Contact lenses are small, transparent plastic discs that are worn in the eye to improve eyesight. These lenses float on the tear film that coats the surface of your cornea. Contact lenses, like eyeglasses, are used to address visual impairments caused by refractive defects. When the eye does not properly refract (bend or focus) light entering the eye, a refractive error occurs, resulting in a hazy image.
Different types of contact lenses:
Contact lenses are divided into two types: soft and Rigid gas permeable (RGP). A valid prescription is required for all contact lenses.
- Soft Contact Lenses
Soft contact lenses are made of flexible and soft polymers, which help pass oxygen through the cornea. Soft contact lenses are more pleasant and simpler to regulate than stiff gas permeable lenses. Silicone-hydrogels are used in newer soft lens materials to deliver more oxygen to your eyes while you use your lenses.
- Rigid Gas Permeable (RGP) Contact Lenses
Rigid gas permeable contact lenses (RGPs) are highly durable and are very less prone to the formation of deposits, and they provide better, crisper vision in general. Because their endurance power is longer than soft contact lenses, they are typically less expensive over time.
They’re less likely to tear and are easier to work with. However, they are not as comfortable as soft contact lenses initially, and it may take a few weeks to adjust wearing RGPs while only a few days for the soft contacts.
- Extended Wear Contact Lenses
Extended wear contact lenses can be used for up to a month and could be worn throughout the night or continuously without any fear. For extended wear purposes, soft polymers are very commonly used. They’re made of flexible polymers that allow oxygen to reach the cornea of the eye.
Only a few lenses that are rigid gas permeable ones are designed and authorized for use at night. The length of continuously wearing of lenses is determined on the basis of the type of lens used and your level of tolerance for wearing it overnight, as your doctor must have determined. A plan of removal should be followed, as it is critical to give your eyes some rest without lenses.
- Disposable (Replacement Schedule) Contact Lenses
The majority of people who wear soft contact lenses require to change them quite often. The FDA defines “disposable” as “used once and cast-off.” a disposable schedule is followed, and a new lens is utilized daily.
Contact lens marketers may refer to some of the soft contact lenses as “disposable,” yet they are actually intended for frequent or planned replacement.
How to Choose the Contact Lenses?
Choosing the correct contact lenses is something you need to discuss with your ophthalmologist. The refractive error of your eyes, how much usage of contact lenses your eyes can handle, what are your expectations, and how much are you motivated for taking care of your lenses. Everything plays a role in helping you to make the best decision. These are a few important things that you should consider before choosing the best contact lenses.
Are you planning to wear the contact lenses every day or just on the weekends? The majority of people use soft contact lenses, which can be worn throughout the day or just for a few hours and are usually very comfortable. For rigid gas permeable contacts to be used to, they must be worn everyday.
Coloured contact lenses are used to create a unique look. Even if you have dark eyes, these coloured soft contact lenses can enhance or modify the color of your eyes. Green contact lenses, blue contact lenses, brown contact lenses, and grey contact lenses are among the most commonly used ones. Green contact lenses and blue ones are usually used by people who have a fairer skin tone as compared to the other colours.