| Astigmatism
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This is that condition of the eye in which a point of light cannot be made to
produce a point image upon the retina by any spherical correcting lens. It is
caused mainly by a difference in the surface curvature of the eye. Instead of
being shaped like a perfect sphere, the eye is shaped with a greater curve in
one axis. If a child has significant astigmatism fine details may look blurred
or distorted and may cause worst forms of eye-strain. Aching of the eyes and
headaches are common. Glasses that are prescribed for astigmatism have greater
strength in one direction of the lens than in the opposite direction.
The role of the teacher
The effects of refractive errors are often first noticed in school. A child
cannot see the blackboard clearly, or finds it difficult to read or write. The
child may complain of eye strain or may have occasional crossing of eyes
especially towards the end of the day. You as teachers may be the first one to
notice the disability and can provide important input into the decision
regarding the need for glasses. When a child is prescribed glasses he/she needs
to wear them constantly. Since a teacher’s words carry a lot of weight for a
child, you may play a role in the initiation. The children who need patching of
one eye also need extra support so as to be comfortable in school. Teasing by
classmates is an important cause for refusal of the child to wear glasses or
undergo occlusion therapy.
Refractive Errors |
Myopia | Hyperopia |
Astigmatism | Anisometropia
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