Arrangement for determining refractive power and/or other visual functions

摘要

The arrangement includes at least one light source in series with a light modulator controlled by a control unit (25) to modulate video information. A two dimensional deflection system for the light is provided to produce an image. The light from the light source is transmitted optically and a projection system projects the image on to the retina (27). The arrangement can have means of detecting the direction of vision of a patient and of aligning the image. The light source can be a laser and the light beam can be transmitted using a flexible optical fibre