Contact lenses: types and main functions

Contact lenses: types and main functions

Contact lenses are optical devices that are placed directly on the surface of the eye to correct vision defects or for therapeutic purposes, but how many types of contact lenses are there? There are different types of contact lenses, each with specific functions. Let’s find out together what they are.

The main types of contact lenses and their functions

Contact lenses are thin, transparent optical devices. They can be made of soft or rigid gas-permeable materials.

Below is a list of the main types of contact lenses.

Corrective contact lenses

These lenses are designed to correct visual defects such as myopia (difficulty seeing from a distance), hyperopia (difficulty seeing up close), astigmatism (image distortion) and presbyopia (age-related difficulty focusing at close range). Soft and rigid gas-permeable contact lenses are available which offer a Clear and comfortable vision.

Colored contact lenses

These lenses allow you to change the color of your eyes, whether for aesthetic purposes or for theatrical or cinematic purposes. They can be opaque or translucent, and can also be used by people without visual defects for purely aesthetic purposes.

Toric contact lenses

Toric lenses are specifically designed to correct astigmatism, a visual defect characterized by an irregular curvature of the cornea. These lenses are designed to fit the unique shape of the eye and correct astigmatism to provide clear vision.

Multifocal contact lenses

These lenses are used to correct presbyopia, an age-related vision problem that causes difficulty focusing up close. They allow you to have a clear view both near and far by combining different optical zones on the lens.

Therapeutic contact lenses

These lenses are used for therapeutic purposes, such as protecting the ocular surface after surgery, managing dry eye, or protecting the eyes from environmental damage such as wind, dust, or UV rays.

Orthokeratology contact lenses

These lenses are worn overnight and temporarily shape the cornea to correct vision during the day. They offer clear vision without the need to wear lenses during the day.

Cosmetic contact lenses

There are also special contact lenses for specific purposes, such as sclera effect contact lenses (covering the entire sclera of the eye), contact lenses for sensitive or allergic eyes, and colored therapeutic contact lenses used in the medical field for specific treatments.

It is important to consult with a professional in the field, such as an optician or ophthalmologist, to obtain a proper evaluation and prescription for contact lenses, as the choice will depend on your individual vision needs and eye characteristics.

What are the main functions of contact lenses?

Contact lenses are thin, transparent and curved devices, which are placed directly on the surface of the eye to correct major visual defects or for therapeutic purposes.

The main functions of contact lenses are as follows:

• Visual correction. Contact lenses are often used to correct vision defects such as nearsightedness (difficulty seeing at a distance), farsightedness (difficulty seeing up close), astigmatism (visual distortion), and presbyopia (age-related difficulty reading up close).

• Improved aesthetics. Some people choose to wear colored or decorative contact lenses for cosmetic reasons, to temporarily change the color of their eyes.

• Sports activities. Contact lenses can offer an advantage during sports activity, as they do not slip or fog up like glasses. They also offer wider peripheral vision and do not restrict the field of vision like glasses.

• Therapeutic use. Therapeutic contact lenses can be used to treat certain eye conditions, such as lazy eye occlusion (amblyopia), recurrent corneal erosion, eye lesions, and dry eye. These lenses can protect the surface of the eye or aid in the healing of injuries.

• Night vision. There are contact lenses designed to improve night vision, reducing glare and increasing contrast. These lenses are often used by drivers, night drivers, and people working in low-light environments.

• Multifocal contact lenses. These lenses have been designed to provide proper vision at different distances, allowing you to see clearly up close, at half distance, and at a distance without the need for glasses.

• Change the appearance of the eyes. Special contact lenses , such as those used in film or theater, can be used to create special effects, such as different colored eyes, animal eyes, or futuristic eyes.

Why is it important to wear contact lenses?

Contact lenses should be used in accordance with the optician’s or eye care professional’s instructions. They require proper hygiene and maintenance in order to ensure the safety and health of the eyes. Your eye care professional can provide guidance on the most suitable contact lenses for your specific concerns.

It is important to wear contact lenses for several reasons, such as:

• Advanced visual correction. Contact lenses offer more advanced vision correction than glasses. They can correct a wide range of vision defects. In addition, because contact lenses fit directly on the surface of the eye, they offer sharper, distortion-free vision.

• Freedom of movement. By wearing contact lenses, you have the freedom to move around without having to worry about glasses slipping or falling off.

• Better aesthetics and self-confidence. For many individuals, wearing contact lenses instead of glasses can improve facial aesthetics. Colored or decorative contact lenses can also offer the ability to temporarily change your eye color or experiment with different looks, contributing to a greater sense of confidence and self-worth.

• Peripheral vision and clarity. Contact lenses offer wider peripheral vision than glasses, as they fit directly on the eye.

• Special options for specific needs. There are special contact lenses that are designed for therapeutic purposes, such as protecting the eyes after an operation or for treating specific eye conditions. There are contact lenses that are specially designed for night vision, for sports activities or to correct vision at different distances.

• Better comfort and convenience. Modern contact lenses are designed to provide optimal comfort throughout the day. They are available in breathable materials that allow oxygen to reach the eye, reducing eye irritation and dryness. Contact lenses are easy to put on, remove and clean.