Please assess the completion status of the following clinical trial:

Trial Title: Diagnosis of ON With or Without MS or NMOSD

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: CASE_CONTROL
- Primary Purpose: None
- Time Perspective: OTHER
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~1. Male or female patients ages 18-90 years~2. Signed informed consent~3. Have been diagnosed with optic neuritis (ON) only, MS and ON, or NMOSD and ON~4. Have had at least one previous test to track optical nerve function~Exclusion Criteria:~1. Are pregnant or nursing~2. Are children (age \<18 years)~3. Do not have a diagnosis of optic neuritis (ON)~4. Have a diagnosis of MS or NMOSD without a diagnosis of ON as well

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 90 Years
- Healthy Volunteers: f

Study Arms:
- Optic neuritis diagnosis only (Type: None): Patients who have a diagnosis of optic neuritis, without a diagnosis of MS or NMOSD.
- ON and multiple sclerosis (Type: None): Patients who have a diagnosis of optic neuritis AND multiple sclerosis.
- ON and NMOSD (Type: None): Patients who have a diagnosis of optic neuritis and neuromyelitis optica spectrum disorder.

Based on this trial design, predict the completion outcome and termination type (if applicable).