Graphical construction of cardinal points from the transference
African Vision and Eye Health
| Field | Value | |
| Title | Graphical construction of cardinal points from the transference | |
| Creator | Harris, W. F. | |
| Description | Usually nodal, principal and focal points are defined independently and thought of as distinct structures with no simple relationship among them. By adopting a holistic approach, in which these threetypes of cardinal points are treated as particular cases of a larger class of special points, this paper develops a method of constructing the locations of the cardinal points of a system graphically directly from the transference. The method provides a useful way of visualising the relationship of the locations of the cardinal points and of how they are affected by changes in the system or when a second optical system is placed in front of the first. Thepaper illustrates the graphical procedure by apply-ing it in several situations of interest in optometryand ophthalmology, including the effect of a contact lens or refractive surgery on a reduced eye and the effect of accommodation, a spectacle lens and an afocal telescope on the Gullstrand-Emsleyschematic eye. (S Afr Optom 2011 70(1) 3-13) | |
| Publisher | AOSIS | |
| Date | 2011-12-10 | |
| Identifier | 10.4102/aveh.v70i1.88 | |
| Source | African Vision and Eye Health; South African Optometrist: Vol 70, No 1 (2011); 3-13 2410-1516 2413-3183 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://avehjournal.org/index.php/aveh/article/view/88/58
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