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Contact Lenses (EW)
Contact lenses, or EW (extended wear) lenses, are a type of corrective lens that is placed directly on the eye's surface. They are designed to be worn for an extended period, including overnight. EW lenses are made from different materials, such as silicone hydrogel, that allows oxygen to pass through to the cornea. Proper cleaning and maintenance are necessary to prevent eye infections and other complications.
Types of contact lenses
Different options to buy contact lens are listed below:
- Soft Contact Lenses: Made of a flexible, soft plastic material that allows the passage of oxygen through to the eye. The lens can correct various vision problems, including nearsightedness, farsightedness, and astigmatism. Available in daily disposable, bi-weekly, monthly, and extended wear options.
- Rigid Gas Permeable (RGP) Contact Lenses: Made of a rigid, gas-permeable material that permits oxygen to pass through to the eye. The lens can provide clear vision and are more durable than soft lenses. They can correct astigmatism and presbyopia.
- Hybrid Contact Lenses: Combination of a rigid gas-permeable centre and a soft outer ring for comfort. Can correct astigmatism and presbyopia.
- Scleral Contact Lenses: Large diameter lenses that rest on the sclera (white part) of the eye. Used to correct severe astigmatism and other vision problems.
- Orthokeratology (Ortho-K) Contact Lenses: Specialised lenses that are worn overnight to reshape the cornea temporarily and correct nearsightedness.
- Coloured Contact Lenses: Tinted lenses used for cosmetic purposes to enhance or change the colour of the eyes. Can be prescription or non-prescription.
Importance of eye lenses
Eye lens plays a crucial role in the process of vision. It is a transparent, flexible structure that sits behind the iris and focuses light onto the retina, allowing us to see objects clearly at various distances. As we age, the lens can become less flexible and lead to vision problems such as presbyopia, cataracts, and other conditions. Proper care of the eye lens, including regular check-ups and protective measures such as wearing sunglasses, can help to maintain healthy vision.
FAQs:
Is it good to wear contact lenses?
Wearing contact lenses can be a convenient option for those who prefer not to wear glasses. However, it is important to follow proper hygiene and care instructions to prevent eye infections or other complications. Consult with an eye doctor to determine if contact lenses are suitable for you, before buying lenses online.
Which contact lens is best?
There is no single "best" contact lens for everyone, as different people have different vision needs and preferences. Consult with an eye doctor to determine the type of contact lens that is most suitable for your individual needs, which may include soft or rigid lenses, daily disposables, toric lenses for astigmatism, or multifocal lenses for presbyopia.
Are contact lenses better than glasses?
Contact lenses and glasses, both have their advantages and disadvantages. Contact lenses offer greater convenience and peripheral vision but require more maintenance and can be uncomfortable for some. Glasses are easier to use but may not provide optimal vision correction for certain activities. Ultimately, the choice depends on personal preference and lifestyle.
Does wearing contacts improve your vision?
Wearing contact lenses can improve vision by correcting refractive errors such as nearsightedness, farsightedness, and astigmatism. However, improper use or poor hygiene can cause eye infections or other complications that can worsen vision.
Do contact lenses expire?
Yes, contact lenses do expire. Most have an expiration date printed on the packaging and should not be used beyond that date to ensure safety and effectiveness. It is important to follow the manufacturer's instructions for storage and replacement of contact lenses.