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An ideal eye has perfect near and distance vision. This means that the cornea (the front surface of the eye) and lens (located in the middle of the eye) focus objects clearly onto the retina (the part of the eye that processes vision) no matter how near or far that object is from you.

Unfortunately, not everyone has perfect vision. Many people have one or more of the following conditions - nearsightedness, farsightedness, astigmatism, or presbyopia – and their vision usually needs to corrected in some way.

Additionally, we can develop other conditions in the eye that, while usually harmless, do affect how well we see. We can also strain the eye’s normal or optimal functioning by the work we do and how we need to use our eyes as a result.

Learn more about these common vision conditions and what you should do if you experience a problem with your eyes.