Emmetropia, myopia, hyperopia, astigmatism, or presbyopia
- 75% of Americans wear some form of corrective lenses
- 60% of Americans have myopia (near-sighted)
- 30% of Americans have hyperopia (far-sighted)
- Nearly all adults at some point in their life will have presbyopia
So which do you have?
- Emmetropia: Normal vision
- Myopia: If you have myopia, distant objects are blurry making it difficult to drive or watch TV. Myopia is caused when images come to a focus behind the retina because the eye is too long.
- Hyperopia: If you have hyperopia, close objects are blurry making it difficult to do tasks such as reading or sewing. Hyperopia is caused when images come into focus in front of the retina because the eye is too short.
- Astigmatism: You can have hyperopia or myopia and also have astigmatism because the light entering the eye does not fall at the proper focal point.
- Presbyopia: Sometime after the age of 40, almost everyone will have presbyopia. This occurs due to loss of elasticity of the lens making it hard to focus sharply for near vision.
If you have one of these conditions, other than emmetropia, you aren’t alone! Over 225 million Americans use corrective lenses.