Gupta Pankaj C, Caty Jane T
University Hospitals Eye Institute, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA.
Curr Opin Ophthalmol. 2018 Jan;29(1):9-13. doi: 10.1097/ICU.0000000000000446.
To evaluate and summarize literature from the past 18 months reporting advancements and issues in astigmatism assessment prior to cataract surgery.
New and updated toric calculators and regression formulas offer the opportunity for more accurate lens selection for our patients. Concurrently, improvements in topographic evaluation of corneal keratometry have allowed for a decrease in unplanned residual corneal astigmatism. Measuring posterior corneal astigmatism is especially valuable in eyes with keratoconus when planning to implant toric intraocular lens (IOL) and now allows access to this patient population.
Improved accuracy of astigmatism evaluation now occurs with point reflections on the corneal surface along with the latest generation toric lens formulas which integrated posterior corneal astigmatism, predicted lens position, and intended spherical power of the IOL. These improvements can allow for incorporation of toric lenses in keratoconus patients.
评估并总结过去18个月中报道的白内障手术前散光评估方面进展及问题的文献。
新型及更新后的散光计算器和回归公式为我们为患者更准确地选择人工晶状体提供了机会。同时，角膜曲率计地形评估的改进使得计划外的残余角膜散光有所减少。在计划植入散光人工晶状体时，测量后角膜散光对于圆锥角膜患者尤为重要，现在也使得这类患者能够接受手术。
如今，随着角膜表面的点反射以及整合了后角膜散光、预测的晶状体位置和人工晶状体预期球镜度数的最新一代散光晶状体公式的出现，散光评估的准确性有所提高。这些改进能够将散光晶状体应用于圆锥角膜患者。
