The present invention relates to a periscopic device (3) for examining an eye of a person having an inwardly squinting eye (esotropia). The periscopic device (3) comprises a tube (4), a first mirror (5) arranged inside the first end (6) of the tube (4), and a second mirror (7) arranged inside the second end (8) of the tube (4). In one embodiment of the invention, the first and the second mirrors (5,7) are arranged so that when the person looks through the periscopic device (3) with the inwardly squinting eye (2) while the other eye (1) is being examined, the first and the second mirrors (5,7) (10,11) each deflects the line of sight of the person by an angle of approximately 90°. The periscopic device (3) further comprises a base out prism (9) arranged in front of the first mirror (5) so that, during use of the periscopic device (3), the line of sight of the inwardly squinting eye (2) is deflected towards the first mirror (5). In another embodiment of the invention, the first and the second mirrors (5,7) are arranged non-parallel to each other, and the first mirror (5) is arranged so that when the person looks through the periscopic device (3) with the inwardly squinting eye (2) while the other eye (1) is being examined, the line of sight of the inwardly squinting eye (2) is reflected in the first mirror (5) and towards the second mirror (7).La présente invention concerne un dispositif périscopique (3) pour examiner un œil d'une personne ayant un strabisme convergent (ésotropie). Le dispositif périscopique (3) comprend un tube (4), un premier miroir (5) disposé à l'intérieur de la première extrémité (6) du tube (4), et un second miroir (7) disposé à l'intérieur de la seconde extrémité (8) du tube (4). Dans un mode de réalisation de l'invention, les premier et second miroirs (5,7) sont agencés de telle sorte que, lorsque la personne regarde à travers le dispositif périscopique (3) avec l'œil ayant un strabisme convergent (2) tandis que l'autre œil (1) est examiné, les
