The invention relates to a trial frame for determining the subjective refraction of a subject, comprising two lens holder devices for receiving insert lenses, a bridge, which connects the lens holder devices in such a manner that their distance relative to each other is adjustable, a nose rest device having a pivotable and height-adjustable nose rest and two temples, which are adjustable in length and height, the nose rest device having an adjustment gear for adjusting the height of the nose rest, the adjustment gear having a toothed rack and a bevel worm wheel, which are engaged with each other.
