摘要:
An apparatus for corneal topographic analysis, determining the precise curvature of a cornea and the position of the optical axis giving a map of such curvature to an operator, and also for pupillometric analysis, determining the pupil contour and the relative centre both in steady and dynamic conditions during transients of contraction and dilation, and for a real analysis by fluoresceine by testing a contact lens fitting on a cornea. The apparatus comprises a measuring head (6) having a Placido disc (2) backlighted with a light source (31), suitable for causing the pupil to contract. Coaxial to the disc (2) a videocamera (10) is mounted, comprising an optical unit (11) for focusing on a shot image. The measuring head (6) comprises a plurality of infrared LEDs, for example respectively four LEDs (14,15,16,17), suitable for lighting the eye in a way suitable not to disturb the aperture of the pupil and two visible light LEDs (18,19) arranged on the Placido disc (2) suitable for causing the contraction of the pupil.