Ophthalmology Poster Session



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Association of Dysversion of the Optic Disc with Presumed Amblyopia

Howland, H.C. (Section of Neurobiology and Behavior, Cornell University, USA.)

Contact Person: Howard C. Howland (hch2@cornell.edu)


Dysversion of the optic disc, sometimes referred to as 'situs inversus', is considered to be a congenital malformation of the optic disc wherein most commonly the blood vessels emerge 'towards the temporal rather than towards the nasal side' (Duke-Elder WS (1964)). I examined 45 subjects, with a scanning laser ophthalmoscope looking for the presence or absence of dysversion. Ninteen of these subjects were normal, and 26 were suspected to have amblyopia (of which 9 were actually amblyopic). The rate of disc dysversion in the amblyopic population was significantly higher than that of the non amblyopic population (7 of 9 vs 4 of 36, p < 0.0036). The fact that dysversion appears to be a sign of very early embryonic difficulties and that it is highly and significantly associated with presumed amblyopia may have strong implications both for the detection and treatment of amblyopia. These findings confirm those of Lempert P, Porter L (In Press) Dysversion of the Optic Disc and axial Length Measurements in a Presumed Amblyopic Population. Journal of AAPOS.

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Poster Number PAhowland0622
Keywords: Optic disc, Dysversion, Amblyopia

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Howland, H.C.; (1998). Association of Dysversion of the Optic Disc with Presumed Amblyopia. Presented at INABIS '98 - 5th Internet World Congress on Biomedical Sciences at McMaster University, Canada, Dec 7-16th. Available at URL http://www.mcmaster.ca/inabis98/ophthalmology/howland0622/index.html
© 1998 Author(s) Hold Copyright