I see black spots floating around in my vision especially when the sun is out - what are they?
These are called floaters. As the eye ages, more of these are seen and they are due to the changes in the vitreous jelly of the eye. The vitreous is simply a clear jelly that fills up the internal space of the eyeball between the lens and the retina. Changes may occur which cause the very fine fibrils contained in the jelly to clump together and become visible as floaters. As long as these are longstanding and not associated with any flashing lights, they are generally okay and all you would need to do is notify your Optometrist and keep a watchful eye on them. If however you have not seen them before and they have only recently appeared, a thorough check with your optometrist or better still, an ophthalmologist (eye doctor), is advised. Floaters are most easily seen against a white or bright background. This is why they are more visible in the sunshine, against white walls or whilst flying and looking out at the clouds. Sometimes floaters are an indication of retinal tears and possible detachment of the retina. Although this does not happen all that often it is wiser to be safe rather than sorry so if in doubt, please find out!
 
Can my contact lenses get 'lost' behind my eyeball?
No, this can NEVER happen as the eyeball has a 'safety net' situated underneath both eyelids. This 'safety net' is a membrane called the conjunctiva. The conjunctiva is a continuous membrane enveloping the outer portion of the eyeball as well.
 
How difficult is it to adapt to multifocals?
The first time any spectacles are worn some adjustment time is required mainly because the new, clear vision needs to be accepted by your brain. Once it has learnt to recognize the images seen through the spectacles and become familiar with them, the initial “WOW” effect should have worn off. Multifocals are slightly trickier than single focal specs since they change in power as the eyes look from the top to the bottom of the lenses. Your eyes need to learn which parts of the lens to use when looking either close-up, far-away or in-between. Your Optometrist can advise you on tricks to help you get started and in no time you should be well on your way to successful multifocal wear. A few individuals may struggle with these type of lenses simply because they cannot tolerate the changes in power which is inherent in the design of these. We advise that a period of 4 weeks be allowed before deciding that multifocals are not for you.
 
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
 
What are the advantages of glass lenses over plastic lenses?
Plastic lenses are lighter and have 3 x the impact resistance of glass while glass lenses are thinner.
 
 
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Glossary


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T

There are 16 entries in the glossary.
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Term Definition
TrifocalsTrifocals are prescribed to aid near, far and middle distance seeing. The trifocal lens design has three distinct areas of power to be used, with visible lines dividing the three distinct areas of power prescription.
 


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