Olsen T
Department of Ophthalmology, University of Aarhus, Aarhus Kommunehospital, Denmark.
Br J Ophthalmol. 1988 Mar;72(3):231-5. doi: 10.1136/bjo.72.3.231.
The pre- and postoperative refraction results are reported in 99 patients receiving an anterior chamber lens of standard 19.0 D power after intracapsular cataract extraction. The mean refraction after the operation was -0.76 D, SD 2.13. Apart from eight patients with suspected lenticular myopia, 5% of the patients ended up with a refraction that differed more than +/- 5D from the preoperative value. This variation was due to variation in the power of the biological lens removed at surgery, the mean value of which was 22.8 D, SD 3.3. As a measure of the aniseikonia induced at surgery, the ocular magnification was calculated to increase 2.7%, SD 4.2%, as compared with the preoperative value. The variation should be considered in the discussion of whether a preoperative biometry and calculation of appropriate IOL power are recommended or not.
报告了99例在囊内白内障摘除术后植入标准19.0 D屈光度前房型人工晶状体患者的术前和术后屈光结果。术后平均屈光度为-0.76 D，标准差为2.13。除8例疑似晶状体性近视患者外，5%的患者术后屈光度与术前值相差超过±5 D。这种差异是由于手术中摘除的生物晶状体屈光度存在差异，其平均值为22.8 D，标准差为3.3。作为手术中诱发的像不等的一种衡量指标，与术前值相比，眼放大率计算得出增加了2.7%，标准差为4.2%。在讨论是否推荐术前生物测量和计算合适的人工晶状体屈光度时，应考虑这种差异。
