Abstract
Confidence regions for mean dioptric power can be represented by ellipsoids in a three-dimensional space called h-space. A convenient graphical representation is provided by stereo-pair drawings that, at a glance, show the estimated accuracy with which the mean power is known. As an example, a sample of autorefractor measurements made on one eye were used to construct a 95% confidence ellipsoid for the mean objective refractive status of that eye. Key dimensions of the ellipsoid are compared with those of another eye. The analysis is of fundamental importance for scientific studies of variation and change of refractive status. Its potential clinical importance is also discussed.
Original language | English |
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Pages (from-to) | 950-953 |
Number of pages | 4 |
Journal | Optometry and Vision Science |
Volume | 68 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 1991 |
Keywords
- Confidence regions
- Mean dioptric power
- Statistics of refractive error
- Variance of dioptric power
ASJC Scopus subject areas
- Ophthalmology
- Optometry