There are many types of contact lenses, so new users may be confused and overwhelmed by the amount of information. However, it is pretty simple.
1. Contact lenses can be divided due to the material from which they are made:
Nowadays-soft lenses dominate and those can be divided into two types:
- Silicone hydrogel (the latest generation of lenses designed to be worn during the day and night).
The hydrogel lenses have lower oxygen permeability, due to the material they are made of; therefore, they should be worn only during the day. Silicone hydrogel lenses have high oxygen permeability and can be worn during the day or at night (around the clock without removing). Your eye care professional should first evaluate your tolerance for overnight wear. It is important for the eyes to have a rest without lenses for at least one night following each scheduled removal.
Corrective lenses can be prescribed depending on the type of eye disease:
- Myopia (spherical lenses)
- Hyperopia (spherical lenses)
- Astigmatism (toric lenses)
- Presbyopia (progressive lenses).
2. Lenses can be also divided based on when they can be worn:
- Daily (worn during the day ONLY; taken out at night)
- Continuous (can be worn at night).
3. The lenses also categorized due to their replacement schedule:
- One day (one-off)
- Two weeks,
4. Lenses can also classified due to the purpose:
- Cosmetic Among the distinguished cosmetic lenses color lenses that can fulfill both functions at the same time (but not necessarily) vision correction and eye color change.
Color lenses can be divided into two types:
- Completely changing your eye color,
- Emphasizing the natural color of the eyes.Corrective lenses,Cosmetic lenses,
Some contact lenses do not correct vision and are intended solely to change the appearance of the eye. They are sometimes referred to as plano, zero-powered or non-corrective lenses.
Most of the time wearing contact lenses is problem free. However, it is important that the patient knows how important it is to take good care of them. Microorganisms and bacteria easily adhere to the surface of contact lenses. To avoid vision-threatening complications, you must carefully follow directions for lens care. In order to minimize the risk of a complication with the health of your eyes related to contacts, take the following steps:
- Use doctor recommended solution with your lenses. Store brands are not recommended.
- Saline is NOT to be used as a disinfectant. Saline is only to be used for rinsing.
- Do not top off used lens cleaning solutions or reuse them.
- Use a contact lens solution to clean and rinse; then air dry contact lens cases after each use.
- Rub and rinse contact lenses for added effectiveness of cleaning and disinfection.
- Do not expose contact lenses or lens storage cases to any type of water or other non-sterile solutions.
- Do not use contact lens solutions beyond their expiration date.
- Consult your doctor before using over-the-counter drops whole wearing your lenses.
- Always have a wearable pair of glasses even if you “never” wear your glasses.
- Stick to your recommended replacement schedule
- Replace your contact lens case every three months
- Use sterile saline or multipurpose solution to rinse case, then wipe case dry with a tissue.
- Ask your doctor if daily disposable lenses are available in your prescription; these are the healthiest option
- Remove your lenses and consult your eye doctor if you experience redness, pain, irritation, sensitivity to light, or decreased vision.