White Shark...vitamin A mega dose

I know that my body wasn't absorbing vitamin A. When I found this out, I consulted with a nutritionist. I decided not to take the 10,000 mg of vitamin A per day because I didn't know if my body would absorb it anyway and high dose could cause toxicity. What dosage would be considered a mega dose that this boy received? I wonder if he was prescribed a high dosage taken at home or what type of doctor presribes it. I would love to take a higher dosage of vitamin A just one time if possible, but I need to know what type of doctor is experienced with this since as the article states, most doctors assume vitamin A deficiency is rare in the US. But it's not. Although I was able to see ok, I have experienced night blindness while driving at night.

http://www.newsweek.com/boy-goes-blind-eating-meat-potatoes-cereal-eczema-treatment-diet-677678?yptr=yahoo

"Doctors explained that the young boy suffered from eczema triggered by food, which was the reason for his nutrient-poor diet. Foods rich in vitamin A include carrots, sweet potatoes, dark leafy greens, fish and liver." Tweet