The artificial intraocular lens imaging measuring instrument has a wide range of applications in ophthalmic clinical practice. Here are some practical cases:
Case 1: Preoperative measurement of a patient with posterior polar cataract: A 64 year old female patient was diagnosed with posterior polar cataract in both eyes, with severe posterior lens opacity in the right eye and inability to see through the eye. Using the IOLMaster 700 visual scanning biometric instrument for measurement, although the patient's lens is severely cloudy and blocks the measurement light source, and the fixation confirmation image shows no fundus tissue, the IOLMaster 700 can analyze the ocular structure through the full range OCT images obtained from six directions. On the quality inspection interface, it can be seen that the posterior lens is extremely cloudy, and the continuity of the posterior capsule is interrupted, indicating a rupture of the posterior capsule. Finally, the patient underwent Phaco+IOL implantation in the right eye, preparing for vitrectomy. During the surgery, the patient underwent cardiac ultrasound, posterior capsule tear, anterior segment vitrectomy, and implantation of a three piece artificial lens into the ciliary sulcus. The postoperative visual acuity of the right eye reached 0.6, and the effect was good.
Case 2: Measurement of a patient with artificial lens dislocation: Four months after cataract surgery, a patient's vision decreased for four days after right eye collision, diagnosed with right eye artificial lens dislocation, and planned to undergo right eye IOL removal+artificial lens suspension surgery, followed by preoperative biometric measurement again. The measurement parameters were successfully obtained using IOLMaster 700, and through the visualization of the entire process from the corneal vertex to the retinal fixation point, it was intuitively seen that the measurement axis passed through the optical zone of the artificial lens. Therefore, when calculating the degree of the artificial lens, the patient's eye was treated as an "artificial lens eye", providing accurate measurement basis for surgery. After surgery, the IOL position was correct, and the corrected visual acuity of the right eye was improved to 0.5.
Case 3: Measurement of cataract patients after posterior chamber intraocular lens implantation in eyes with crystalline lenses: The study included 8 cases (12 eyes) of cataract patients after posterior chamber intraocular lens implantation in eyes with crystalline lenses, who were measured using the intraocular lens measuring device IOLMASTER500. Among them, 8 monocular lenses were treated with a two-step surgical method. Before the ICL lens was removed, the Master was used to measure the lens. If the eye axis could not be measured, A-scan measurement was used. After the ICL lens was removed during surgery, the lens was measured again, the lens power was calculated, and the appropriate brand and model were selected. The second surgery included cataract phacoemulsification surgery and artificial lens implantation; Four binocular surgeries were performed using synchronous surgical methods, with direct measurement and calculation of lens power before surgery and selection of suitable brands and models. ICL lens extraction surgery and cataract surgery were performed simultaneously. The results showed that both the two-step surgery group and the synchronous surgery group had ideal postoperative refractive status and visual acuity, proving the effectiveness of the artificial lens imaging measurement instrument in measuring complex cases of this kind.