What Is the Difference in Regular Contacts Lenses and Toric Contact Lenses?

Question by leonsitaleon: What is the difference in regular contacts lenses and toric contact lenses?
my sister and i both wear contact lenses. Mine are regular and hers are toric. We have notice that hers are a lot more expensive that mine. What is the difference???
Thanks!!!

Best answer:

Answer by Sheena
Toric lenses are slightly larger, and are designed to “re-situate” on the eye each and every time you blink.

Answer by Katie Amber
I never knew there was a difference. I use toric now but used to use regular and haven’t seen or felt a difference.

Answer by Britter
Sheena is right about the “situation” but wrong about the size.

Regular contact lenses are called spherical contact lenses. It means that only one power is needed to correct your vision. It doesn’t matter how the lens rotates because the power is the same in every direction. You might notice that the numbers on the side of your contacts only have one number such as -2.50 D

Toric contact lenses are used to correct astigmatism, and as you have notices, they are indeed more expensive. Toric lenses have two different powers in them because that is what is needed to correct the astigmatism in your sister’s eyes. Because there are 2 different powers, the contact lens has to sit in a certain orientation. I bet your sister notices that it takes a split second for her vision to clear after she blinks hard on purpose. That’s because the lens slightly rotates when you blink and then it moves to wear it is supposed to go once it settles. You may notice that the numbers on the side of the box for your sister has 3 sets of numbers such as -2.50 -1.25 x 180. The first number is the spherical component (the same that you have) and the second number is how much astigmatism she has, while the last number is the axis (orientation or direction) that the astigmatism is at.

So the toric lenses are more expensive because it takes more work to make them, because you have to put 2 powers in them and you have to have other design elements that are going to make it sit at the appropriate rotation.

As far as everything else (size, base curve, etc), the parameters are the SAME for either spherical contacts or toric contacts because they are both soft lenses. So the doctor can change those things however they need for it to fit properly.

ADD:
Hippo37′s answer is not quite right. Toric lenses can correct BOTH nearsightedness and farsightedness, in addition to correcting the astigmatism. So for example, if your prescription for toric lenses says -2.25 -1.50 x 180 that would correct for someone who is nearsighted (and obviously also has astigmatism). If your prescription would say +2.25 -1.50 x 180, that would correct someone who is farsighted and has astigmatism. So basically, it is the (+) or (-) sign in front of that very first number that tells you if you are farsighted or nearsighted. Gernally, since it is more common to be nearsighted, toric lenses for nearsightedness and astigmatism are also more common.

The toric lenses do NOT “spin the eye to the correct position”. That would be impossible because you can’t exactly pull your eyes out of your sockets and turn them as you please. Your eyes stay exactly in the same position as they always are and as I explained above, the toric lenses correct the 2 different powers respective to your eye.

And yes, as I already explained above, there is more to their manufacturing so that is why they cost more.

Answer by hippo37
Toric lenses are for an astigmatism perscription as well as short sight. So your sister has an astigmatism and you don’t. It used to be you couldn’t get soft contacts for astigmatism but then they designed lenses which help by spinning in the eye to teh correct position. They are more expensive than “regular” lenses because there is more to their manufacture.

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