York Teaching Hospital NHS Foundation Trust, York, UK.
Eye (Lond). 2011 Oct;25(10):1333-6. doi: 10.1038/eye.2011.169. Epub 2011 Jul 22.
To demonstrate a quick way of calculating the optical difference between two refractions using vector analysis, and to express this as a score for examination purposes.
An existing formula is applied, converted to a defocus equivalent, and then converted to a score. The formula is set out in an Excel spreadsheet.
The spreadsheet enabled rapid assessment of the difference between two refractive errors. Examples are demonstrated.
The spreadsheet was successful in enabling a comparison of any two refractions, expressing the difference either as a correcting (third) refraction, a defocus equivalent or a one-figure score.
展示一种使用向量分析快速计算两种屈光度之间光学差异的方法，并将其表示为考试分数。
应用现有公式，转换为散焦等效值，然后转换为分数。该公式在 Excel 电子表格中列出。
电子表格可快速评估两种屈光不正之间的差异。举例说明。
电子表格成功地实现了对任何两种折射的比较，以矫正（第三）折射、散焦等效值或一位数分数的形式表示差异。
