Four-hole lamp

The utility model relates to a lamp for detecting visual functions of eyes, in particular to a four-hole lamp used for detecting binocular single vision function. The four-hole lamp is characterized in that round holes are formed in the surface of a casing, and lenses are connected into the round holes. When the four-hole lamp is used for examination, the four-hole lamp provides the binocular visions by means of mutual concealment due to mutual complementation, so as to achieve the purpose of examining the binocular single vision function; and the four-hole lamp plays an important role in determining a dominant eye and determining anisometropia. The four-hole lamp has a simple structure, is convenient to use, has a lower price, is convenient to be understood, and is particularly suitable for the examination in infants. The colored lenses are made of glass instead of plastics, which can not only increases the technical level, ensure good color effect and prevent color fading but also provide convenience for cl