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Double-pass optical analysis could aid in selecting cataract patients for surgery
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STOCKHOLM, Sweden — A double-pass optical analysis system objectively evaluates the intraocular quality of eyes for different grades of cataract, a physician said here.
Jose Ruiz-Colecha, MD, presented a study at the European Society of Cataract and Refractive Surgeons meeting that he and colleagues conducted on 34 eyes of 24 patients. These patients were divided into three groups according to the Lens Opacity Clarification System III: Group 1 included 12 eyes with NO1NC1 lens opacification grade; group 2 included 12 eyes with NO2NC2 grade; and group 3 included 10 eyes with NO3NC3 grade.
Intraocular quality was measured with VOL-CT software (Saver and Associates). The modulation transfer function was measured by a double-pass method, the OQAS (Visiometrics).
The researchers found that there was an increase in lens density according to cataract grade, with statistically significant differences between group 3 and group 1, and between group 3 and group 2.
"An objective method to characterize the early to moderate grades of cataract is shown in this study," Dr. Ruiz-Colecha said. "This method may help us to make a better choice in the future about the best moment to perform cataract surgery in eyes with low-grade cataracts."