopervision has independent product specification sheets for each type of Frequency lens. The diameter of each type of lens is listed with a column on the product sheets from both companies.

5 Word the range regarding diameters in Acuvue and Frequency lenses remains similar. Each and every type regarding lens works on your cornea on a slightly different way. The diameter remains the dimension across the lens but is affected through the lens thickness, strength and material, which varies with each type of lens. Your eye-care professional defines the suitable diameter of the lens through testing several distinct lenses on your eye for comparison during your primary lens fitting.

References

FDA: Purchasing Contact Lenses Acuvue Contact Lens Product Specification Sheet Frequency 38 Product Specifications Frequency 55 Product Specifications Frequency 55 Toric Item Specifications

Means

Printable Millimeter Ruler All About Vision.com: Understanding Your Contact Lens Prescriptions

contact on finger image by Melking from Fotolia.com							eye test chart image by Keith Frith from  Fotolia.com