Please assess the completion status of the following clinical trial:

Trial Title: Studying the Effects of Natural Visual Scene Changes on Typical Adult Visual Perception

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: BASIC_SCIENCE
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* Normal visual acuity~* Capable of giving informed consent~* Fully vaccinated against COVID-19~Exclusion Criteria:~* Known color deficiencies~* Diagnosis of retinal disease or inherited retinal disease from family history~* A psychophysical threshold for horizontal position discrimination that is greater than 0.6 degrees of visual angle (to be determined during the first experimental session)

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: t

Study Arms:
- Healthy participants (Type: EXPERIMENTAL): Participants will be excluded prior to the experiment if their best-corrected visual acuity is worse than 20/40 in either eye or if they make any errors on the Ishihara plate test.~For enrolled participants, their threshold for horizontal position discrimination will be calculated based on their performance on the experimental task during their first session. Participants will be excluded after the conclusion of their first session if their horizontal position discrimination threshold in the control condition is higher than a maximum value of 0.6 degrees of visual angle, and participants excluded at this point will not participate in any further experimental sessions.

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