Harris W F, Rubin A
Optometric Science Research Group, Department of Optometry, University of Johannesburg, Johannesburg, South Africa.
Optom Vis Sci. 2005 Jul;82(7):633-6. doi: 10.1097/01.opx.0000171353.54199.43.
: The purpose of this article is to analyze the geometry and examine the implications of the error cells of purely spherical powers in symmetric dioptric power space.
: In the context of spherocylindrical data spherical data typically implies a cylindrical component that is less than some particular amount (often 0.125 D) in magnitude. This error or uncertainty in cylinder is over and above the error in sphere itself. The two components of error are used to define the error cells in symmetric dioptric power space.
: Error cells of spherical powers are constructed and presented as stereopairs. They are also shown in relation to error cells of powers in general.
: An understanding of error cells can help the researcher avoid pitfalls in the analysis of spherocylindrical data. Perhaps surprisingly, the error cells of spherical powers are not invariant under spherocylindrical transposition.
本文旨在分析对称屈光力空间中纯球镜度的几何形状，并探讨误差单元的影响。
在球柱镜数据的背景下，球镜数据通常意味着柱镜分量的绝对值小于某个特定值（通常为0.125D）。柱镜的这种误差或不确定性是在球镜本身误差之上的。这两个误差分量用于定义对称屈光力空间中的误差单元。
构建了球镜度的误差单元并以立体对的形式呈现。它们也与一般屈光力的误差单元相关展示。
了解误差单元有助于研究人员避免在分析球柱镜数据时出现陷阱。也许令人惊讶的是，球镜度的误差单元在球柱镜转换下并非不变。
