What is negative power in eye?

A:Negative power means you have myopia or short-sight. Ask the doctor to check your retina and intra-ocular pressure (IOP), and if they are normal you don’t have to worry. It is just that your eye is a little longer and so you need minus glasses so that the rays can get focused on your retina.Click to see full answer. Also know, what does a negative eye power mean?A plus sign in front of the number means you are farsighted and a minus sign means you are nearsighted. These numbers represent diopters, the unit used to measure the correction, or focusing power, of the lens your eye requires. This is a fairly mild amount of nearsightedness.Likewise, what is positive and negative eyesight? The first number indicates the power of the lens required to correct your nearsightedness or farsightedness. If this number is negative, you are nearsighted, or you have difficulty seeing distant objects. A positive number indicates you’re farsighted, or you have difficulty seeing close objects. Correspondingly, what is the lowest eye power? The lowest strength is plus 1 diopter, and the glasses step up in increments of 0.25 diopters, to a maximum of plus 3.5. Anyone who needs more power than that has to turn to prescription glasses.Is minus 3 eyesight bad?This number is used to identify how strong your lenses need to be to correct your vision. If the number has a minus (-) sign next to it, it means you’re nearsighted. A plus (+) sign or no sign means you’re farsighted. A higher number means that you have a more severe astigmatism.