The study examined the dimensions of the ciliary sulcus (the part of the eye where the artificial lens is placed) in 244 myopic patients using ultrasound biomicroscopy. The researchers found that the ciliary sulcus is predominantly vertical in shape (the vertical diameter is larger than the horizontal) and that both dimensions are significantly larger in patients with extreme myopia than in those with moderate or high myopia. Based on data from 72 eyes, they developed a predictive mathematical model that, using the horizontal diameter of the sulcus and the size of the implanted lens (ICL), can predict the position of the lens after surgery with an accuracy of 65.7 percent. The researchers found that larger ICL size was associated with a larger ciliary sulcus. Routine measurement of both sulcus dimensions in combination with a predictive model can help ophthalmologists better select the lens size for each patient individually and increase the safety of surgery.