"I think that myopia is caused more by genetics that environmental factors."
"I think that whether someone develops myopia is determined more by genetic factors than environmental factors."
"I think that myopia is caused more by genetics that environmental factors."
"I think that ~" 「〜と思う」
"myopia" 「近視は」
"is caused more by ~ than 〇〇" 「〇〇よりも〜によって発症する」
"genetics" 「遺伝的」・「遺伝的要因」"genetic factors" も言えます。
"environmental factors”「環境的要因」
"I think that whether someone develops myopia is determined more by genetic factors than environmental factors."
"whether someone develops ~" 「〜発症するかどうか」
"is determined by ~" 「〜で決まっている」・「〜によって」
[近視は環境的要因](https://eikaiwa.dmm.com/uknow/questions/105789/)についてもっと詳しく知りたい方はクリックしてください」