Contact Prescription To Glasses

Contact lenses made to conform to a glasses prescription would be stronger than necessary, which could cause vision problems. Finally, your glasses are shaped to correct for astigmatism (irregular curve in the cornea or lens). However, contacts must be designed to fit the astigmatism, if there is one.

A contact lens fitting and a prescription written by a licensed eye care professional are required even if you have no need for vision correction and want only “non-prescription” (plano) colored contact lenses or special-effect contact lenses to change the appearance of your eyes.

Contact lenses made to conform to a glasses prescription would be stronger than necessary, which could cause vision problems. Finally, your glasses are shaped to correct for astigmatism (irregular curve in the cornea or lens). However, contacts must be designed to fit the astigmatism, if there is one.

If your prescription for glasses contains either -0.25 or -0.50, the ‘Cylinder’ will appear as blank (no Cylinder) on your contact lens prescription. Sometimes, depending on the person, even a ‘Cylinder’ of -0.75 on glasses prescription can be completely removed from a contact lens prescription.

Here’s a handy tool for eye care practitioners! Use our Sphere Spectacle Conversion Calculator* to easily convert a patient’s eyeglasses prescription to the corresponding contact lens parameters and use your expertise to make further refinements. Refer to our Toric or Multifocal calculators for other prescriptions.

Contact prescriptions differ from glasses prescriptions. Because contact lens prescriptions require different information, including the size and shape of the lenses, the two prescriptions contain different details. It is important to understand the differences before converting contact prescriptions to glasses.

Eyeglass prescription and Contact lenses prescription are not the not the same. They differ significantly because of their positioning. Glass lens is placed approximately 12 millimeters away from your eyes in order to focus the power of the lens properly to the eyes, whereas contact lens is placed or rested directly on the surface of your eyes.

A + in the box indicates that you are long-sighted which means you find it difficult to see things close to you. A – shows that you find it hard to see things that are far away without glasses. The number might be very small, like 0.25, or a large number, like 6.00. The higher the number, the stronger the prescription lenses


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