Contact Lenses For Correct Vision

What Are Contact Lenses?

Contact lenses are thin, clear plastic disks that you wear in your eyes to improve your vision. Contacts float on the tear film covering your cornea.

Like eyeglasses, contact lenses correct the vision problems caused by refractive errors. A refractive error is when the eye does not refract (bend or focus) light properly into the eye resulting in a blurred image.

Contacts can improve vision for people with these refractive errors:

  • Myopia (Nearsightedness)
  • Hyperopia (Farsightedness)
  • Astigmatism (Distorted Vision)
  • Presbyopia (Changes to near vision that normally happen with age)

Reasons To Consider Contact Lenses

  • Contact lenses move with your eye, allow a natural field of view, have no frames to obstruct your vision and greatly reduce distortions.
  • Unlike glasses, they do not fog up or get splattered by mud or rain.
  • Contact lenses are excellent for sports and other physical activities.
  • Many people feel they look better in contact lenses.
  • Compared to eyeglasses, they may offer better, more natural sight.

Some Things To Remember About Contact Lenses

  • Compared with glasses, contact lenses require a longer initial examination and more follow-up visits to maintain eye health. Lens care also requires more time.
  • If you are going to wear your lenses successfully, you will have to clean and store them properly, adhere to lens-wearing schedules and make appointments for follow-up care.
  • If you are wearing disposable or planned replacement lenses, you will have to carefully follow the schedule for throwing away used lenses.

Types of Contact Lenses

Contact Lenses are made from many kinds of plastics. The two most common types of contact lenses are hard and soft.

Hard Contact Lenses

The most common type of hard contact lens is a rigid gas-permeable (RGP) lens. These lenses are usually made of plastic combined with other materials. They hold their shape firmly, yet they allow oxygen to flow through the lens to your eye.

RGP lenses are especially helpful for people with astigmatism and a condition called keratoconus. This is because they provide sharper vision than soft lenses when the cornea is unevenly curved. People who are allergic or have a tendency to accumulate proteins in their contacts may also prefer RGP lenses.

Soft Contact Lenses 

Most of the people chooses to wear soft contact lenses. This is because they tend to be more comfortable and there are many options. Here are some types of soft lenses.

Daily Wear Contacts Lenses

You wear these when you are awake and take them off when you go to sleep. Many are disposable, meaning that you wear a new pair of contacts each day. Or you can choose contacts that last longer and only need to be changed once a week, every two weeks, or every month. Some ophthalmologists recommend disposable daily wear contacts if you use them only occasionally.

Extended Wear Contacts Lenses 

You can wear these while you sleep, but they need to be removed for cleaning at least once a week. Fewer eye doctors recommend these contacts because they increase the chance of getting a serious eye infection.

Toric Contacts Lenses

These can correct the vision for people with astigmatism, though not as well as hard contact lenses. Toric lenses can be for daily or extended wear. But they often cost more than other types of soft contact lenses.

Colored (Tinted) Contacts Lenses

Vision-correcting contact lenses can be tinted to change the color of your eye. You can get them as daily wear, extended wear, and toric lenses.

Decorative (Cosmetic) Contacts Lenses

These lenses changes the look of your eyes but do not correct the eyesight. These include colored contacts and lenses that can make your eyes look like vampires, animals, or other characters. In addition, they are used to hide certain eye problems that are either present from birth or caused by injuries. You need a prescription for decorative contacts, even if they don't fix vision. To avoid dangerous eye infections, these lenses should be treated like prescription contacts. This means cleaning them regularly and thoroughly as directed.

Other Types Of Contact Lenses

Contact For Presbyopia- Presbyopia contacts are designed to correct common vision problems that occur in people after the age of 40, when it becomes difficult to see near objects clearly. There are various options for these corrective lenses.

These Options Include: bifocal or multifocal contact lenses, and monovision correction, where one eye wears a near vision lens and the other eye wears a distance vision lens.

Hybrid Contact Lenses- These lenses have a rigid center surrounded by a soft outer ring. It combines the crisp vision of a hard lens with the comfort of a soft lens.

Scleral Contact Lenses- These gas permeable (GP) lenses stretch over the cornea and rest on the sclera or white part of the eye. Their large size helps correct vision problems caused by an irregularly shaped cornea (such as a corneal scar, keratoconus or surgery). But others may find that they provide better comfort than normal GP lenses.

Bandage Lenses- These contacts do not have a prescription built into them. Instead, they cover the surface of your cornea for comfort after an injury or surgery.

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