Contact Lens Clinic
As the use of contact lenses has grown exponentially in recent years, so has the demand for contact lenses that can enhance vision without the need for eyeglasses. The most common types of contact lenses include soft lenses and rigid gas permeable lenses. Contact lenses have become increasingly popular as people have sought to correct their vision without the need for eyeglasses or other types of corrective lenses. Contact lens enhance the vision of the wearer by reducing spectacle aberrations and increasing the visual field, thus giving a natural vision.
Contact Lens Materials
Contacts are made up of different types of materials. When considering contact lenses, you need to select material that will best satisfy your needs. According to material used, there are five types of contact lenses -
Soft lenses - made from hydrogels - gel-like water-containing plastic. Soft lenses are very thin and pliable.
Silicone hydrogel lenses - these are advanced version of soft contact lens material. Silicon hydrogel lenses allows more oxygen to pass through the lens. Silicone hydrogel contact lenses are most popular type of contact lenses.
Gas permeable lenses (GP or RGP lenses) - rigid contact lenses that maintain their shape on the eye, enabling them to correct astigmatism and other refractive errors. Gas permeable contact lenses typically are smaller in diameter than soft lenses and are made of highly oxygen-permeable materials. It usually takes some time for your eyes to adjust to GP lenses when you first start wearing them; but after this initial adaptation period, most people find GP lenses are as comfortable as soft lenses.
Hybrid contact lenses - have a rigid gas permeable central zone, surrounded by a "skirt" of hydrogel or silicone hydrogel material. They are designed to provide wearing comfort that rivals soft or silicone hydrogel lenses, combined with the crystal-clear optics of GP lenses.
PMMA lenses - rigid contact lenses that look like GP lenses but are made of a plastic material that is not oxygen permeable. PMMA lenses were commonly prescribed years ago, but essentially have been replaced by gas permeable lenses.
Following contact lenses are available depending on your eye condition and usability, at Jai Drishti Eye Hospital, Udaipur -
Soft contact lenses.
Standard Contact lenses - These lenses can be worn every day for about 8 hours. These contact lenses need to be replaced every year. They are available as spherical lenses as well as toric lenses.
Disposable contact lenses - These new generation of lenses are available as spherical and toric contact lenses are disposable and can be changed every quarterly, monthly, fortnightly, weekly or on a daily basis.
Cosmetic contact lenses - These lenses are used to enhance cosmetic appearance of eye by changing the eye color.
Semi-soft contact lenses - Few people are not comfortable with soft contact lenses either due to allergy or due to under correction of high astigmatism. In such cases emi-soft contact lenses are advised.
Rose K lenses - These lenses are used in special eye condition known as keratoconus.
Scleral lenses - Scleral contact lenses are custom-made for each wearer. They are helpful in irregular corneal curvature conditions such as keratoconus.
Kerasoft lenses - These are also recommended in keratoconus.
FAQs - Contact Lenses
Q1. What is the difference between contact lenses and eyeglasses?
Contact lenses are a type of glass that can be placed over your eyes to correct vision. Eyeglasses are a frame that holds a lens over your eyes.
Q2. How do I take my contact lenses out?
Use the middle finger of your dominant hand to gently pull down your lower eyelid on one eye. While looking up, use the index finger of that same hand to gently pull the lens down to the white part of your eye. Pinch the lens with your thumb and index finger and remove from your eye. Before taking them off, you need to wash your hands with soap and water.
Q3. Is it safe to use contact lenses while driving?
Yes, it is safe to use contact lenses while driving. It's also safe to use them when you're working out.
Q4. Is it safe to swim or shower with contact lenses?
No. Do not swim or shower when you are wearing contact lenses, as water can damage integrity of your contact lenses.
Q5. What are the most common eye diseases that affect contact lens wearers?
The most common eye diseases that affect contact lens wearers are dry eye, allergies, and infections.
Q6. Should I sleep with lenses?
Don`t sleep with contact lenses as it may increase chances of infection and other complications.