19 years ago I was shocked when after a conference I had difficulty in seeing what was around me. One person that attended the conference had to take me home and the next day I had to go to a ophthalmologist. The final diagnosis was myopia. I never noticed and the doctor believed that what caused it to show up so quickly was the exposure to a slide show on the wall during the conference. The light and brightness were the trigger to my myopia to make its appearance, of …