Abstract | PURPOSE: To determine if aniseikonia appears on the Hess [Screen] Chart and if it can be measured thereby; and to compare such measurement to the standard Awaya New Aniseikonia Test in both artificial and pathologic aniseikonia. SUBJECTS AND METHODS: Twenty normal subjects with 20% artificial induced aniseikonia (Group 1) and 21 patients with pathologic aniseikonia (Group 2) were examined with the New Aniseikonia Test ( NAT) and the Hess Chart. Group 2 was divided into three subgroups: Group 2-1, 13 patients with aphakia, whose operated eyes were more hypermetropic that their better eyes; Group 2-2, 3 patients with myopic anisometropia more than 5 diopters; and Group 2-3, 5 patients who had received macular translocation surgery (MTS). RESULTS: In normals, measurement of the 20% artificial aniseikonia ranged from 10% to 21% (mean 15%) using the NAT, and from 16% to 39% (mean 27.1% vertically and 24.6% horizontally) using the Hess Chart. In the 21 patients with pathologic aniseikonia, the NAT measurements ranged from 0% to 24% (upper limit of the NAT) and the Hess Chart measurements ranged from 0% to 65%. A large amount of the aniseikonia that appeared on the Hess Chart disappeared or was significantly reduced by changing the spectacle correction to a contact lens or intraocular lens. CONCLUSION:
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Authors | Toshie Hirai, Miho Sato, Chang-Hua Piao, Sampei Miyake, Hiroko Terasaki, Wataru Ohyagi, Yozo Miyake |
Journal | Binocular vision & strabismus quarterly
(Binocul Vis Strabismus Q)
Vol. 19
Issue 4
Pg. 234-45
( 2004)
ISSN: 1088-6281 [Print] United States |
PMID | 15530140
(Publication Type: Journal Article)
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Topics |
- Adolescent
- Adult
- Aged
- Aniseikonia
(diagnosis)
- Humans
- Middle Aged
- Vision Tests
(instrumentation, methods)
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