| Wizkid 2004-10-29, 7:16 pm |
| Conductive Keratoplasty for Presbyopia
Conductive keratoplasty (CK) is a vision correction procedure that
uses radio frequency energy instead of a laser to reshape the contours
of the eye. This study reported the 6-month results of a one-year
clinical trial evaluating conductive keratoplasty for the treatment of
presbyopia in emmetropic and hyperopic eyes. A total of 143 patients
with presbyopic symptoms were enrolled in this one-year FDA clinical
trial and were treated to improve near vision in one eye.
Additionally, thirty-three fellow eyes were treated to improve
distance vision. The target refractions for near vision correction was
-2.00D in the non-dominant eye and plano for distance vision
correction in the dominant eye.
Of the eyes treated for near, 77 percent had uncorrected near vision
of J3 or better at 6 months postoperatively. A total of 85 percent of
all patients had uncorrected binocular distance visual acuity of 20/25
or better along with J3 or better near acuity. Sixty-six percent of
eyes treated for near had a manifest refractive spherical equivalent
(MRSE) within 0.50D of target refraction at 6 months. In 89 percent of
eyes, the MRSE changed 0.05 D or less between 3 and 6 months
postoperatively. Seventy-six percent were very satisfied or satisfied
with their procedure.
CK appears to be reasonably safe and effective in producing functional
visual acuity in presbyopic eyes up to 6 months following the
procedure. Patient satisfaction with the procedure is similar to that
of monovision LASIK.
SOURCE: McDonald MB, Durrie D, Asbell P, Maloney R, Nichamin L.
Treatment of presbyopia with conductive keratoplasty: six-month
results of the 1-year United States FDA clinical trial. Cornea.
2004;23(7):661-668.
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