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| REFRACTIVE ERRORS - PATIENT INFORMATION
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Q:
My husband and I have glasses. What are the chances that my child
will get glasses?
A:
At birth practically all eyes are hypermetropic (farsighted) to
the extent of 2.5 to 3.0 diopters and as the growth of the body
proceeds the axial length increases until when adolescence is passed.
The eye should normally be emmetropic (without any number). As a
matter of fact it is found that in over 50% of the population emmetropia
is not reached, some degree of hypermetropia persists. On the other
hand, the eye may become myopic (short sighted). It is generally
genetic (i.e. hereditary). If both the parents are wearing glasses
then there are high chances of child getting glasses. To rule out
whether a child needs glasses or not, regular eye check up at definite
intervals is advisable.
Q:
What are the various therapies available to treat refractive errors
?
A:
As we have seen that the basic problem for a person with a refractive
error (i.e. eye number) is that the focused image of the seen object
is not formed at the plane of the retina. So the basic principle
of treatment is to shift the focused image on the retina to see
the object perfectly clear. To do this there are different methods
used by the ophthalmologist.
Note:
only the following methods of treating the refractive errors are
effective. No sort of exercise or medicine can cure the refractive
error.
1.Optical
treatment: This is the simplest & most commonly used method. Refractive
errors are corrected by the use of glasses or contact lenses.
For
Hypermetropia, Convex or Plus(+) number glasses are used.
For Myopia, Concave or Minus(-) number glasses are used.
For Astigmatism, Cylindrical glasses are used.
Contact
lenses – This is the next most widely used method.
Contact
lenses are of various types:-
Hard
lenses.
- Semi
soft lenses-
- Regular
semi soft lenses.
- Extended
wear semi soft lenses.
- Soft
lenses-
- Regular
soft.
- Daily
disposables.
- Cosmetic
soft lenses.
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Last
updated on 12-07-2001 |
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