"I thought feeling dazzled by bright lights was due to my physical make up and not a sickness."
"I thought was in my nature, not a disease that made me feel dazzled by bright lights."
"I thought feeling dazzled by bright lights was due to my physical make up and not a sickness."
"I thought ~" 「〜と思っていた」
"feeling dazzled by bright lights" 「光が眩しく感じるの」
"due to ~" 「〜による」・「〜だ」
"my physical make up"「体質」
"not a sickness" 「病気ではなくて」
"I thought was in my nature, not a disease that made me feel dazzled by bright lights."
"in my nature" 「わたしの体質だ」
"not a disease" 「病気ではなくて」
[体質](https://eikaiwa.dmm.com/uknow/questions/6279/) についてもっと詳しく知りたい人はクリックしてください。