准分子激光原位角膜磨镶术后使用角膜地形图进行人工晶状体屈光力计算。
Intraocular lens power calculations using corneal topography after photorefractive keratectomy.
作者信息
Ladas J G, Boxer Wachler B S, Hunkeler J D, Durrie D S
机构信息
Jules Stein Eye Institute, Department of Ophthalmology, University of California, Los Angeles, 90095, USA.
出版信息
Am J Ophthalmol. 2001 Aug;132(2):254-5. doi: 10.1016/s0002-9394(01)00894-7.
PURPOSE
To report two patients (two eyes) with previous photorefractive keratectomy, who subsequently underwent cataract extraction years later.
DESIGN
Case reports.
METHODS
Corneal topography was used to determine corneal power used in intraocular lens power calculations.
RESULTS
In two eyes of two patients, intraocular lens calculations after photorefractive keratectomy were inadequate, which resulted in a hyperopic postoperative refractive error requiring implantation of a piggyback intraocular lens.
CONCLUSION
Corneal topography to determine corneal power in patients with previous photorefractive keratectomy may result in unpredictable intraocular lens power calculations. The clinical history method is the standard to determine corneal power and should be considered in intraocular lens calculations before cataract surgery. We recommend supplying refractive patients with preoperative data for use in future formulas for intraocular lens selection.
目的
报告2例曾接受过准分子激光原位角膜磨镶术（PRK）的患者（2只眼），其在数年后接受了白内障摘除术。
设计
病例报告。
方法
使用角膜地形图来确定用于人工晶状体屈光度计算的角膜屈光力。
结果
2例患者的2只眼中，准分子激光原位角膜磨镶术后的人工晶状体计算不准确，导致术后远视性屈光不正，需要植入背负式人工晶状体。
结论
对于曾接受过准分子激光原位角膜磨镶术的患者，使用角膜地形图来确定角膜屈光力可能会导致人工晶状体屈光度计算不可预测。临床病史法是确定角膜屈光力的标准方法，在白内障手术前进行人工晶状体计算时应予以考虑。我们建议为屈光不正患者提供术前数据，以供将来选择人工晶状体的公式使用。
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