If you don't have 20/20 vision but your eyes are otherwise healthy, you can choose between glasses and contacts to help you see. There are positives and negatives to both. Your choice really depends on your lifestyle and personal preference.
There are two types of eyeglasses. Single vision glasses correct distance issues, and multifocal ones help with distance and with near-vision issues, like reading.
Multifocal lenses come in various forms:
Bifocals have correction on the upper half of the lenses for distance and the lower half of the lenses for reading.
Trifocals have three areas. There's the top half for distance, the bottom for reading, and a third area in between for middle vision.
Progressive lenses are bifocals and trifocals without a dividing line. They have a smooth transition between the vision areas.
Glasses used to be made of glass. Now, most are made of plastic. Plastic lenses are lighter and can be treated with coatings to protect your eyes. But plastic is more likely to scratch than glass.
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