Đặc điểm đường cong lệch tiêu của một số loại thể thủy tinh nhân tạo

Abstract

Objective: To assess the good vision range of patients after phaco surgery by using the defocus curve. Patient and method: The study was conducted on 99 eyes of 62 patients who had undergone intraocular lens implantation surgery at Tam Anh General Hospital, including 28 males and 34 females, with an average age of 67.89 (± 23.11) years. The types of intraocular lenses surveyed included: SN60WF (n = 28), DFT15 (n = 19), ICB00 (n = 18), ATLISA 809MP (n = 17), ATLISA TRI 839MP (n = 17). The defocus curve was measured for each eye, collected in the range from -3.50D to +2.00D with 0.5D increments. The maximum corrected visual acuity was measured using the EDTRS chart at a distance of 3.12 meters. Result: Considering visual acuity better than 0.2 logMar, the defocus curve of the SN60WF has the best visual acuity range from -0.50D to 0.50D, corresponding to distance vision, and as it moves toward intermediate and near, visual acuity decreases sharply. The defocus curve of the ICB00 has the best visual acuity range from -0.75D to 0.75D, corresponding to distance vision slightly extended to intermediate, but decreases sharply at near. The defocus curve of the DFT15 has the best visual acuity range from -1,750D to 0.50D, corresponding to distance vision extending toward intermediate. The defocus curve of the ATLISA 809MP two-phase has two best visual acuity ranges at -3.50D and from -1.00D to 0.60D, while the defocus curve of the ATLISA TRI 839MP two-phase has the best visual acuity range from -3.50D to -2.50D and from -1.75 to 0.75D, corresponding to a vision range from near to far. Conclusion: Defocus curve assessment is used to define the range of vision at different distances and serves as a valuable tool for differentiating the visual performance of each intraocular lens.