My husband took me to our car and I sat down and after some time everything was good again . Another time I was sitting in class it was a hot day and everything around me was becoming dark . I put my head down on my desk and then my vision came back .
What may be the reason for them losing their vision ?
Pick the best answer from the following options:
- They passed out from low blood sugar .
 - They were in an accident .
 - They are dehydrated from the heat .
 - They have a form of genetic blindness .


They are dehydrated from the heat .