Please assess the completion status of the following clinical trial:

Trial Title: Methylphenidate Effect on Humphrey Visual Fields

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: SINGLE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* abnormal visual fields~* must be able to swallow pills~Exclusion Criteria:~* psychiatric disorder~* dementia~* ocular disorder which is known to cause abnormal visual fields~* prescription of psychoactive medications~* visual acuity lower than 20/100~* cardiac arrhythmia~* hypersensitivity to methylphenidate~* prescription of warfarin

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 120 Years
- Healthy Volunteers: f

Study Arms:
- methylphenidate provided (Type: EXPERIMENTAL): the study group will be given a single pill containing methylphenidate 10mg to be taken 2 hours before their visual field test
- control (Type: ACTIVE_COMPARATOR): control group will not be given any placebo and will perform a repeat visual field testing without any prior preparation

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