How do Contact Lenses Work

Contact lenses work to correct vision like eyeglasses do: They alter the direction of light rays to focus light properly onto the retina. These contact lens options are designed for people who wear contact lenses and experience astigmatism, nearsightedness, farsightedness, or presbyopia. Corrective contact lenses can be used as a complementary solution for those with these common eye conditions.

Why are contact lenses thinner than eyeglass lenses?

The contact lenses are thinner than eyeglasses because they don’t have to pass through several different structures in the eye. They go directly into your eyelids, then onto your cornea and iris, which is where vision correction takes place.
The entire lens surface of eyeglasses is the optic zone, whereas contact lenses only cover the central aspect. Contact lens materials have evolved to be more breathable, safer for your eyes, and easier to wear. They’re now made of soft plastic that is flexible enough so you can comfortably blink without having your contact slip out of place or irritate your eye. The contact also has high water content, so it will always stay moist inside the cornea, allowing oxygen through them, allowing healthy cell growth, and maintaining their shape better than hard glasses ever could.

Is wearing contact lenses possible if you are long or short-sighted?

Yes, contact lenses are possible for people with short or long-sightedness.

Types of contact lens include:

  • Spherical
  • Toric
  • Multifocal

Spherical contact lenses correct the eye’s power in all directions; they’re used to treat nearsightedness, farsightedness, and astigmatism (where light rays entering your eyes aren’t focused properly).

Toric contact lenses help bring light into focus when there is a difference in one eye’s focusing ability; this type of lens can be prescribed if you have astigmatism.

Multifocal contact lenses work like bifocals do by providing two different focuses across the surface area of the lens; these types of contact lenses are often prescribed to patients who require distance and near vision correction.

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