Can you put contact lenses in the wrong way round?
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Can you put contact lenses in the wrong way round?
Inserting a contact lens the wrong way round doesn’t just make the lens ineffective at correcting vision. It can be an uncomfortable experience, and may cause damage to your eye if worn for long periods of time.
Is there a difference between 8.7 and 8.6 base curve?
“Is there a big difference between 8.6 and 8.7 base curve in contact lenses?” No, the difference is small. The 8.7 curve is . 1mm flatter, but since these are soft lens curvatures, and soft lenses assume some of the shape of the cornea, the fitting value won’t be changed dramatically.
Is 8.4 or 8.6 base curve?
Studies show that a single base curve of 8.4mm managed a “good or better” fit in approximately 90\% of individuals,1 and base curves of 8.4mm and 8.6mm together encompassed 98\% of individuals….
| LENS | BASE CURVES AVAILABLE (mm) | DIAMETERS AVAILABLE (mm) |
|---|---|---|
| 5 | 8.6 | 14.0 |
| 6 | 8.5, 9.0 | 14.2 |
| 7 | 8.4, 8.8 | 14.0 |
| 8 | 8.7 | 14.2 |
Does base curve of contacts matter?
Yes they do matter. The BC, or base curve, is measured based on your cornea’s curvature. If the base curve is too small, it’ll squeeze your eye, and if it is too big, it won’t stay on your cornea. These both may cause damage to your eye.
Why do my contacts get blurry?
However, sometimes things can start to look a little blurry when you’re wearing your contacts. Some of the possible causes of blurry vision while wearing contacts include a change in your prescription, deposits (like dirt) on the lens surface, dry eyes, allergies, infections, or other eye health problems.
Why is my vision blurry after taking out contacts?
If the blurry vision that you are experiencing is still present after the contacts are removed, it could indicate a more serious eye health problem such as corneal swelling, infection, inflammation, cataracts, retinal problems, or many other conditions. If the blurred vision persists, see your eye doctor immediately.
Can I wear contacts with a slightly different base curve?
Can I order contact lenses with a different base curve? You should never order contact lenses with a base curve that is different from your prescription. This can damage your eyes and cause problems with vision.
Does the BC on contacts matter?
How do I know my base curve for contacts?
Simple Rule for estimating lens base curve on a PLUS POWER lens
- For plus power use the spherical equivalent (SE) and add 4.00 diopters to that. For example, if you have an Rx of + 2.00 sphere, the base curve for the lens will be approximately 6.00.
- Rx +2.00Sph -> [+2.00 +4.00D] = 6.00BC.