Wearing glasses can pose to be a hindrance for certain physical activities, especially sports and athletics. Therefore, the use of contact lenses has significantly grown around the world and it is here to stay, as it is very easy to use them. However, a majority of individuals use contact lenses for cosmetic reasons. These thin lens that are placed directly on the eye has come a long way since its introduction, in terms of the material that is used in manufacturing (hard, semisoft or gas permeable and soft), wearability, oxygen permeability and more importantly, comfort.
Types Of Contact Lenses And How To Use Them
Nowadays, about 90 to 95 per cent people use soft contact lenses worldwide, due to their comfort and availability. Contact lenses are available in many varieties depending on usage time and replacement:
- Daily disposable lenses – popular, good but expensive – discard after a single use.
- Weekly disposable lenses – change them every week.
- Biweekly, monthly or quarterly disposables.
- Yearly lenses – though it can be used approximately for one year, if you have discomfort and if you notice deposits on the lens or if the lens is damaged, replace it immediately.
- Spherical lenses are the most prevalent variety used.
- Toric lenses are for those who have high cylinder power.
- Bifocals or multifocal contacts for those who need distant and near vision.
- Coloured contact lenses to alter the appearance of your natural eye colour.
- Extended wear contact lenses – this type of contact lens is designed to be worn overnight, and they need to be removed for cleaning and disinfection once a week.
It is strongly recommended that contact lenses should be removed before sleeping. The eyes need oxygen. So while awake, during constant movements of the eye, sufficient oxygen reaches the eyes. But when you sleep with your contact lenses in, the amount of oxygen is reduced to your eyes, making your eyes vulnerable to infection and the development of corneal ulcers. Corneal infections (ulcers) are very serious, difficult to treat and may lead to corneal blindness, especially if neglected and delayed.
Problems With Using Contact Lenses For Too Long
- Blurred vision – dryness
- Irritation of eyes – due to allergy
- Sensitivity to light
- Excessive watering
- Overgrowth of surrounding blood vessels near the cornea
- Red eyes
What Not To Do
- Don’t use your lenses for beyond eight to ten hours a day
- Avoid lenses on weekends and as soon as you reach home
- Don’t overuse lenses and stick to the stipulated duration as suggested by the ophthalmologist
Corneal infections (ulcers) are very serious, difficult to treat and may lead to corneal blindness, especially if neglected and delayed.
Overtime the comfort comes down and wearable time gets reduced. This is known as contact lens intolerance. So if you experience any of the above mentioned problems discontinue using your lenses and meet your eye care practitioner for advice.
Contact Lenses Hygeine
Dos & Don’ts Of Using Contact Lenses
- A regular eye check-up as suggested by your eye care specialist
- Change the solution in the contact lens case every day
- Clean your hands while inserting and removing contact lenses
- Clear your contact lens case every week
- Check the contact lens daily before use
- Look for dust and deposits on the lens
- Look for cracks and tears, especially at the edges
- Discard damaged lenses