To the Editor.
—I read with interest the report by Khouri et al1 on X-linked congenital stationary night blindness that was published in the October 1988 Archives. It is interesting that the incomplete type of congenital stationary night blindness, which we have reported previously,2 was also found in the United States.The authors noted that three of the five affected patients in their study pedigree showed ocular findings of the incomplete type. However, in one patient (case IV-2) findings were more consistent with the complete type of congenital stationary night blindness. This result led to the assumption by Khouri et al that the incomplete type may be a variation of the complete type.In case IV-2, the diagnostic basis for the complete type of congenital stationary night blindness was, acccording to Khouri et al, a nonrecordable rod b-wave, absent oscillatory potentials, and high myopia. However, judging from the
Miyake Y. X-linked Congenital Stationary Night Blindness. Arch Ophthalmol. 1989;107(5):635–636. doi:10.1001/archopht.1989.01070010653009