Conductive keratoplasty for presbyopia: 3-year results.
OBJECTIVE
To assess the long-term safety, efficacy, and stability of conductive keratoplasty (CK) in the treatment of presbyopia.


METHODS
Ten near-plano presbyopic patients (6 women and 4 men) underwent unilateral CK with standard-pressure technique in the non-dominant eye to improve their near vision. Mean age was 51+/-3.1 years (range: 46 to 56 years). Nine of the 10 patients were available for both 1- and 3-year follow-up examinations.


RESULTS
Preoperative mean manifest refraction spherical equivalent (MRSE) was -0.17+/-0.29 diopters (D), yielding a mean near uncorrected visual acuity (UCVA) of J10. Three years after CK, the mean near UCVA was J3. The mean MRSE at 3 years was -1.06+/-0.81 D, which represents a 0.25 D change from the MRSE at 1 year. The MRSE in the dominant untreated eyes had a +0.26 D change during the 3-year period, which was not statistically different when compared to the CK-treated eyes during the 3-year postoperative period. No eye lost best spectacle-corrected visual acuity or had induced cylinder > or =0.75 D. Seventy-eight percent had binocular distance UCVA 20/20 or better and near UCVA J3 or better. The average keratometry remained stable at 45.09 D 3 years postoperatively compared to 45.08 D 1 year postoperatively.


CONCLUSIONS
Conductive keratoplasty for the treatment of presbyopia provided safe, effective, predictable, and stable results 3 years following the initial surgery. Refractive stability was similar for both the CK-treated and untreated eyes with a small hyperopic shift noted during the 3-year follow-up period.
Stahl
Jason E
JE
Durrie Vision, Overland Park, KS, USA. jstahl@durrievision.com
D000869:Anterior Eye Segment; D003315:Cornea / Q000473:pathology; D019781:Corneal Topography; D016039:Corneal Transplantation / Q000009:adverse effects; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D011184:Postoperative Period; D011237:Predictive Value of Tests; D011305:Presbyopia / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D011446:Prospective Studies; D012029:Refraction, Ocular; D041623:Tomography, Optical Coherence; D016896:Treatment Outcome; D014792:Visual Acuity