If your prescription reads +2.25, that means your eyeglasses need 2.25 diopter of strength to correct farsightedness. Remember, the higher the number, the more correction your vision needs. Again, 2.25 glasses are a mild number between +/- 2.25 to +/- 5.00. It is also required to moderate numbers. +2.25 also means that the patients belong to long-sightedness, so objects up close appear more blurred.