Line On Toric (astigmatism-correcting) Contact Lenses?
November 9, 2009 by admin
Filed under FAQ on advance for astigmatism
I noticed a radial line on my toric (astigmatism-correcting) contact lenses, Acuvue Oasys for Astigmatism. Is this line supposed to be pointing superiorly if the lenses are placed correctly? Or is it supposed to be pointing laterally / medially / inferiorly, or is the direction of the line not related to the correct placement?
The line on your contact is related to the correct orientation of the contact on your eye. Your optometrist uses these “tic marks” to see if the contact has a tendency to sit on your eye at a certain orientation or if the contact is unstable and rotates constantly.
Different brands of contacts use different markings. Some use a single tic mark placed at 6 ‘o clock on the contact lens, some use 3 placed at 3, 6, and 9 ‘o clock, and others use 3 placed at 5, 6, and 7 ‘o clock. I’m not sure off the top of my head what Acuvue uses on their lenses.
Ideally, you would want to place the lenses in your eye in the correct orientation, but this really isn’t necessary. Contacts that correct for astigmatism are designed in such a way as to orient themselves correctly on the eye after a few minutes.
Hope this helps!
You are so lucky I came by this section…
That is the same EXACT prescription I use!
Acuvue Oasys Astigmatism…. (with hydraclear plus)
When you take the contact out of the casing, use your fingers to gently place it on your index finger…. make sure the outer rim is a circle- not oval, and make sure the inner ring is flat against your finger, before insertion. The line goes like this / from in to out…..
The line is slightly visible, don’t worry about the line too much and focus on the directions I gave you…
The line is the bottom of the lens. Its meant to help you insert them correctly, but doesn’t really make a difference as toric lenses are designed to rotate to the correct position. I use conventional lenses and have dots on mine.