Contact lenses radius?!
Question: my first contacts had a radius of 8.6 and they were perfect. than they gave me 8.3 and my lenses kept sliding up. i assume that was why.
i want to buy expressions coloured lenses but the only radius they have is 8.7. would they be ok?
how important is the radius and how does it affect the fit of the lens?
thanks
Answers: my first contacts had a radius of 8.6 and they were perfect. than they gave me 8.3 and my lenses kept sliding up. i assume that was why.
i want to buy expressions coloured lenses but the only radius they have is 8.7. would they be ok?
how important is the radius and how does it affect the fit of the lens?
thanks
The base curve...( radius)..is very important in how a contact lens fits.
If you were wearing 8.6 , then an 8.3 certainly won't work.
But an 8.7 will
The base curves fit 1/10 either side...so an 8.7 is the same as an 8.6 or 8.8
They're supposed to size your eyes up before they give you something. The sample contact lenses always slip from my eyes, but my real prescription ones are comfortable. At first, even my prescribed lenses slipped. But later my eyes changed shape and adjusted. Lenses do change the shape of your eye, but only as long as you wear them. They go back in about 2 weeks of not wearing them. Thats why you have to leave them off before you go for laser surgery, then they can take a proper measurement of your eyes.
Don't get colored lenses, they're just a waste of money and they are less comfortable. Unless your willing to give up comfort for style and have money to waste.
Edit: My aunt gets these bubbles close to her eyes caused by infections she got from wearing to contact lenses. The doctor has to drain them all the time, but sometimes she pops them and she gets scars.
You should only buy and wear contact lenses that have been prescribed for you. If your optician has prescribed one brand then the prescription is only valid for that specific lens. Fitting contact lenses is not just as easy as selecting the radius, the base curve, prescription and lens material needs to be taken into account as well.
If you are buying lenses off the Internet that are not exactly the same as your optician has prescribed then the person you are buying them from is breaking the law and you are taking risks with the health of your eyes.
If you want a different lens then get your optician to check them for you.