BC, in the context of eyes, refers specifically to the base curve of a contact lens. The base curve, abbreviated as BC, is a critical measurement that determines how well a contact lens fits the curvature of your eye.
Understanding Base Curve (BC)
The base curve is measured in millimeters (mm) and is typically a number between 8 and 9. It is not a measurement found on a glasses prescription.
Key Points about BC:
- Curvature: BC represents the curvature of the back surface of the contact lens.
- Measurement: It's measured in millimeters (mm).
- Range: Typically, the BC value falls between 8 and 9.
- Importance: A properly matched BC is essential for comfortable and clear vision.
Why is Base Curve Important?
If your contact lens's base curve doesn't match your eye's natural curvature, it can lead to several issues, including:
- Discomfort: Poorly fitting lenses can cause irritation and pain.
- Poor Vision: An incorrect BC can lead to blurry vision and reduced visual clarity.
- Eye Health: Ill-fitting lenses can cause corneal abrasions or other complications.
Finding Your BC
- Prescription: Your eye doctor will measure your eye's curvature during an eye exam and include the appropriate BC on your contact lens prescription.
- Previous Lenses: If you've worn contacts before, your prescription will list the base curve.
- Professional Guidance: Always consult an eye care professional before trying new contact lenses or altering your current prescription.
Example
| Feature | Description |
|---|---|
| Abbreviation | BC |
| Full Name | Base Curve |
| Units | Millimeters (mm) |
| Range | Between 8 and 9 |
| Purpose | Measures the curvature of a contact lens |
| Key Point | Essential for comfortable and clear vision with contact lenses |
In summary, when someone refers to "BC eyes," they are generally talking about the base curve necessary for correctly fitting contact lenses to your individual eye shape. It's a crucial measurement for comfortable and safe contact lens wear.
