Trial frame
trial frame n.
An adjustable frame that holds trial lenses used during retinoscopy or refraction tests on the eye.
Read Also:
- Trial-horse
noun, Informal. 1. an opponent who performs against a superior foe in a workout or exhibition.
- Trial-jury
noun 1. petty jury.
- Trial-lawyer
noun 1. a lawyer who specializes in appearing before trial courts.
- Trial lens
trial lens n. Any of a set of cylindrical and spherical lenses used in testing vision.
- Triallist
noun 1. a person who takes part in a competition, esp a motorcycle trial 2. (sport) a person who takes part in a preliminary match or heat held to determine selection for an event, a team, etc