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Of 60 attacks of ocular toxoplasmosis, in 37 (62%) no apparent macular problems were demonstrated on inspection, in seven (12%) active retinitis was evident within 5 degrees of the umbo, and in seven (12%) some evidence was shown of mild macular edema; severe edema, such as cystoid macular edema, was uncommon.
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Schlaegel et al. (1984) studied this question.
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