Since a lot of people are chiming in with anecdotal evidence I'll add some of my own.
There's circumstantial evidence to suggest that eating white rice can exacerbate myopia. And asians eat lots of white rice. I found my eyesight deteriorating and cut white rice out of my diet. I think it's stopped now.
Not to mention, myopia in Asia is the prevalent in dense populated areas such as Singapore, South Korea or Japan where rice consumption per capita is lower than anywhere else in south-east Asia since they can afford more variety of food when compared to Vietnam, Thailand or Philippines.
You could almost make an opposite case that rice consumption decreases myopia but most likely there is no link whatsoever.
There's circumstantial evidence to suggest that eating white rice can exacerbate myopia. And asians eat lots of white rice. I found my eyesight deteriorating and cut white rice out of my diet. I think it's stopped now.