 Others, such as professor of physics Auguste Meessen, suggest that optical effects created by the human eye can account for the reported phenomenon.Meessen presented his analysis of apparitions and "Miracles of the Sun" at the International Symposium "Science, Religion and Conscience" in 2003.While Meessen felt those who claim to have experienced miracles were "honestly experiencing what they report", he stated Sun miracles cannot be taken at face value and that the reported observations were optical effects caused by prolonged staring at the Sun.