Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
optixNM_0799567227opt    Six3    Dsix3    D-Six3    CG18455   
optixNM_1655847227opt    Six3    Dsix3    D-Six3    CG18455   
optixNT_0337787227opt    Six3    Dsix3    D-Six3    CG18455   
OptixAF0501327227
OptixAY0610777227
OptixBT0038027227
OptixAE0038397227

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002