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→Vertex distance: It would also imply that with contact lenses the severity of aniseikonia would be much reduced, but not strictly zero. |
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== Vertex distance ==
This [https://chadwickoptical.com/aniseikonia-calculator/ online calculator] indicates that the distance used in the formula should be defined as that from the ''pupil'' to the back of the spectacle lens, rather than the ''cornea''. It seems reasonable to me. If so, then the definition of ''h'' in the current WP article is not quite right.
It would also imply that with contact lenses the severity of aniseikonia would be much reduced, but not strictly zero. —DIV ([[Special:Contributions/1.129.106.159|1.129.106.159]] ([[User talk:1.129.106.159|talk]]) 11: | |||