Just to reassure you, Eye problems and candida are very common. Specifically, light flashes are due to weakness in the retina. That's the mirror in the back of the eye... Bad night vision and lingering light when eyes closed and sensitivity to light are all Vit A deficiency. You can also support the eyes with herbs specifically for eyes.
If you are really worried about the flashes of light, you might want to have an opthamologist look at the back of your eyes. At least you can be reassured there is nothing serious. But more than likely all your symptoms sound like a Vit A deficiency. Can also be too much Vit A. The symptoms of overdose are the same as the deficiency symptoms. obj