Understand the symbols and abbreviations that appear in the packaging of contact lenses.
Initially it is good to realize some of the visual problems that we have.
For the use of contact lenses there are 4 major defects: myopia, hyperopia, astigmatism and presbyopia.
| OD | R |
RIGHT EYE |
| OE | L | OS |
LEFT EYE |
| SPH | PWR | D |
SPHERE - spherical power of the lens in the case of Myopia presents the sign (-) and hyperopia (+). |
| CIL | CYL |
CYLINDER - Represents the amount of astigmatism, is the power cylindrical (toric) lens |
| AXIS | AX | X |
AXIS, reference to orientation (location) of astigmatism, indicating that the area in the eye where the lens needs more power. |
| DIA | Ø |
DIAMETER contact lenses |
| Bc | r0 |
BASE CURVE - Base curve (radius) is the concavity of the lens. |
| Add | AD |
ADDITION, appears only in progressive multifocal lenses that are lenses for presbyopia (commonly called, eyestrain) |
| D or N |
In the case of progressive lenses some manufacturers use different geometries on the lenses, the DOMINANT D eye and ND or N NO DOMINANT eye |
When you make a purchase, especially if it's online there is always the fear of failing to give proper details of the lenses.
If at the end of this explanation still having doubts have several options:
- Use our online chat whenever we are online it appears at the end of the homepage.
- Send an email to: mail@projectooptico.pt
- You can move ahead with the purchase, do not use data on the lens but add the image of the box or recipe.
- Phone - 00351 21 222 24 65 or 00351 934 293 817, we will made the order for you.
The purchase of contact lenses must be accompanied by a contact lens prescription provided by a credible expert (Optometrist or Ophthalmologist).
When you already have an account continuous lenses and not changes your prescription, you may reacquire lenses previously prescribed.
Learn more at our website: www.projectooptico.pt/site
