Blurry eyes after eating may be caused by tear film instability, diabetes, glaucoma and other reasons. 1. Tear film instability: During meals, heat may irritate the eye and affect the distribution of tears, resulting in the symptom of blurry eyes after eating. 2. Diabetes: Diabetic patients suffer from changes in osmotic pressure in the lens of the eye due to fluctuations in blood sugar, resulting in blurred vision and loss of vision. Elevated blood sugar after meals will lead to lens bulging and thus refractive interstitial changes, resulting in symptoms of blurred eyes after eating. 3. Glaucoma: Glaucoma is caused by increased intraocular pressure and optic nerve damage, which manifests itself as blurred vision and headache, and is accompanied by blurred eyes after eating. If the symptoms of blurred eyes after eating occur frequently, you should go to the hospital in time and follow the doctor’s instructions.