A 16-year-old type 1 diabetic female patient was consulted to our clinic for acute bilateral painless vision loss with a 2-week history in the right eye and a 1-week history in the left eye. At the initial visit, the best-corrected visual acuity was 0.2 in the right eye and 0.05 in the left eye. In fundus examination, both optic disks were pale and slightly swollen. In both eyes, superficial telangiectatic vessels were extending from the optic disk to the retina. Telangiectatic vessels disappeared within 10 days with systemic hypertension regulation and without any ocular treatment.