1. The
Essential
Guide to
Laser Eye
Surgery
PART 1: Why do you need glasses?
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2. This means YOU!
EVERYONE will need to wear glasses in their
lifetime, either for distance or reading or both!
3. Why can’t you see clearly?
There are 4 reasons why
you will need glasses:
•short sight (myopia)
•long sight (hyperopia)
•astigmatism
•presbyopia
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4. Normal sight: Distance vision is good because
focusing is exactly on the retina
Age: All sight is good until 45 when close vision fails
Normal eye Refractive errors
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5. Short sight: Distance vision is blurry because
focusing is too strong inside the eye
Age: Starts usually teens to twenties
Short sight Refractive errors
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6. Long sight: Distance may be good initially but near
vision blurry as focusing is too weak inside the eye
Age: Starts usually thirties to forties - later distance
vision will become blurred
Long sight Refractive errors
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7. Astigmatism: Distortion at all distances due to
uneven focusing
Age: Starts young, may worsen in teens to twenties
Astigmatism Refractive errors
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8. Presbyopia (ageing eyes)
•loss of close vision
•starts around 45
•progresses to 65
•may require varifocals
or 2 pairs, one for
distance and one for
reading
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9. Presbyopia: Close vision is blurry because the lens
inside the eye is too weak to focus on near objects
Age: Starts usually in mid forties but everyone
affected by age 51
Presbyopia Refractive errors
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10. Laser eye surgery
• All glasses problems can now
be treated with laser eye
surgery
• Biggest advances have been in
treating near vision for age
related presbyopia
• Reading correction available
from FOCUS Laser Vision
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