You may go back to your old prescription as an over correction of myopia often gives rise to eye strain. You need to have a complete check up for glaucoma which includes optic nerve head and retinal nerve fibre analysis; vital field analysis and central corneal thickness measurement. A family history of
diabetes, hypertension, glaucoma are among the risk factors. Smoking and tobacco consumption is another risk factor. Please have a complete discussion with your doctor. Do not worry.