Temporary blindness and marijuana?

Let's say you've smoked before and never had trouble with the source before. Dehydration? Getting over a cold? Coming down with a bug? Bonked in the head? Hadn't eaten in a while? The occurrence, feeling better, re-occurrence and feeling better does not sound like laced weed. Don't be afraid to tell your mom what happened, leaving out the weed part, and see how you feel. Don't blame you for being alarmed. Stop smoking for a while to rule it out.