Hi Dear, Welcome to HCM. Understanding your concern. As per your query you have acne on face due to optic neuritis medicines which is very common as it increases your skin sensitivity. I would suggest you to use face wash containing salicylic acid twice a day and apply cream containing azelaic acid which is natural extract and safe for use . The treatment you are opting like washing your face with tea tree oil is very right. Exfoliate your skin once in a week to remove the dead skin. Apply Adapelene gel once at night. You should apply Meladerm cream and it is purely safe to use as this is combination of hydroquinone + Tretinoin + steroid and apply it at night time. If condition doesn t get better in a month then consult dermatologist again for proper diagnosis and to rule out any underlying condition . Doctor may prescribe isoteritenoin , steroid ointment or antibiotics course. Take Multivitamin supplements. Hope your concern has been resolved. Best Wishes, Dr. Harry Maheshwari