Grade 3 Optic Neuritis, CTCAE

**Semantic type:** Finding

**Definition:** Severe or medically significant but not immediately sight-threatening; decrease in visual acuity (best corrected visual acuity worse than 20/40 or more than 3 lines of decreased vision from known baseline, up to 20/200) in the affected eye; oral steroids indicated; limiting self-care ADL or severe impact on age-appropriate normal daily activity (pediatric)

**Synonyms:** - Grade 3 Optic neuritis