How long can I wear my contact lenses in a day?
You should never exceed an average of 12 hours of lens wear per day. If you require longer wearing times because of your lifestyle, speak to your Optometrist about lenses that allow more oxygen to your eyes. Some individuals mistakenly believe that it is okay to wear one pair of lenses for some of the day and then change over to another pair for the rest of the day and so extend their wearing time. The suggested 12 hour wearing period is not specific to one pair of lenses. It means that in a day your eyes should never have more than 12 hours of lens wear irrespective of how many pairs you choose to wear!
 
What should I do if my contact lenses feel dry?
It is always wise to carry contact lens comfort drops in your handbag or back pocket. The preservative-free single use drops are best recommended and may be used as and when required for extra comfort. Environments to watch out for are smoky and dusty places, gyms, where working out causes your body temperature to rise and eyes to dry out as a result, air-conditioned and heated offices, especially when coupled with staring at a computer all day and long-distance driving. Take care to only use drops specified for use with contact lenses and ask your Optometrist if you are unsure.
 
What does the eye exam involve?
An Eye Exam allows the Optometrist to:
  • Determine any relevant prescription for your eyes (far or Near-sighted, Astigmatism, Presbyopia)
  • Check that the muscles of the eyes work together
  • Check your Eye Health and screen for any associated general health problems
  • Perform any further testing as deemed necessary like Eye Pressures, Visual Fields, Color Vision or Pupil Dilation
 
Why do we become more "far-sighted" as we grow older?
This is due to a progressive change that occurs within the natural lens of the eye and is called Presbyopia. Although similar to far-sightedness in its effect, these two conditions are not identical. Please see far-sightedness and presbyopia for more information.
 
What is a cataract?
A Cataract refers to any cloudiness within the natural lens of the eye. Most often, this is age-related, but accelerated risk of cataract is now caused by over-exposure to ultra-violet light. This is worsened by the fact that the Ozone Layer is constantly thinning. Our advice is to take care when in the sun and always don a hat and a good pair of UV-blocking sunglasses. Ask your Optometrist for more information. If you develop or are developing a cataract, don't worry unnecessarily. The sky does not fall down even though it might be slightly smeary to look at. A simple operation can be performed by an ophthalmologist whereby the cataractous lens of the eye is removed and replaced by a new implant. You will probably be sent home the same day!
 
 
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Glossary


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O

There are 16 entries in the glossary.
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Term Definition
Optometristalso known as doctors of optometry, or ODs, provide most primary vision care. They examine people’s eyes to diagnose vision problems and eye diseases, and they test patients’ visual acuity, depth and color perception, and ability to focus and coordinate the eyes. Optometrists prescribe eyeglasses and contact lenses and provide vision therapy and low-vision rehabilitation.
 


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