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白內障超音波乳化術併人工水晶體植入手術後眼壓及前房深度之變化
Changes in IOP and ACD after Cataract Surgery and PCIOL Implantation
摘要
Purpose: To examine the changes in intraocular pressure (IOP) and anterior chamber depth (ACD) after clear cornea phacoemulsification and posterior chamber intraocular lens (PCIOL) implantation in eyes with no previous history of glaucoma or ocular hypertension. Methods: The IOPs and ACDs of 72 eyes were prospectively evaluated before and after phacoemulsification and PCIOL implantation. The IOPs were measured using pneumatic tonometry prior to the surgery. The ACDs, lens thickness and axial length were measured using ultrasonography (A-scan) (SONOMED). All eyes underwent clear corneal phacoemulsification and silicone foldable intraocular lens implantation within the capsular bag. Surgery was performed by one surgeon (HCC). Postoperatively, patients were reexamined after the cessation of steroid eye drops for at least 2 weeks. Results: The mean preoperative IOP was 13.78±2.91mmHg. After an average of 50.68 days (range 27 to 90 days), the average postoperative IOP dropped significantly to 11.08±2.83mmHg (p＜0.001). Preoperatively, the mean ACD was 3.07±0.43mm, the mean lens thickness was 4.14±0.64mm, and the mean axial length was 24.25±1.72mm. Post-operatively, the average ACD increased significantly to 3.98±0.42mm (p＜0.001). The preoperative ACD, lens thickness and axial length were found not to be related to the lowering of IOP. The correlation between the change of ACD and the change of IOP were positive (p=0.038), the correlation between the lens thickness and the change of ACD were positive (p=0.002), the correlation between the preoperative ACD and the change of ACD were negative (p＜0.001), and the correlation between the preoperative IOP and the change of IOP were positive (p=0.001). Conclusion: After phacoemulsification and PCTOL implantation, a significant decrease in the IOP and a significant increase in the ACD were noted. The more rises there is in the ACD, the greater the drop there is in the IOP. The eyes with shallower preoperative ACDs and thicker preoperative lenses were found to have significantly more differences between the pre- and post-operative ACDs. Furthermore, the eyes with higher preoperative IOP were found to have significantly more differences between the pre- and post-operative IOPs. These results suggest that phacoemulsification and PCIOL implantation may have a considerable effect in lowering IOP in patient who undergoes cataract surgery.
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無資料並列摘要
Purpose: To examine the changes in intraocular pressure (IOP) and anterior chamber depth (ACD) after clear cornea phacoemulsification and posterior chamber intraocular lens (PCIOL) implantation in eyes with no previous history of glaucoma or ocular hypertension. Methods: The IOPs and ACDs of 72 eyes were prospectively evaluated before and after phacoemulsification and PCIOL implantation. The IOPs were measured using pneumatic tonometry prior to the surgery. The ACDs, lens thickness and axial length were measured using ultrasonography (A-scan) (SONOMED). All eyes underwent clear corneal phacoemulsification and silicone foldable intraocular lens implantation within the capsular bag. Surgery was performed by one surgeon (HCC). Postoperatively, patients were reexamined after the cessation of steroid eye drops for at least 2 weeks. Results: The mean preoperative IOP was 13.78±2.91mmHg. After an average of 50.68 days (range 27 to 90 days), the average postoperative IOP dropped significantly to 11.08±2.83mmHg (p＜0.001). Preoperatively, the mean ACD was 3.07±0.43mm, the mean lens thickness was 4.14±0.64mm, and the mean axial length was 24.25±1.72mm. Post-operatively, the average ACD increased significantly to 3.98±0.42mm (p＜0.001). The preoperative ACD, lens thickness and axial length were found not to be related to the lowering of IOP. The correlation between the change of ACD and the change of IOP were positive (p=0.038), the correlation between the lens thickness and the change of ACD were positive (p=0.002), the correlation between the preoperative ACD and the change of ACD were negative (p＜0.001), and the correlation between the preoperative IOP and the change of IOP were positive (p=0.001). Conclusion: After phacoemulsification and PCTOL implantation, a significant decrease in the IOP and a significant increase in the ACD were noted. The more rises there is in the ACD, the greater the drop there is in the IOP. The eyes with shallower preoperative ACDs and thicker preoperative lenses were found to have significantly more differences between the pre- and post-operative ACDs. Furthermore, the eyes with higher preoperative IOP were found to have significantly more differences between the pre- and post-operative IOPs. These results suggest that phacoemulsification and PCIOL implantation may have a considerable effect in lowering IOP in patient who undergoes cataract surgery.