With this device, used in offices of occupational medicine, we can check a number of parameters of the vision:
- visual acuity – is acuteness or clearness of vision, which is dependent on the sharpness of the retinal focus within the eye and the sensitivity of the interpretative faculty of the brain
- perception of light
- visual field – the area simultaneously visible to one eye without movement
- color sense – the faculty by which colors are perceived and distinguished
- orthophoria – The normal condition of balance between the muscles of the eyes that permits the lines of sight to meet at an object being looked at.