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Biometry after intrastromal laser vision correction proves viable
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 Tanja M. Rabsilber |
BOSTON — IOL power calculations after intrastromal laser vision correction proved safe and reliable, a speaker said here.
Tanja M. Rabsilber, MD, presented results of IOL power calculations using the IOLMaster (Carl Zeiss Meditec) after the IntraCor femtosecond laser procedure for presbyopia (Technolas Perfect Vision).
"IOLMaster biometry after the IntraCor procedure seems to be reliable, so at the moment we feel that we don't have to adjust our procedure," Dr. Rabsilber said at the American Society of Cataract and Refractive Surgery meeting.
The prospective study included 25 eyes of 25 presbyopic patients who underwent the IntraCor procedure. Patients underwent biometric evaluation before surgery and 12 months postoperatively. Keratometry values were compared with those obtained via the clinical history method.
"In the course of the trial, the question arose, 'What if the patient needs cataract surgery later on? Do we have to expect refractive surprises? Do we need to consider any further correction factors?'" Dr. Rabsilber said.
Results showed a statistically significant myopic shift of –0.4 D. A comparison of preoperative and 12-month postoperative keratometry values showed no significant differences in axial length or anterior chamber depth.
Results also showed accurate IOL power calculations despite a slight trend toward overestimation, Dr. Rabsilber said.
Further study is needed to explore biometric readings performed after the IntraCor procedure, she said.
"This is still a theoretical approach, so further clinical prospective analysis will be necessary, and it will be interesting to see how it compares to our results," Dr. Rabsilber said.
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