What is Conductive Keratoplasty?
Conductive Keratoplasty, often called CK used to treat presbyopia. CK uses radio waves to shrink the collagen at the outer edge of the cornea.
This increases the corneal curvature, increasing clarity at closer visual distances. Until 2007, when Monovision LASIK was approved, CK was the only FDA approved corneal procedure for treating
Presbyopia is a refractive error, or loss of clear vision, that occurs with aging. It usually begins when people are
in their 40s.
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It’s cause is believed to be either a gradual hardening or stiffening of the natural lens, or loss of muscle tone that controls this lens.
In either case, the lens doesn’t bend as well as in earlier years. The lens’ flexibility is what enables it to react to changes in visual distance and focus quickly and clearly.
How It Works?
Since Conductive Keratoplasty is used to reduce
it is primarily used to treat just the non-dominant eye. CK uses radio waves to shrink the collagen around the outer edge of the cornea.
As the collagen shrinks it pulls the outer edge tighter, which, in turn, increases the dome shape of the cornea. The steeper the dome, the better the focus for close vision. Your eye surgeon will mark the areas to shrink based upon how much change he wants in your vision.
In Near Vision conductive keratoplasty this procedure is used to create monovision. Flatter corneas focus better at far distances.
In monovision, one eye is treated to improve near vision and the other eye is left untreated to allow it to focus on distances.
By leaving the dominant eye untreated, it can focus for distance. Sometimes a contact lens is needed to get the best distance vision for the dominant eye.
It may take a few weeks to adjust to monovision, but the brain usually adapts well. The biggest adjustment to monovision is the loss of depth perception.
But, some people never adjust to monovision. So, it’s a good idea to try temporary monovision using contact lenses before surgery to be sure you can adjust well.
Pros and Cons of Conductive Keratoplasty:
can usually return to work the day after surgery painless may not need
for a long time more effective monovision than contacts or laser eye surgery
less blurring than with
laser eye surgery
treated eye may also see better at distances in some patients fuzzy vision improves within a week minimally invasive fewer complications than other refractive procedures recovery is slower than with
recovery and stable vision may take up to six
months monovision results in loss of depth perception effects diminish over time – may last 6 months to 2 years, and decrease gradually may see halos around lights
possible from surgery – this will correct itself without treatment
sufficient corneal tissue to do the procedure to treat presbyopia or farsightedness corneal shape within treatable range (correctable within 1-2 diopters) adequate tearing, moisture
thin or irregular corneas engage in hobbies or professional activities that are rough or pose risk of hitting eyes
lens prescription changes within two yearsprevious corneal surgeryblind in one eyecataractsglaucomapregnancy or nursing (lactating)corneal scarringtaking eye medications, steroids or immunosuppressants
or abnormalities that will slow healing such as:
Herpes simplex of the eye
hypertensionconnective tissue disorder
CK has risks that are similar to other laser eye surgery procedures. Though rare, the ones that occur most often include:
light sensitivity for about a week visual fluctuations normal for first few weeks over- or under-corrections halos or starbursts around lights erosion of the epithelium dry eye infection corneal scarring eyelid droop chronic discomfort inability to tolerate contact lenses
Return From Conductive Keratoplasty To Lasik