What is perfect eyesight?
What is perfect eyesight? While 20/20 vision is considered to be perfect, it's not actually what we think of as perfect. Many people, mostly children, have better than 20/20 vision. Healthy eyes can easily go down to the 20/15 level with some accuracy.
What is the highest eye prescription?
SPH: Prescription spherical correction ranges between 0.00 and +/- 20.00. The farther away from 0 your prescription is, the stronger the lenses are made to correct vision problems.
How bad is a 1.50 eye prescription?
This prescription is for the left eye, and -1.50 means that your nearsightedness is measured at 1 and 1/2 diopters. It's considered a mild amount of nearsightedness. SPH indicates the adjustment for spherical power, with a prismatic correction of 0.5 Base Up.
Is minus 7 legally blind?
What Eye Prescription is Considered Legally Blind? If your prescription is -2.5 or lower, this means that you are legally blind. Visual acuity of -2.5 is equivalent to 20/200 vision. Visual acuity of -3.0, for instance, means that you have 20/250 or 20/300 vision.
What does it mean to have 20 40 vision?
A person with 20/40 vision sees things at 20 feet that most people who don't need vision correction can see at 40 feet. This means that they are nearsighted, but only slightly.