PURPOSE To evaluate the efficacy and safety of conductive keratoplasty (CK) for the treatment of presbyopia and analyze the differences in the effects between post- and non-laser in situ keratomileusis (LASIK) eyes. Clinical preoperative factors that could affect the predictability of CK were also analyzed. METHODS The visual and refractive outcomes of CK for the treatment of presbyopia in 14...

FEBRUARY 2012 CAtARACt & REFRACtivE SURgERY todAY 39 A lthough much has been written on the topic, there is no universally accepted treatment for presbyopia. Therapies range from bifocal spectacles to scleral expansion to accommodating IOLs to corneal procedures such as presbyLASIK or conductive keratoplasty. An intrastromal approach is currently being investigated in FDA clinical studies for t...

Conductive keratoplasty (CK) was approved by the US Food and Drug Administration in March 2004 for the correction of hyperopia ranging from 0.75 to 3.00 diopters (D) and 0.75 D or less of cylinder in patients older than 40 years. With CK, hyperopic correction is achieved through the use of a nonablative radiofrequency that shrinks corneal stromal collagen and steepens the central cornea. A kera...

Since the early 1980s, civil airmen have been allowed to correct refractive error (i.e., myopia, hyperopia, astigmatism) with corrective surgery. Prior Federal Aviation Administration research studies have shown that the number of civil airmen with refractive surgery continues to increase. A study that reviewed refractive surgery use in civil airmen for the years 1994-96, reported that the larg...

PURPOSE To assess the regression rate of conductive keratoplasty (CK) in patients with or without previous laser-assisted in situ keratomileusis (LASIK) or photorefractive keratectomy (PRK). SETTING University of Utah, Medical School, John A. Moran Eye Center, Salt Lake City, Utah. MATERIALS AND METHODS A retrospective, age-matched chart review identified records of 6 patients who underwent...

A 41-year-old man presented 10 years after uneventful laser in situ keratomileusis (LASIK) with symptomatic post-LASIK ectasia. He had treatment with the classic Dresden epithelium-off technique and presented 4 years later with progression of the ectasia. He was subsequently retreated with conductive keratoplasty (CK) followed by a new proprietary epithelium-on corneal collagen crosslinking (CX...

PURPOSE To evaluate the data on the safety, effectiveness, and stability of conductive keratoplasty (CK), a thermal, radiofrequency-based technique for treating 0.75 to 3.00 diopters (D) of spherical hyperopia. METHODS A prospective, consecutive series, multicenter clinical trial involving 400 hyperopic eyes was conducted by 19 surgeons at 12 centers. The treatment goal was emmetropia. Cohort...

OBJECTIVE To document the 1-year safety, efficacy, and stability results of 355 eyes treated in the multicenter study of conductive keratoplasty (CK) used to correct low to moderate hyperopia. DESIGN Nonrandomized comparative (self-controlled) trial. PARTICIPANTS Twenty surgeons at 13 centers performed CK on the eyes of all patients enrolled in a multicenter, 2-year, U.S. phase III clinical...

PURPOSE To compare the measurement of contrast sensitivity at a distance in patients submitted to penetrating keratoplasty versus patients submitted to deep anterior lamellar keratoplasty for keratoconus treatment. METHODS Contrast sensitivity of fourteen subjects submitted to penetrating keratoplasty and fourteen subjects submitted to deep anterior lamellar keratoplasty have been analyzed th...