With the Bagolini striated glasses you test binocular cooperation without disturbing the image: the fine striations in the glass turn a point of light into a line of light, while the person keeps looking through the glass as normal.
Because the image is hardly influenced, you see the natural eye position: you check whether there is normal binocular cooperation, suppression or double vision. A simple test that is quick to carry out in any practice.
Which orthoptic instrument measures what? Read our guide: Orthoptic instruments: what each one measures.
