Hi. My mom has experienced several episodes of memory loss. The process starts with watery eyes, followed by inability to see (vision gets blurry or she sees black and white lines), followed by a short memory loss (she can't recall names of certain people, or certain events). All of this lasts for about 30-60 minutes and then she is back to normal, fully functioning. My mom is 55 years old, eats very healthy (macrobiotic diet where everything is organic), and takes no medication. What could it be?