Got blurry vision and thinking of buying new glasses? 👓 Wait—check your blood sugar first. When blood sugar is high, it changes the shape of the lens inside your eye. That means your vision can shift day to day. If you do refraction or buy glasses during this time, the prescription may be wrong. Why it matters: Once blood sugar is controlled and stable, your vision usually settles. That’s when refraction is accurate—and your glasses actually work long-term. So control blood sugar first, then ch