Visual Stimulation System to Detect Eye Movements

This paper presents design of a luminous ocular stimulation system to measure ocular movements. The system shows 13 red color stimulus from 0 to ±60° in horizontal, vertical and oblique directions. A main characteristic of the system is that it works with white environment light. When sense the ocular movements it uses photo resistances to record the reflex from the sclera and iris, which is illuminated by a LED ultra shine. To get the correspondent graphic of eyes movements it builds the software CARMO (Captura, Analisis y Registro de Movimientos Oculares) in a visual environment. CARMO obtains the digital signal of the variations from photo resistances. The response magnitude is obtained in an interval from 0 to 5 Vp with a sampling time of 1,6 mS. CARMO storages the information and allows calculate the latencies time.